diff --git a/applications/drivers/subghz/cc1101_ext/cc1101_ext.c b/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
index ae3556396..357214505 100644
--- a/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
+++ b/applications/drivers/subghz/cc1101_ext/cc1101_ext.c
@@ -85,7 +85,7 @@ typedef struct {
     volatile SubGhzDeviceCC1101ExtState state;
     volatile SubGhzDeviceCC1101ExtRegulation regulation;
     const GpioPin* async_mirror_pin;
-    FuriHalSpiBusHandle* spi_bus_handle;
+    const FuriHalSpiBusHandle* spi_bus_handle;
     const GpioPin* g0_pin;
     SubGhzDeviceCC1101ExtAsyncTx async_tx;
     SubGhzDeviceCC1101ExtAsyncRx async_rx;
diff --git a/applications/services/cli/cli.c b/applications/services/cli/cli.c
index 28ba417c2..c2a0b9cb1 100644
--- a/applications/services/cli/cli.c
+++ b/applications/services/cli/cli.c
@@ -424,7 +424,7 @@ void cli_delete_command(Cli* cli, const char* name) {
     furi_string_free(name_str);
 }
 
-void cli_session_open(Cli* cli, void* session) {
+void cli_session_open(Cli* cli, const void* session) {
     furi_check(cli);
 
     furi_check(furi_mutex_acquire(cli->mutex, FuriWaitForever) == FuriStatusOk);
diff --git a/applications/services/cli/cli.h b/applications/services/cli/cli.h
index bb84670a7..fe8f09032 100644
--- a/applications/services/cli/cli.h
+++ b/applications/services/cli/cli.h
@@ -123,7 +123,7 @@ char cli_getc(Cli* cli);
  */
 void cli_nl(Cli* cli);
 
-void cli_session_open(Cli* cli, void* session);
+void cli_session_open(Cli* cli, const void* session);
 
 void cli_session_close(Cli* cli);
 
diff --git a/applications/services/cli/cli_i.h b/applications/services/cli/cli_i.h
index d7351b9ff..ca126dacd 100644
--- a/applications/services/cli/cli_i.h
+++ b/applications/services/cli/cli_i.h
@@ -50,7 +50,7 @@ struct Cli {
     FuriSemaphore* idle_sem;
     FuriString* last_line;
     FuriString* line;
-    CliSession* session;
+    const CliSession* session;
 
     size_t cursor_position;
 };
diff --git a/applications/services/cli/cli_vcp.c b/applications/services/cli/cli_vcp.c
index aa399e78a..39802bd79 100644
--- a/applications/services/cli/cli_vcp.c
+++ b/applications/services/cli/cli_vcp.c
@@ -312,7 +312,7 @@ static bool cli_vcp_is_connected(void) {
     return vcp->connected;
 }
 
-CliSession cli_vcp = {
+const CliSession cli_vcp = {
     cli_vcp_init,
     cli_vcp_deinit,
     cli_vcp_rx,
diff --git a/applications/services/cli/cli_vcp.h b/applications/services/cli/cli_vcp.h
index 3aef2ef70..f51625342 100644
--- a/applications/services/cli/cli_vcp.h
+++ b/applications/services/cli/cli_vcp.h
@@ -11,7 +11,7 @@ extern "C" {
 
 typedef struct CliSession CliSession;
 
-extern CliSession cli_vcp;
+extern const CliSession cli_vcp;
 
 #ifdef __cplusplus
 }
diff --git a/lib/drivers/bq25896.c b/lib/drivers/bq25896.c
index 76aae5e82..a44ff8c39 100644
--- a/lib/drivers/bq25896.c
+++ b/lib/drivers/bq25896.c
@@ -35,7 +35,7 @@ typedef struct {
 
 static bq25896_regs_t bq25896_regs;
 
-bool bq25896_init(FuriHalI2cBusHandle* handle) {
+bool bq25896_init(const FuriHalI2cBusHandle* handle) {
     bool result = true;
 
     bq25896_regs.r14.REG_RST = 1;
@@ -78,19 +78,19 @@ bool bq25896_init(FuriHalI2cBusHandle* handle) {
     return result;
 }
 
-void bq25896_set_boost_lim(FuriHalI2cBusHandle* handle, BoostLim boost_lim) {
+void bq25896_set_boost_lim(const FuriHalI2cBusHandle* handle, BoostLim boost_lim) {
     bq25896_regs.r0A.BOOST_LIM = boost_lim;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x0A, *(uint8_t*)&bq25896_regs.r0A, BQ25896_I2C_TIMEOUT);
 }
 
-void bq25896_poweroff(FuriHalI2cBusHandle* handle) {
+void bq25896_poweroff(const FuriHalI2cBusHandle* handle) {
     bq25896_regs.r09.BATFET_DIS = 1;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x09, *(uint8_t*)&bq25896_regs.r09, BQ25896_I2C_TIMEOUT);
 }
 
-ChrgStat bq25896_get_charge_status(FuriHalI2cBusHandle* handle) {
+ChrgStat bq25896_get_charge_status(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_mem(
         handle,
         BQ25896_ADDRESS,
@@ -103,52 +103,52 @@ ChrgStat bq25896_get_charge_status(FuriHalI2cBusHandle* handle) {
     return bq25896_regs.r0B.CHRG_STAT;
 }
 
-bool bq25896_is_charging(FuriHalI2cBusHandle* handle) {
+bool bq25896_is_charging(const FuriHalI2cBusHandle* handle) {
     // Include precharge, fast charging, and charging termination done as "charging"
     return bq25896_get_charge_status(handle) != ChrgStatNo;
 }
 
-bool bq25896_is_charging_done(FuriHalI2cBusHandle* handle) {
+bool bq25896_is_charging_done(const FuriHalI2cBusHandle* handle) {
     return bq25896_get_charge_status(handle) == ChrgStatDone;
 }
 
-void bq25896_enable_charging(FuriHalI2cBusHandle* handle) {
+void bq25896_enable_charging(const FuriHalI2cBusHandle* handle) {
     bq25896_regs.r03.CHG_CONFIG = 1;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x03, *(uint8_t*)&bq25896_regs.r03, BQ25896_I2C_TIMEOUT);
 }
 
-void bq25896_disable_charging(FuriHalI2cBusHandle* handle) {
+void bq25896_disable_charging(const FuriHalI2cBusHandle* handle) {
     bq25896_regs.r03.CHG_CONFIG = 0;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x03, *(uint8_t*)&bq25896_regs.r03, BQ25896_I2C_TIMEOUT);
 }
 
-void bq25896_enable_otg(FuriHalI2cBusHandle* handle) {
+void bq25896_enable_otg(const FuriHalI2cBusHandle* handle) {
     bq25896_regs.r03.OTG_CONFIG = 1;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x03, *(uint8_t*)&bq25896_regs.r03, BQ25896_I2C_TIMEOUT);
 }
 
-void bq25896_disable_otg(FuriHalI2cBusHandle* handle) {
+void bq25896_disable_otg(const FuriHalI2cBusHandle* handle) {
     bq25896_regs.r03.OTG_CONFIG = 0;
     furi_hal_i2c_write_reg_8(
         handle, BQ25896_ADDRESS, 0x03, *(uint8_t*)&bq25896_regs.r03, BQ25896_I2C_TIMEOUT);
 }
 
-bool bq25896_is_otg_enabled(FuriHalI2cBusHandle* handle) {
+bool bq25896_is_otg_enabled(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x03, (uint8_t*)&bq25896_regs.r03, BQ25896_I2C_TIMEOUT);
     return bq25896_regs.r03.OTG_CONFIG;
 }
 
-uint16_t bq25896_get_vreg_voltage(FuriHalI2cBusHandle* handle) {
+uint16_t bq25896_get_vreg_voltage(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x06, (uint8_t*)&bq25896_regs.r06, BQ25896_I2C_TIMEOUT);
     return (uint16_t)bq25896_regs.r06.VREG * 16 + 3840;
 }
 
-void bq25896_set_vreg_voltage(FuriHalI2cBusHandle* handle, uint16_t vreg_voltage) {
+void bq25896_set_vreg_voltage(const FuriHalI2cBusHandle* handle, uint16_t vreg_voltage) {
     if(vreg_voltage < 3840) {
         // Minimum valid value is 3840 mV
         vreg_voltage = 3840;
@@ -166,13 +166,13 @@ void bq25896_set_vreg_voltage(FuriHalI2cBusHandle* handle, uint16_t vreg_voltage
         handle, BQ25896_ADDRESS, 0x06, *(uint8_t*)&bq25896_regs.r06, BQ25896_I2C_TIMEOUT);
 }
 
-bool bq25896_check_otg_fault(FuriHalI2cBusHandle* handle) {
+bool bq25896_check_otg_fault(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x0C, (uint8_t*)&bq25896_regs.r0C, BQ25896_I2C_TIMEOUT);
     return bq25896_regs.r0C.BOOST_FAULT;
 }
 
-uint16_t bq25896_get_vbus_voltage(FuriHalI2cBusHandle* handle) {
+uint16_t bq25896_get_vbus_voltage(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x11, (uint8_t*)&bq25896_regs.r11, BQ25896_I2C_TIMEOUT);
     if(bq25896_regs.r11.VBUS_GD) {
@@ -182,25 +182,25 @@ uint16_t bq25896_get_vbus_voltage(FuriHalI2cBusHandle* handle) {
     }
 }
 
-uint16_t bq25896_get_vsys_voltage(FuriHalI2cBusHandle* handle) {
+uint16_t bq25896_get_vsys_voltage(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x0F, (uint8_t*)&bq25896_regs.r0F, BQ25896_I2C_TIMEOUT);
     return (uint16_t)bq25896_regs.r0F.SYSV * 20 + 2304;
 }
 
-uint16_t bq25896_get_vbat_voltage(FuriHalI2cBusHandle* handle) {
+uint16_t bq25896_get_vbat_voltage(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x0E, (uint8_t*)&bq25896_regs.r0E, BQ25896_I2C_TIMEOUT);
     return (uint16_t)bq25896_regs.r0E.BATV * 20 + 2304;
 }
 
-uint16_t bq25896_get_vbat_current(FuriHalI2cBusHandle* handle) {
+uint16_t bq25896_get_vbat_current(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x12, (uint8_t*)&bq25896_regs.r12, BQ25896_I2C_TIMEOUT);
     return (uint16_t)bq25896_regs.r12.ICHGR * 50;
 }
 
-uint32_t bq25896_get_ntc_mpct(FuriHalI2cBusHandle* handle) {
+uint32_t bq25896_get_ntc_mpct(const FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_read_reg_8(
         handle, BQ25896_ADDRESS, 0x10, (uint8_t*)&bq25896_regs.r10, BQ25896_I2C_TIMEOUT);
     return (uint32_t)bq25896_regs.r10.TSPCT * 465 + 21000;
diff --git a/lib/drivers/bq25896.h b/lib/drivers/bq25896.h
index d35625ab3..69c19868c 100644
--- a/lib/drivers/bq25896.h
+++ b/lib/drivers/bq25896.h
@@ -7,61 +7,61 @@
 #include <furi_hal_i2c.h>
 
 /** Initialize Driver */
-bool bq25896_init(FuriHalI2cBusHandle* handle);
+bool bq25896_init(const FuriHalI2cBusHandle* handle);
 
 /** Set boost lim*/
-void bq25896_set_boost_lim(FuriHalI2cBusHandle* handle, BoostLim boost_lim);
+void bq25896_set_boost_lim(const FuriHalI2cBusHandle* handle, BoostLim boost_lim);
 
 /** Send device into shipping mode */
-void bq25896_poweroff(FuriHalI2cBusHandle* handle);
+void bq25896_poweroff(const FuriHalI2cBusHandle* handle);
 
 /** Get charging status */
-ChrgStat bq25896_get_charge_status(FuriHalI2cBusHandle* handle);
+ChrgStat bq25896_get_charge_status(const FuriHalI2cBusHandle* handle);
 
 /** Is currently charging */
-bool bq25896_is_charging(FuriHalI2cBusHandle* handle);
+bool bq25896_is_charging(const FuriHalI2cBusHandle* handle);
 
 /** Is charging completed while connected to charger */
-bool bq25896_is_charging_done(FuriHalI2cBusHandle* handle);
+bool bq25896_is_charging_done(const FuriHalI2cBusHandle* handle);
 
 /** Enable charging */
-void bq25896_enable_charging(FuriHalI2cBusHandle* handle);
+void bq25896_enable_charging(const FuriHalI2cBusHandle* handle);
 
 /** Disable charging */
-void bq25896_disable_charging(FuriHalI2cBusHandle* handle);
+void bq25896_disable_charging(const FuriHalI2cBusHandle* handle);
 
 /** Enable otg */
-void bq25896_enable_otg(FuriHalI2cBusHandle* handle);
+void bq25896_enable_otg(const FuriHalI2cBusHandle* handle);
 
 /** Disable otg */
-void bq25896_disable_otg(FuriHalI2cBusHandle* handle);
+void bq25896_disable_otg(const FuriHalI2cBusHandle* handle);
 
 /** Is otg enabled */
-bool bq25896_is_otg_enabled(FuriHalI2cBusHandle* handle);
+bool bq25896_is_otg_enabled(const FuriHalI2cBusHandle* handle);
 
 /** Get VREG (charging limit) voltage in mV */
-uint16_t bq25896_get_vreg_voltage(FuriHalI2cBusHandle* handle);
+uint16_t bq25896_get_vreg_voltage(const FuriHalI2cBusHandle* handle);
 
 /** Set VREG (charging limit) voltage in mV
  *
  * Valid range: 3840mV - 4208mV, in steps of 16mV
  */
-void bq25896_set_vreg_voltage(FuriHalI2cBusHandle* handle, uint16_t vreg_voltage);
+void bq25896_set_vreg_voltage(const FuriHalI2cBusHandle* handle, uint16_t vreg_voltage);
 
 /** Check OTG BOOST Fault status */
-bool bq25896_check_otg_fault(FuriHalI2cBusHandle* handle);
+bool bq25896_check_otg_fault(const FuriHalI2cBusHandle* handle);
 
 /** Get VBUS Voltage in mV */
-uint16_t bq25896_get_vbus_voltage(FuriHalI2cBusHandle* handle);
+uint16_t bq25896_get_vbus_voltage(const FuriHalI2cBusHandle* handle);
 
 /** Get VSYS Voltage in mV */
-uint16_t bq25896_get_vsys_voltage(FuriHalI2cBusHandle* handle);
+uint16_t bq25896_get_vsys_voltage(const FuriHalI2cBusHandle* handle);
 
 /** Get VBAT Voltage in mV */
-uint16_t bq25896_get_vbat_voltage(FuriHalI2cBusHandle* handle);
+uint16_t bq25896_get_vbat_voltage(const FuriHalI2cBusHandle* handle);
 
 /** Get VBAT current in mA */
-uint16_t bq25896_get_vbat_current(FuriHalI2cBusHandle* handle);
+uint16_t bq25896_get_vbat_current(const FuriHalI2cBusHandle* handle);
 
 /** Get NTC voltage in mpct of REGN */
-uint32_t bq25896_get_ntc_mpct(FuriHalI2cBusHandle* handle);
+uint32_t bq25896_get_ntc_mpct(const FuriHalI2cBusHandle* handle);
diff --git a/lib/drivers/bq27220.c b/lib/drivers/bq27220.c
index d60e287da..127f7c6b9 100644
--- a/lib/drivers/bq27220.c
+++ b/lib/drivers/bq27220.c
@@ -43,7 +43,7 @@
 #endif
 
 static inline bool bq27220_read_reg(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     uint8_t* buffer,
     size_t buffer_size) {
@@ -52,7 +52,7 @@ static inline bool bq27220_read_reg(
 }
 
 static inline bool bq27220_write(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     const uint8_t* buffer,
     size_t buffer_size) {
@@ -60,11 +60,11 @@ static inline bool bq27220_write(
         handle, BQ27220_ADDRESS, address, buffer, buffer_size, BQ27220_I2C_TIMEOUT);
 }
 
-static inline bool bq27220_control(FuriHalI2cBusHandle* handle, uint16_t control) {
+static inline bool bq27220_control(const FuriHalI2cBusHandle* handle, uint16_t control) {
     return bq27220_write(handle, CommandControl, (uint8_t*)&control, 2);
 }
 
-static uint16_t bq27220_read_word(FuriHalI2cBusHandle* handle, uint8_t address) {
+static uint16_t bq27220_read_word(const FuriHalI2cBusHandle* handle, uint8_t address) {
     uint16_t buf = BQ27220_ERROR;
 
     if(!bq27220_read_reg(handle, address, (uint8_t*)&buf, 2)) {
@@ -83,7 +83,7 @@ static uint8_t bq27220_get_checksum(uint8_t* data, uint16_t len) {
 }
 
 static bool bq27220_parameter_check(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint16_t address,
     uint32_t value,
     size_t size,
@@ -163,7 +163,7 @@ static bool bq27220_parameter_check(
 }
 
 static bool bq27220_data_memory_check(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     const BQ27220DMData* data_memory,
     bool update) {
     if(update) {
@@ -268,7 +268,7 @@ static bool bq27220_data_memory_check(
     return result;
 }
 
-bool bq27220_init(FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory) {
+bool bq27220_init(const FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory) {
     bool result = false;
     bool reset_and_provisioning_required = false;
 
@@ -365,7 +365,7 @@ bool bq27220_init(FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory)
     return result;
 }
 
-bool bq27220_reset(FuriHalI2cBusHandle* handle) {
+bool bq27220_reset(const FuriHalI2cBusHandle* handle) {
     bool result = false;
     do {
         if(!bq27220_control(handle, Control_RESET)) {
@@ -396,7 +396,7 @@ bool bq27220_reset(FuriHalI2cBusHandle* handle) {
     return result;
 }
 
-bool bq27220_seal(FuriHalI2cBusHandle* handle) {
+bool bq27220_seal(const FuriHalI2cBusHandle* handle) {
     Bq27220OperationStatus operation_status = {0};
     bool result = false;
     do {
@@ -431,7 +431,7 @@ bool bq27220_seal(FuriHalI2cBusHandle* handle) {
     return result;
 }
 
-bool bq27220_unseal(FuriHalI2cBusHandle* handle) {
+bool bq27220_unseal(const FuriHalI2cBusHandle* handle) {
     Bq27220OperationStatus operation_status = {0};
     bool result = false;
     do {
@@ -465,7 +465,7 @@ bool bq27220_unseal(FuriHalI2cBusHandle* handle) {
     return result;
 }
 
-bool bq27220_full_access(FuriHalI2cBusHandle* handle) {
+bool bq27220_full_access(const FuriHalI2cBusHandle* handle) {
     bool result = false;
 
     do {
@@ -518,29 +518,35 @@ bool bq27220_full_access(FuriHalI2cBusHandle* handle) {
     return result;
 }
 
-uint16_t bq27220_get_voltage(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_voltage(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandVoltage);
 }
 
-int16_t bq27220_get_current(FuriHalI2cBusHandle* handle) {
+int16_t bq27220_get_current(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandCurrent);
 }
 
-bool bq27220_get_control_status(FuriHalI2cBusHandle* handle, Bq27220ControlStatus* control_status) {
+bool bq27220_get_control_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220ControlStatus* control_status) {
     return bq27220_read_reg(handle, CommandControl, (uint8_t*)control_status, 2);
 }
 
-bool bq27220_get_battery_status(FuriHalI2cBusHandle* handle, Bq27220BatteryStatus* battery_status) {
+bool bq27220_get_battery_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220BatteryStatus* battery_status) {
     return bq27220_read_reg(handle, CommandBatteryStatus, (uint8_t*)battery_status, 2);
 }
 
 bool bq27220_get_operation_status(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     Bq27220OperationStatus* operation_status) {
     return bq27220_read_reg(handle, CommandOperationStatus, (uint8_t*)operation_status, 2);
 }
 
-bool bq27220_get_gauging_status(FuriHalI2cBusHandle* handle, Bq27220GaugingStatus* gauging_status) {
+bool bq27220_get_gauging_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220GaugingStatus* gauging_status) {
     // Request gauging data to be loaded to MAC
     if(!bq27220_control(handle, Control_GAUGING_STATUS)) {
         FURI_LOG_E(TAG, "DM SelectSubclass for read failed");
@@ -552,26 +558,26 @@ bool bq27220_get_gauging_status(FuriHalI2cBusHandle* handle, Bq27220GaugingStatu
     return bq27220_read_reg(handle, CommandMACData, (uint8_t*)gauging_status, 2);
 }
 
-uint16_t bq27220_get_temperature(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_temperature(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandTemperature);
 }
 
-uint16_t bq27220_get_full_charge_capacity(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_full_charge_capacity(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandFullChargeCapacity);
 }
 
-uint16_t bq27220_get_design_capacity(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_design_capacity(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandDesignCapacity);
 }
 
-uint16_t bq27220_get_remaining_capacity(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_remaining_capacity(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandRemainingCapacity);
 }
 
-uint16_t bq27220_get_state_of_charge(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_state_of_charge(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandStateOfCharge);
 }
 
-uint16_t bq27220_get_state_of_health(FuriHalI2cBusHandle* handle) {
+uint16_t bq27220_get_state_of_health(const FuriHalI2cBusHandle* handle) {
     return bq27220_read_word(handle, CommandStateOfHealth);
 }
diff --git a/lib/drivers/bq27220.h b/lib/drivers/bq27220.h
index cdfcb20b1..addbf08f5 100644
--- a/lib/drivers/bq27220.h
+++ b/lib/drivers/bq27220.h
@@ -136,7 +136,7 @@ typedef struct BQ27220DMData BQ27220DMData;
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_init(FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory);
+bool bq27220_init(const FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory);
 
 /** Reset gauge
  *
@@ -144,7 +144,7 @@ bool bq27220_init(FuriHalI2cBusHandle* handle, const BQ27220DMData* data_memory)
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_reset(FuriHalI2cBusHandle* handle);
+bool bq27220_reset(const FuriHalI2cBusHandle* handle);
 
 /** Seal gauge access
  *
@@ -152,7 +152,7 @@ bool bq27220_reset(FuriHalI2cBusHandle* handle);
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_seal(FuriHalI2cBusHandle* handle);
+bool bq27220_seal(const FuriHalI2cBusHandle* handle);
 
 /** Unseal gauge access
  *
@@ -160,7 +160,7 @@ bool bq27220_seal(FuriHalI2cBusHandle* handle);
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_unseal(FuriHalI2cBusHandle* handle);
+bool bq27220_unseal(const FuriHalI2cBusHandle* handle);
 
 /** Get full access
  *
@@ -170,7 +170,7 @@ bool bq27220_unseal(FuriHalI2cBusHandle* handle);
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_full_access(FuriHalI2cBusHandle* handle);
+bool bq27220_full_access(const FuriHalI2cBusHandle* handle);
 
 /** Get battery voltage
  *
@@ -178,7 +178,7 @@ bool bq27220_full_access(FuriHalI2cBusHandle* handle);
  *
  * @return     voltage in mV or BQ27220_ERROR
  */
-uint16_t bq27220_get_voltage(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_voltage(const FuriHalI2cBusHandle* handle);
 
 /** Get current
  *
@@ -186,7 +186,7 @@ uint16_t bq27220_get_voltage(FuriHalI2cBusHandle* handle);
  *
  * @return     current in mA or BQ27220_ERROR
  */
-int16_t bq27220_get_current(FuriHalI2cBusHandle* handle);
+int16_t bq27220_get_current(const FuriHalI2cBusHandle* handle);
 
 /** Get control status
  *
@@ -195,7 +195,9 @@ int16_t bq27220_get_current(FuriHalI2cBusHandle* handle);
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_get_control_status(FuriHalI2cBusHandle* handle, Bq27220ControlStatus* control_status);
+bool bq27220_get_control_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220ControlStatus* control_status);
 
 /** Get battery status
  *
@@ -204,7 +206,9 @@ bool bq27220_get_control_status(FuriHalI2cBusHandle* handle, Bq27220ControlStatu
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_get_battery_status(FuriHalI2cBusHandle* handle, Bq27220BatteryStatus* battery_status);
+bool bq27220_get_battery_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220BatteryStatus* battery_status);
 
 /** Get operation status
  *
@@ -214,7 +218,7 @@ bool bq27220_get_battery_status(FuriHalI2cBusHandle* handle, Bq27220BatteryStatu
  * @return     true on success, false otherwise
  */
 bool bq27220_get_operation_status(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     Bq27220OperationStatus* operation_status);
 
 /** Get gauging status
@@ -224,7 +228,9 @@ bool bq27220_get_operation_status(
  *
  * @return     true on success, false otherwise
  */
-bool bq27220_get_gauging_status(FuriHalI2cBusHandle* handle, Bq27220GaugingStatus* gauging_status);
+bool bq27220_get_gauging_status(
+    const FuriHalI2cBusHandle* handle,
+    Bq27220GaugingStatus* gauging_status);
 
 /** Get temperature
  *
@@ -232,7 +238,7 @@ bool bq27220_get_gauging_status(FuriHalI2cBusHandle* handle, Bq27220GaugingStatu
  *
  * @return     temperature in units of 0.1°K
  */
-uint16_t bq27220_get_temperature(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_temperature(const FuriHalI2cBusHandle* handle);
 
 /** Get compensated full charge capacity
  *
@@ -240,7 +246,7 @@ uint16_t bq27220_get_temperature(FuriHalI2cBusHandle* handle);
  *
  * @return     full charge capacity in mAh or BQ27220_ERROR
  */
-uint16_t bq27220_get_full_charge_capacity(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_full_charge_capacity(const FuriHalI2cBusHandle* handle);
 
 /** Get design capacity
  *
@@ -248,7 +254,7 @@ uint16_t bq27220_get_full_charge_capacity(FuriHalI2cBusHandle* handle);
  *
  * @return     design capacity in mAh or BQ27220_ERROR
  */
-uint16_t bq27220_get_design_capacity(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_design_capacity(const FuriHalI2cBusHandle* handle);
 
 /** Get remaining capacity
  *
@@ -256,7 +262,7 @@ uint16_t bq27220_get_design_capacity(FuriHalI2cBusHandle* handle);
  *
  * @return     remaining capacity in mAh or BQ27220_ERROR
  */
-uint16_t bq27220_get_remaining_capacity(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_remaining_capacity(const FuriHalI2cBusHandle* handle);
 
 /** Get predicted remaining battery capacity
  *
@@ -264,7 +270,7 @@ uint16_t bq27220_get_remaining_capacity(FuriHalI2cBusHandle* handle);
  *
  * @return     state of charge in percents or BQ27220_ERROR
  */
-uint16_t bq27220_get_state_of_charge(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_state_of_charge(const FuriHalI2cBusHandle* handle);
 
 /** Get ratio of full charge capacity over design capacity
  *
@@ -272,4 +278,4 @@ uint16_t bq27220_get_state_of_charge(FuriHalI2cBusHandle* handle);
  *
  * @return     state of health in percents or BQ27220_ERROR
  */
-uint16_t bq27220_get_state_of_health(FuriHalI2cBusHandle* handle);
+uint16_t bq27220_get_state_of_health(const FuriHalI2cBusHandle* handle);
diff --git a/lib/drivers/cc1101.c b/lib/drivers/cc1101.c
index 40b286a9b..ff2f0d610 100644
--- a/lib/drivers/cc1101.c
+++ b/lib/drivers/cc1101.c
@@ -3,7 +3,8 @@
 #include <string.h>
 #include <furi_hal_cortex.h>
 
-static bool cc1101_spi_trx(FuriHalSpiBusHandle* handle, uint8_t* tx, uint8_t* rx, uint8_t size) {
+static bool
+    cc1101_spi_trx(const FuriHalSpiBusHandle* handle, uint8_t* tx, uint8_t* rx, uint8_t size) {
     FuriHalCortexTimer timer = furi_hal_cortex_timer_get(CC1101_TIMEOUT * 1000);
 
     while(furi_hal_gpio_read(handle->miso)) {
@@ -16,7 +17,7 @@ static bool cc1101_spi_trx(FuriHalSpiBusHandle* handle, uint8_t* tx, uint8_t* rx
     return true;
 }
 
-CC1101Status cc1101_strobe(FuriHalSpiBusHandle* handle, uint8_t strobe) {
+CC1101Status cc1101_strobe(const FuriHalSpiBusHandle* handle, uint8_t strobe) {
     uint8_t tx[1] = {strobe};
     CC1101Status rx[1] = {0};
     rx[0].CHIP_RDYn = 1;
@@ -27,7 +28,7 @@ CC1101Status cc1101_strobe(FuriHalSpiBusHandle* handle, uint8_t strobe) {
     return rx[0];
 }
 
-CC1101Status cc1101_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t data) {
+CC1101Status cc1101_write_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t data) {
     uint8_t tx[2] = {reg, data};
     CC1101Status rx[2] = {0};
     rx[0].CHIP_RDYn = 1;
@@ -39,7 +40,7 @@ CC1101Status cc1101_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
     return rx[1];
 }
 
-CC1101Status cc1101_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* data) {
+CC1101Status cc1101_read_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* data) {
     assert(sizeof(CC1101Status) == 1);
     uint8_t tx[2] = {reg | CC1101_READ, 0};
     CC1101Status rx[2] = {0};
@@ -52,33 +53,36 @@ CC1101Status cc1101_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t*
     return rx[0];
 }
 
-uint8_t cc1101_get_partnumber(FuriHalSpiBusHandle* handle) {
+uint8_t cc1101_get_partnumber(const FuriHalSpiBusHandle* handle) {
     uint8_t partnumber = 0;
     cc1101_read_reg(handle, CC1101_STATUS_PARTNUM | CC1101_BURST, &partnumber);
     return partnumber;
 }
 
-uint8_t cc1101_get_version(FuriHalSpiBusHandle* handle) {
+uint8_t cc1101_get_version(const FuriHalSpiBusHandle* handle) {
     uint8_t version = 0;
     cc1101_read_reg(handle, CC1101_STATUS_VERSION | CC1101_BURST, &version);
     return version;
 }
 
-uint8_t cc1101_get_rssi(FuriHalSpiBusHandle* handle) {
+uint8_t cc1101_get_rssi(const FuriHalSpiBusHandle* handle) {
     uint8_t rssi = 0;
     cc1101_read_reg(handle, CC1101_STATUS_RSSI | CC1101_BURST, &rssi);
     return rssi;
 }
 
-CC1101Status cc1101_reset(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_reset(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SRES);
 }
 
-CC1101Status cc1101_get_status(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_get_status(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SNOP);
 }
 
-bool cc1101_wait_status_state(FuriHalSpiBusHandle* handle, CC1101State state, uint32_t timeout_us) {
+bool cc1101_wait_status_state(
+    const FuriHalSpiBusHandle* handle,
+    CC1101State state,
+    uint32_t timeout_us) {
     bool result = false;
     CC1101Status status = {0};
     FuriHalCortexTimer timer = furi_hal_cortex_timer_get(timeout_us);
@@ -92,35 +96,35 @@ bool cc1101_wait_status_state(FuriHalSpiBusHandle* handle, CC1101State state, ui
     return result;
 }
 
-CC1101Status cc1101_shutdown(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_shutdown(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SPWD);
 }
 
-CC1101Status cc1101_calibrate(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_calibrate(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SCAL);
 }
 
-CC1101Status cc1101_switch_to_idle(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_switch_to_idle(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SIDLE);
 }
 
-CC1101Status cc1101_switch_to_rx(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_switch_to_rx(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SRX);
 }
 
-CC1101Status cc1101_switch_to_tx(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_switch_to_tx(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_STX);
 }
 
-CC1101Status cc1101_flush_rx(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_flush_rx(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SFRX);
 }
 
-CC1101Status cc1101_flush_tx(FuriHalSpiBusHandle* handle) {
+CC1101Status cc1101_flush_tx(const FuriHalSpiBusHandle* handle) {
     return cc1101_strobe(handle, CC1101_STROBE_SFTX);
 }
 
-uint32_t cc1101_set_frequency(FuriHalSpiBusHandle* handle, uint32_t value) {
+uint32_t cc1101_set_frequency(const FuriHalSpiBusHandle* handle, uint32_t value) {
     uint64_t real_value = (uint64_t)value * CC1101_FDIV / CC1101_QUARTZ;
 
     // Sanity check
@@ -135,7 +139,7 @@ uint32_t cc1101_set_frequency(FuriHalSpiBusHandle* handle, uint32_t value) {
     return (uint32_t)real_frequency;
 }
 
-uint32_t cc1101_set_intermediate_frequency(FuriHalSpiBusHandle* handle, uint32_t value) {
+uint32_t cc1101_set_intermediate_frequency(const FuriHalSpiBusHandle* handle, uint32_t value) {
     uint64_t real_value = value * CC1101_IFDIV / CC1101_QUARTZ;
     assert((real_value & 0xFF) == real_value);
 
@@ -146,7 +150,7 @@ uint32_t cc1101_set_intermediate_frequency(FuriHalSpiBusHandle* handle, uint32_t
     return (uint32_t)real_frequency;
 }
 
-void cc1101_set_pa_table(FuriHalSpiBusHandle* handle, const uint8_t value[8]) {
+void cc1101_set_pa_table(const FuriHalSpiBusHandle* handle, const uint8_t value[8]) {
     uint8_t tx[9] = {CC1101_PATABLE | CC1101_BURST}; //-V1009
     CC1101Status rx[9] = {0};
     rx[0].CHIP_RDYn = 1;
@@ -159,7 +163,7 @@ void cc1101_set_pa_table(FuriHalSpiBusHandle* handle, const uint8_t value[8]) {
     assert((rx[0].CHIP_RDYn | rx[8].CHIP_RDYn) == 0);
 }
 
-uint8_t cc1101_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* data, uint8_t size) {
+uint8_t cc1101_write_fifo(const FuriHalSpiBusHandle* handle, const uint8_t* data, uint8_t size) {
     uint8_t buff_tx[64];
     uint8_t buff_rx[64];
     buff_tx[0] = CC1101_FIFO | CC1101_BURST;
@@ -170,7 +174,7 @@ uint8_t cc1101_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* data, uint
     return size;
 }
 
-uint8_t cc1101_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* data, uint8_t* size) {
+uint8_t cc1101_read_fifo(const FuriHalSpiBusHandle* handle, uint8_t* data, uint8_t* size) {
     uint8_t buff_trx[2];
     buff_trx[0] = CC1101_FIFO | CC1101_READ | CC1101_BURST;
 
diff --git a/lib/drivers/cc1101.h b/lib/drivers/cc1101.h
index c8c552bec..2828f1cdf 100644
--- a/lib/drivers/cc1101.h
+++ b/lib/drivers/cc1101.h
@@ -19,7 +19,7 @@ extern "C" {
  *
  * @return     device status
  */
-CC1101Status cc1101_strobe(FuriHalSpiBusHandle* handle, uint8_t strobe);
+CC1101Status cc1101_strobe(const FuriHalSpiBusHandle* handle, uint8_t strobe);
 
 /** Write device register
  *
@@ -29,7 +29,7 @@ CC1101Status cc1101_strobe(FuriHalSpiBusHandle* handle, uint8_t strobe);
  *
  * @return     device status
  */
-CC1101Status cc1101_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t data);
+CC1101Status cc1101_write_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t data);
 
 /** Read device register
  *
@@ -39,7 +39,7 @@ CC1101Status cc1101_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
  *
  * @return     device status
  */
-CC1101Status cc1101_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* data);
+CC1101Status cc1101_read_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* data);
 
 /* High level API */
 
@@ -49,7 +49,7 @@ CC1101Status cc1101_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t*
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_reset(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_reset(const FuriHalSpiBusHandle* handle);
 
 /** Get status
  *
@@ -57,7 +57,7 @@ CC1101Status cc1101_reset(FuriHalSpiBusHandle* handle);
  *
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_get_status(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_get_status(const FuriHalSpiBusHandle* handle);
 
 /** Wait specific chip state
  *
@@ -67,7 +67,10 @@ CC1101Status cc1101_get_status(FuriHalSpiBusHandle* handle);
  *
  * @return     true on success, false otherwise
  */
-bool cc1101_wait_status_state(FuriHalSpiBusHandle* handle, CC1101State state, uint32_t timeout_us);
+bool cc1101_wait_status_state(
+    const FuriHalSpiBusHandle* handle,
+    CC1101State state,
+    uint32_t timeout_us);
 
 /** Enable shutdown mode
  *
@@ -75,7 +78,7 @@ bool cc1101_wait_status_state(FuriHalSpiBusHandle* handle, CC1101State state, ui
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_shutdown(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_shutdown(const FuriHalSpiBusHandle* handle);
 
 /** Get Partnumber
  *
@@ -83,7 +86,7 @@ CC1101Status cc1101_shutdown(FuriHalSpiBusHandle* handle);
  *
  * @return     part number id
  */
-uint8_t cc1101_get_partnumber(FuriHalSpiBusHandle* handle);
+uint8_t cc1101_get_partnumber(const FuriHalSpiBusHandle* handle);
 
 /** Get Version
  *
@@ -91,7 +94,7 @@ uint8_t cc1101_get_partnumber(FuriHalSpiBusHandle* handle);
  *
  * @return     version
  */
-uint8_t cc1101_get_version(FuriHalSpiBusHandle* handle);
+uint8_t cc1101_get_version(const FuriHalSpiBusHandle* handle);
 
 /** Get raw RSSI value
  *
@@ -99,7 +102,7 @@ uint8_t cc1101_get_version(FuriHalSpiBusHandle* handle);
  *
  * @return     rssi value
  */
-uint8_t cc1101_get_rssi(FuriHalSpiBusHandle* handle);
+uint8_t cc1101_get_rssi(const FuriHalSpiBusHandle* handle);
 
 /** Calibrate oscillator
  *
@@ -107,13 +110,13 @@ uint8_t cc1101_get_rssi(FuriHalSpiBusHandle* handle);
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_calibrate(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_calibrate(const FuriHalSpiBusHandle* handle);
 
 /** Switch to idle
  *
  * @param      handle  - pointer to FuriHalSpiHandle
  */
-CC1101Status cc1101_switch_to_idle(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_switch_to_idle(const FuriHalSpiBusHandle* handle);
 
 /** Switch to RX
  *
@@ -121,7 +124,7 @@ CC1101Status cc1101_switch_to_idle(FuriHalSpiBusHandle* handle);
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_switch_to_rx(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_switch_to_rx(const FuriHalSpiBusHandle* handle);
 
 /** Switch to TX
  *
@@ -129,7 +132,7 @@ CC1101Status cc1101_switch_to_rx(FuriHalSpiBusHandle* handle);
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_switch_to_tx(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_switch_to_tx(const FuriHalSpiBusHandle* handle);
 
 /** Flush RX FIFO
  *
@@ -137,13 +140,13 @@ CC1101Status cc1101_switch_to_tx(FuriHalSpiBusHandle* handle);
  * 
  * @return     CC1101Status structure
  */
-CC1101Status cc1101_flush_rx(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_flush_rx(const FuriHalSpiBusHandle* handle);
 
 /** Flush TX FIFO
  *
  * @param      handle  - pointer to FuriHalSpiHandle
  */
-CC1101Status cc1101_flush_tx(FuriHalSpiBusHandle* handle);
+CC1101Status cc1101_flush_tx(const FuriHalSpiBusHandle* handle);
 
 /** Set Frequency
  *
@@ -152,7 +155,7 @@ CC1101Status cc1101_flush_tx(FuriHalSpiBusHandle* handle);
  *
  * @return     real frequency that were synthesized
  */
-uint32_t cc1101_set_frequency(FuriHalSpiBusHandle* handle, uint32_t value);
+uint32_t cc1101_set_frequency(const FuriHalSpiBusHandle* handle, uint32_t value);
 
 /** Set Intermediate Frequency
  *
@@ -161,14 +164,14 @@ uint32_t cc1101_set_frequency(FuriHalSpiBusHandle* handle, uint32_t value);
  *
  * @return     real inermediate frequency that were synthesized
  */
-uint32_t cc1101_set_intermediate_frequency(FuriHalSpiBusHandle* handle, uint32_t value);
+uint32_t cc1101_set_intermediate_frequency(const FuriHalSpiBusHandle* handle, uint32_t value);
 
 /** Set Power Amplifier level table, ramp
  *
  * @param      handle  - pointer to FuriHalSpiHandle
  * @param      value   - array of power level values
  */
-void cc1101_set_pa_table(FuriHalSpiBusHandle* handle, const uint8_t value[8]);
+void cc1101_set_pa_table(const FuriHalSpiBusHandle* handle, const uint8_t value[8]);
 
 /** Write FIFO
  *
@@ -178,7 +181,7 @@ void cc1101_set_pa_table(FuriHalSpiBusHandle* handle, const uint8_t value[8]);
  *
  * @return     size, written bytes count
  */
-uint8_t cc1101_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* data, uint8_t size);
+uint8_t cc1101_write_fifo(const FuriHalSpiBusHandle* handle, const uint8_t* data, uint8_t size);
 
 /** Read FIFO
  *
@@ -188,7 +191,7 @@ uint8_t cc1101_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* data, uint
  *
  * @return     size, read bytes count
  */
-uint8_t cc1101_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* data, uint8_t* size);
+uint8_t cc1101_read_fifo(const FuriHalSpiBusHandle* handle, uint8_t* data, uint8_t* size);
 
 #ifdef __cplusplus
 }
diff --git a/lib/drivers/lp5562.c b/lib/drivers/lp5562.c
index 30a5b559a..7db9bbce4 100644
--- a/lib/drivers/lp5562.c
+++ b/lib/drivers/lp5562.c
@@ -3,12 +3,12 @@
 #include "lp5562_reg.h"
 #include <furi_hal.h>
 
-void lp5562_reset(FuriHalI2cBusHandle* handle) {
+void lp5562_reset(const FuriHalI2cBusHandle* handle) {
     Reg0D_Reset reg = {.value = 0xFF};
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x0D, *(uint8_t*)&reg, LP5562_I2C_TIMEOUT);
 }
 
-void lp5562_configure(FuriHalI2cBusHandle* handle) {
+void lp5562_configure(const FuriHalI2cBusHandle* handle) {
     Reg08_Config config = {.INT_CLK_EN = true, .PS_EN = true, .PWM_HF = true};
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x08, *(uint8_t*)&config, LP5562_I2C_TIMEOUT);
 
@@ -21,14 +21,17 @@ void lp5562_configure(FuriHalI2cBusHandle* handle) {
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x70, *(uint8_t*)&map, LP5562_I2C_TIMEOUT);
 }
 
-void lp5562_enable(FuriHalI2cBusHandle* handle) {
+void lp5562_enable(const FuriHalI2cBusHandle* handle) {
     Reg00_Enable reg = {.CHIP_EN = true, .LOG_EN = true};
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x00, *(uint8_t*)&reg, LP5562_I2C_TIMEOUT);
     //>488μs delay is required after writing to 0x00 register, otherwise program engine will not work
     furi_delay_us(500);
 }
 
-void lp5562_set_channel_current(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value) {
+void lp5562_set_channel_current(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    uint8_t value) {
     uint8_t reg_no;
     if(channel == LP5562ChannelRed) {
         reg_no = LP5562_CHANNEL_RED_CURRENT_REGISTER;
@@ -44,7 +47,10 @@ void lp5562_set_channel_current(FuriHalI2cBusHandle* handle, LP5562Channel chann
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, reg_no, value, LP5562_I2C_TIMEOUT);
 }
 
-void lp5562_set_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value) {
+void lp5562_set_channel_value(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    uint8_t value) {
     uint8_t reg_no;
     if(channel == LP5562ChannelRed) {
         reg_no = LP5562_CHANNEL_RED_VALUE_REGISTER;
@@ -60,7 +66,7 @@ void lp5562_set_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, reg_no, value, LP5562_I2C_TIMEOUT);
 }
 
-uint8_t lp5562_get_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel) {
+uint8_t lp5562_get_channel_value(const FuriHalI2cBusHandle* handle, LP5562Channel channel) {
     uint8_t reg_no;
     uint8_t value;
     if(channel == LP5562ChannelRed) {
@@ -78,7 +84,10 @@ uint8_t lp5562_get_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel chan
     return value;
 }
 
-void lp5562_set_channel_src(FuriHalI2cBusHandle* handle, LP5562Channel channel, LP5562Engine src) {
+void lp5562_set_channel_src(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    LP5562Engine src) {
     uint8_t reg_val = 0;
     uint8_t bit_offset = 0;
 
@@ -107,7 +116,7 @@ void lp5562_set_channel_src(FuriHalI2cBusHandle* handle, LP5562Channel channel,
 }
 
 void lp5562_execute_program(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint16_t* program) {
@@ -155,7 +164,7 @@ void lp5562_execute_program(
     furi_hal_i2c_write_reg_8(handle, LP5562_ADDRESS, 0x00, enable_reg, LP5562_I2C_TIMEOUT);
 }
 
-void lp5562_stop_program(FuriHalI2cBusHandle* handle, LP5562Engine eng) {
+void lp5562_stop_program(const FuriHalI2cBusHandle* handle, LP5562Engine eng) {
     if((eng < LP5562Engine1) || (eng > LP5562Engine3)) return;
     uint8_t reg_val = 0;
     uint8_t bit_offset = 0;
@@ -169,7 +178,7 @@ void lp5562_stop_program(FuriHalI2cBusHandle* handle, LP5562Engine eng) {
 }
 
 void lp5562_execute_ramp(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint8_t val_start,
@@ -213,7 +222,7 @@ void lp5562_execute_ramp(
 }
 
 void lp5562_execute_blink(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint16_t on_time,
diff --git a/lib/drivers/lp5562.h b/lib/drivers/lp5562.h
index f5ebeeae2..2e54e1ce3 100644
--- a/lib/drivers/lp5562.h
+++ b/lib/drivers/lp5562.h
@@ -20,39 +20,48 @@ typedef enum {
 } LP5562Engine;
 
 /** Initialize Driver */
-void lp5562_reset(FuriHalI2cBusHandle* handle);
+void lp5562_reset(const FuriHalI2cBusHandle* handle);
 
 /** Configure Driver */
-void lp5562_configure(FuriHalI2cBusHandle* handle);
+void lp5562_configure(const FuriHalI2cBusHandle* handle);
 
 /** Enable Driver */
-void lp5562_enable(FuriHalI2cBusHandle* handle);
+void lp5562_enable(const FuriHalI2cBusHandle* handle);
 
 /** Set channel current */
-void lp5562_set_channel_current(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value);
+void lp5562_set_channel_current(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    uint8_t value);
 
 /** Set channel PWM value */
-void lp5562_set_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel, uint8_t value);
+void lp5562_set_channel_value(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    uint8_t value);
 
 /** Get channel PWM value */
-uint8_t lp5562_get_channel_value(FuriHalI2cBusHandle* handle, LP5562Channel channel);
+uint8_t lp5562_get_channel_value(const FuriHalI2cBusHandle* handle, LP5562Channel channel);
 
 /** Set channel source */
-void lp5562_set_channel_src(FuriHalI2cBusHandle* handle, LP5562Channel channel, LP5562Engine src);
+void lp5562_set_channel_src(
+    const FuriHalI2cBusHandle* handle,
+    LP5562Channel channel,
+    LP5562Engine src);
 
 /** Execute program sequence */
 void lp5562_execute_program(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint16_t* program);
 
 /** Stop program sequence */
-void lp5562_stop_program(FuriHalI2cBusHandle* handle, LP5562Engine eng);
+void lp5562_stop_program(const FuriHalI2cBusHandle* handle, LP5562Engine eng);
 
 /** Execute ramp program sequence */
 void lp5562_execute_ramp(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint8_t val_start,
@@ -61,7 +70,7 @@ void lp5562_execute_ramp(
 
 /** Start blink program sequence */
 void lp5562_execute_blink(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     LP5562Engine eng,
     LP5562Channel ch,
     uint16_t on_time,
diff --git a/lib/drivers/st25r3916.c b/lib/drivers/st25r3916.c
index f8dc9a5eb..0721a52c7 100644
--- a/lib/drivers/st25r3916.c
+++ b/lib/drivers/st25r3916.c
@@ -2,7 +2,7 @@
 
 #include <furi.h>
 
-void st25r3916_mask_irq(FuriHalSpiBusHandle* handle, uint32_t mask) {
+void st25r3916_mask_irq(const FuriHalSpiBusHandle* handle, uint32_t mask) {
     furi_assert(handle);
 
     uint8_t irq_mask_regs[4] = {
@@ -14,7 +14,7 @@ void st25r3916_mask_irq(FuriHalSpiBusHandle* handle, uint32_t mask) {
     st25r3916_write_burst_regs(handle, ST25R3916_REG_IRQ_MASK_MAIN, irq_mask_regs, 4);
 }
 
-uint32_t st25r3916_get_irq(FuriHalSpiBusHandle* handle) {
+uint32_t st25r3916_get_irq(const FuriHalSpiBusHandle* handle) {
     furi_assert(handle);
 
     uint8_t irq_regs[4] = {};
@@ -32,7 +32,7 @@ uint32_t st25r3916_get_irq(FuriHalSpiBusHandle* handle) {
     return irq;
 }
 
-void st25r3916_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t bits) {
+void st25r3916_write_fifo(const FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t bits) {
     furi_assert(handle);
     furi_assert(buff);
 
@@ -45,7 +45,7 @@ void st25r3916_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size
 }
 
 bool st25r3916_read_fifo(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* buff,
     size_t buff_size,
     size_t* buff_bits) {
diff --git a/lib/drivers/st25r3916.h b/lib/drivers/st25r3916.h
index 0e77b6317..3eddaa430 100644
--- a/lib/drivers/st25r3916.h
+++ b/lib/drivers/st25r3916.h
@@ -75,7 +75,7 @@ extern "C" {
  * @param   handle  - pointer to FuriHalSpiBusHandle instance
  * @param   mask    - mask of interrupts to be disabled
  */
-void st25r3916_mask_irq(FuriHalSpiBusHandle* handle, uint32_t mask);
+void st25r3916_mask_irq(const FuriHalSpiBusHandle* handle, uint32_t mask);
 
 /** Get st25r3916 interrupts
  *
@@ -83,7 +83,7 @@ void st25r3916_mask_irq(FuriHalSpiBusHandle* handle, uint32_t mask);
  *
  * @return received interrupts
  */
-uint32_t st25r3916_get_irq(FuriHalSpiBusHandle* handle);
+uint32_t st25r3916_get_irq(const FuriHalSpiBusHandle* handle);
 
 /** Write FIFO
  *
@@ -91,7 +91,7 @@ uint32_t st25r3916_get_irq(FuriHalSpiBusHandle* handle);
  * @param   buff    - buffer to write to FIFO
  * @param   bits    - number of bits to write
  */
-void st25r3916_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t bits);
+void st25r3916_write_fifo(const FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t bits);
 
 /** Read FIFO
  *
@@ -103,7 +103,7 @@ void st25r3916_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size
  * @return  true if read success, false otherwise
 */
 bool st25r3916_read_fifo(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* buff,
     size_t buff_size,
     size_t* buff_bits);
diff --git a/lib/drivers/st25r3916_reg.c b/lib/drivers/st25r3916_reg.c
index f7a47d463..cdbf0fd3d 100644
--- a/lib/drivers/st25r3916_reg.c
+++ b/lib/drivers/st25r3916_reg.c
@@ -28,18 +28,18 @@
     (ST25R3916_CMD_LEN +  \
      ST25R3916_FIFO_DEPTH) /*!< ST25R3916 communication buffer: CMD + FIFO length    */
 
-static void st25r3916_reg_tx_byte(FuriHalSpiBusHandle* handle, uint8_t byte) {
+static void st25r3916_reg_tx_byte(const FuriHalSpiBusHandle* handle, uint8_t byte) {
     uint8_t val = byte;
     furi_hal_spi_bus_tx(handle, &val, 1, 5);
 }
 
-void st25r3916_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val) {
+void st25r3916_read_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val) {
     furi_check(handle);
     st25r3916_read_burst_regs(handle, reg, val, 1);
 }
 
 void st25r3916_read_burst_regs(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg_start,
     uint8_t* values,
     uint8_t length) {
@@ -59,14 +59,14 @@ void st25r3916_read_burst_regs(
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val) {
+void st25r3916_write_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val) {
     furi_check(handle);
     uint8_t reg_val = val;
     st25r3916_write_burst_regs(handle, reg, &reg_val, 1);
 }
 
 void st25r3916_write_burst_regs(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg_start,
     const uint8_t* values,
     uint8_t length) {
@@ -86,7 +86,10 @@ void st25r3916_write_burst_regs(
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_reg_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t length) {
+void st25r3916_reg_write_fifo(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* buff,
+    size_t length) {
     furi_check(handle);
     furi_check(buff);
     furi_check(length);
@@ -98,7 +101,7 @@ void st25r3916_reg_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff,
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_reg_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
+void st25r3916_reg_read_fifo(const FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
     furi_check(handle);
     furi_check(buff);
     furi_check(length);
@@ -110,7 +113,10 @@ void st25r3916_reg_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_write_pta_mem(FuriHalSpiBusHandle* handle, const uint8_t* values, size_t length) {
+void st25r3916_write_pta_mem(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* values,
+    size_t length) {
     furi_check(handle);
     furi_check(values);
     furi_check(length);
@@ -122,7 +128,7 @@ void st25r3916_write_pta_mem(FuriHalSpiBusHandle* handle, const uint8_t* values,
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_read_pta_mem(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
+void st25r3916_read_pta_mem(const FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
     furi_check(handle);
     furi_check(buff);
     furi_check(length);
@@ -136,7 +142,10 @@ void st25r3916_read_pta_mem(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t l
     memcpy(buff, tmp_buff + 1, length);
 }
 
-void st25r3916_write_ptf_mem(FuriHalSpiBusHandle* handle, const uint8_t* values, size_t length) {
+void st25r3916_write_ptf_mem(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* values,
+    size_t length) {
     furi_check(handle);
     furi_check(values);
 
@@ -146,7 +155,7 @@ void st25r3916_write_ptf_mem(FuriHalSpiBusHandle* handle, const uint8_t* values,
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_write_pttsn_mem(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
+void st25r3916_write_pttsn_mem(const FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length) {
     furi_check(handle);
     furi_check(buff);
 
@@ -156,7 +165,7 @@ void st25r3916_write_pttsn_mem(FuriHalSpiBusHandle* handle, uint8_t* buff, size_
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_direct_cmd(FuriHalSpiBusHandle* handle, uint8_t cmd) {
+void st25r3916_direct_cmd(const FuriHalSpiBusHandle* handle, uint8_t cmd) {
     furi_check(handle);
 
     furi_hal_gpio_write(handle->cs, false);
@@ -164,7 +173,7 @@ void st25r3916_direct_cmd(FuriHalSpiBusHandle* handle, uint8_t cmd) {
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_read_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val) {
+void st25r3916_read_test_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val) {
     furi_check(handle);
 
     furi_hal_gpio_write(handle->cs, false);
@@ -174,7 +183,7 @@ void st25r3916_read_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t*
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_write_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val) {
+void st25r3916_write_test_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val) {
     furi_check(handle);
 
     furi_hal_gpio_write(handle->cs, false);
@@ -184,7 +193,7 @@ void st25r3916_write_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
     furi_hal_gpio_write(handle->cs, true);
 }
 
-void st25r3916_clear_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t clr_mask) {
+void st25r3916_clear_reg_bits(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t clr_mask) {
     furi_check(handle);
 
     uint8_t reg_val = 0;
@@ -195,7 +204,7 @@ void st25r3916_clear_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
     }
 }
 
-void st25r3916_set_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t set_mask) {
+void st25r3916_set_reg_bits(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t set_mask) {
     furi_check(handle);
 
     uint8_t reg_val = 0;
@@ -207,7 +216,7 @@ void st25r3916_set_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t se
 }
 
 void st25r3916_change_reg_bits(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t mask,
     uint8_t value) {
@@ -217,7 +226,7 @@ void st25r3916_change_reg_bits(
 }
 
 void st25r3916_modify_reg(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t clr_mask,
     uint8_t set_mask) {
@@ -233,7 +242,7 @@ void st25r3916_modify_reg(
 }
 
 void st25r3916_change_test_reg_bits(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t mask,
     uint8_t value) {
@@ -248,7 +257,7 @@ void st25r3916_change_test_reg_bits(
     }
 }
 
-bool st25r3916_check_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t mask, uint8_t val) {
+bool st25r3916_check_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t mask, uint8_t val) {
     furi_check(handle);
 
     uint8_t reg_val = 0;
diff --git a/lib/drivers/st25r3916_reg.h b/lib/drivers/st25r3916_reg.h
index 5163c4423..524f93cc7 100644
--- a/lib/drivers/st25r3916_reg.h
+++ b/lib/drivers/st25r3916_reg.h
@@ -967,7 +967,7 @@ extern "C" {
  * @param   reg         - register address
  * @param   val         - pointer to the variable to store the read value
  */
-void st25r3916_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val);
+void st25r3916_read_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val);
 
 /** Read multiple registers
  *
@@ -977,7 +977,7 @@ void st25r3916_read_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val);
  * @param   length      - number of registers to read
  */
 void st25r3916_read_burst_regs(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg_start,
     uint8_t* values,
     uint8_t length);
@@ -988,7 +988,7 @@ void st25r3916_read_burst_regs(
  * @param   reg         - register address
  * @param   val         - value to write
  */
-void st25r3916_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val);
+void st25r3916_write_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val);
 
 /** Write multiple registers
  *
@@ -998,7 +998,7 @@ void st25r3916_write_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val);
  * @param   length      - number of registers to write
  */
 void st25r3916_write_burst_regs(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg_start,
     const uint8_t* values,
     uint8_t length);
@@ -1009,7 +1009,10 @@ void st25r3916_write_burst_regs(
  * @param   buff        - buffer to write to FIFO
  * @param   length      - number of bytes to write
  */
-void st25r3916_reg_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff, size_t length);
+void st25r3916_reg_write_fifo(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* buff,
+    size_t length);
 
 /** Read fifo register
  *
@@ -1017,7 +1020,7 @@ void st25r3916_reg_write_fifo(FuriHalSpiBusHandle* handle, const uint8_t* buff,
  * @param   buff        - buffer to store the read values
  * @param   length      - number of bytes to read
  */
-void st25r3916_reg_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length);
+void st25r3916_reg_read_fifo(const FuriHalSpiBusHandle* handle, uint8_t* buff, size_t length);
 
 /** Write PTA memory register
  *
@@ -1025,7 +1028,10 @@ void st25r3916_reg_read_fifo(FuriHalSpiBusHandle* handle, uint8_t* buff, size_t
  * @param   values      - pointer to buffer to write
  * @param   length      - number of bytes to write
  */
-void st25r3916_write_pta_mem(FuriHalSpiBusHandle* handle, const uint8_t* values, size_t length);
+void st25r3916_write_pta_mem(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* values,
+    size_t length);
 
 /** Read PTA memory register
  *
@@ -1033,7 +1039,7 @@ void st25r3916_write_pta_mem(FuriHalSpiBusHandle* handle, const uint8_t* values,
  * @param   values      - buffer to store the read values
  * @param   length      - number of bytes to read
  */
-void st25r3916_read_pta_mem(FuriHalSpiBusHandle* handle, uint8_t* values, size_t length);
+void st25r3916_read_pta_mem(const FuriHalSpiBusHandle* handle, uint8_t* values, size_t length);
 
 /** Write PTF memory register
  *
@@ -1041,7 +1047,10 @@ void st25r3916_read_pta_mem(FuriHalSpiBusHandle* handle, uint8_t* values, size_t
  * @param   values      - pointer to buffer to write
  * @param   length      - number of bytes to write
  */
-void st25r3916_write_ptf_mem(FuriHalSpiBusHandle* handle, const uint8_t* values, size_t length);
+void st25r3916_write_ptf_mem(
+    const FuriHalSpiBusHandle* handle,
+    const uint8_t* values,
+    size_t length);
 
 /** Read PTTSN memory register
  *
@@ -1049,21 +1058,21 @@ void st25r3916_write_ptf_mem(FuriHalSpiBusHandle* handle, const uint8_t* values,
  * @param   values      - pointer to buffer to write
  * @param   length      - number of bytes to write
  */
-void st25r3916_write_pttsn_mem(FuriHalSpiBusHandle* handle, uint8_t* values, size_t length);
+void st25r3916_write_pttsn_mem(const FuriHalSpiBusHandle* handle, uint8_t* values, size_t length);
 
 /** Send Direct command
  *
  * @param   handle      - pointer to FuriHalSpiBusHandle instance
  * @param   cmd         - direct command
  */
-void st25r3916_direct_cmd(FuriHalSpiBusHandle* handle, uint8_t cmd);
+void st25r3916_direct_cmd(const FuriHalSpiBusHandle* handle, uint8_t cmd);
 
 /** Read test register
  * @param   handle      - pointer to FuriHalSpiBusHandle instance
  * @param   reg         - register address
  * @param   val         - pointer to the variable to store the read value
  */
-void st25r3916_read_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val);
+void st25r3916_read_test_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t* val);
 
 /** Write test register
  *
@@ -1071,7 +1080,7 @@ void st25r3916_read_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t*
  * @param   reg         - register address
  * @param   val         - value to write
  */
-void st25r3916_write_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val);
+void st25r3916_write_test_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t val);
 
 /** Clear register bits
  *
@@ -1079,7 +1088,7 @@ void st25r3916_write_test_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
  * @param   reg         - register address
  * @param   clr_mask    - bit mask to clear
  */
-void st25r3916_clear_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t clr_mask);
+void st25r3916_clear_reg_bits(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t clr_mask);
 
 /** Set register bits
  *
@@ -1087,7 +1096,7 @@ void st25r3916_clear_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t
  * @param   reg         - register address
  * @param   set_mask    - bit mask to set
  */
-void st25r3916_set_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t set_mask);
+void st25r3916_set_reg_bits(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t set_mask);
 
 /** Change register bits
  *
@@ -1097,7 +1106,7 @@ void st25r3916_set_reg_bits(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t se
  * @param   value       - new register value to write
  */
 void st25r3916_change_reg_bits(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t mask,
     uint8_t value);
@@ -1110,7 +1119,7 @@ void st25r3916_change_reg_bits(
  * @param   set_mask    - bit mask to set
  */
 void st25r3916_modify_reg(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t clr_mask,
     uint8_t set_mask);
@@ -1123,7 +1132,7 @@ void st25r3916_modify_reg(
  * @param   value       - new register value to write
  */
 void st25r3916_change_test_reg_bits(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t reg,
     uint8_t mask,
     uint8_t value);
@@ -1137,7 +1146,7 @@ void st25r3916_change_test_reg_bits(
  *
  * @return  true if register value matches the expected value, false otherwise
  */
-bool st25r3916_check_reg(FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t mask, uint8_t val);
+bool st25r3916_check_reg(const FuriHalSpiBusHandle* handle, uint8_t reg, uint8_t mask, uint8_t val);
 
 #ifdef __cplusplus
 }
diff --git a/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.c b/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.c
index b4dd51ce7..df758283b 100644
--- a/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.c
+++ b/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.c
@@ -6,7 +6,7 @@
 #include "protocol_ds1971.h"
 #include "protocol_ds_generic.h"
 
-const iButtonProtocolDallasBase* ibutton_protocols_dallas[] = {
+const iButtonProtocolDallasBase* const ibutton_protocols_dallas[] = {
     [iButtonProtocolDS1990] = &ibutton_protocol_ds1990,
     [iButtonProtocolDS1992] = &ibutton_protocol_ds1992,
     [iButtonProtocolDS1996] = &ibutton_protocol_ds1996,
diff --git a/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.h b/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.h
index 2ba1dd39a..71571d91b 100644
--- a/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.h
+++ b/lib/ibutton/protocols/dallas/protocol_group_dallas_defs.h
@@ -14,4 +14,4 @@ typedef enum {
     iButtonProtocolDSMax,
 } iButtonProtocolDallas;
 
-extern const iButtonProtocolDallasBase* ibutton_protocols_dallas[];
+extern const iButtonProtocolDallasBase* const ibutton_protocols_dallas[];
diff --git a/lib/ibutton/protocols/misc/protocol_group_misc_defs.c b/lib/ibutton/protocols/misc/protocol_group_misc_defs.c
index 09ae0bdc7..f8cae0463 100644
--- a/lib/ibutton/protocols/misc/protocol_group_misc_defs.c
+++ b/lib/ibutton/protocols/misc/protocol_group_misc_defs.c
@@ -3,7 +3,7 @@
 #include "protocol_cyfral.h"
 #include "protocol_metakom.h"
 
-const ProtocolBase* ibutton_protocols_misc[] = {
+const ProtocolBase* const ibutton_protocols_misc[] = {
     [iButtonProtocolMiscCyfral] = &ibutton_protocol_misc_cyfral,
     [iButtonProtocolMiscMetakom] = &ibutton_protocol_misc_metakom,
     /* Add new misc protocols here */
diff --git a/lib/ibutton/protocols/misc/protocol_group_misc_defs.h b/lib/ibutton/protocols/misc/protocol_group_misc_defs.h
index 0a7f92847..cde6b0aa9 100644
--- a/lib/ibutton/protocols/misc/protocol_group_misc_defs.h
+++ b/lib/ibutton/protocols/misc/protocol_group_misc_defs.h
@@ -8,4 +8,4 @@ typedef enum {
     iButtonProtocolMiscMax,
 } iButtonProtocolMisc;
 
-extern const ProtocolBase* ibutton_protocols_misc[];
+extern const ProtocolBase* const ibutton_protocols_misc[];
diff --git a/lib/ibutton/protocols/protocol_group_defs.c b/lib/ibutton/protocols/protocol_group_defs.c
index 40a360f0e..ac428f410 100644
--- a/lib/ibutton/protocols/protocol_group_defs.c
+++ b/lib/ibutton/protocols/protocol_group_defs.c
@@ -3,7 +3,7 @@
 #include "dallas/protocol_group_dallas.h"
 #include "misc/protocol_group_misc.h"
 
-const iButtonProtocolGroupBase* ibutton_protocol_groups[] = {
+const iButtonProtocolGroupBase* const ibutton_protocol_groups[] = {
     [iButtonProtocolGroupDallas] = &ibutton_protocol_group_dallas,
     [iButtonProtocolGroupMisc] = &ibutton_protocol_group_misc,
 };
diff --git a/lib/ibutton/protocols/protocol_group_defs.h b/lib/ibutton/protocols/protocol_group_defs.h
index 2d41e3cb8..2c00dfab4 100644
--- a/lib/ibutton/protocols/protocol_group_defs.h
+++ b/lib/ibutton/protocols/protocol_group_defs.h
@@ -8,4 +8,4 @@ typedef enum {
     iButtonProtocolGroupMax
 } iButtonProtocolGroup;
 
-extern const iButtonProtocolGroupBase* ibutton_protocol_groups[];
+extern const iButtonProtocolGroupBase* const ibutton_protocol_groups[];
diff --git a/lib/lfrfid/protocols/lfrfid_protocols.c b/lib/lfrfid/protocols/lfrfid_protocols.c
index 238f8e0cd..c6cc57a68 100644
--- a/lib/lfrfid/protocols/lfrfid_protocols.c
+++ b/lib/lfrfid/protocols/lfrfid_protocols.c
@@ -22,7 +22,7 @@
 #include "protocol_gproxii.h"
 #include "protocol_noralsy.h"
 
-const ProtocolBase* lfrfid_protocols[] = {
+const ProtocolBase* const lfrfid_protocols[] = {
     [LFRFIDProtocolEM4100] = &protocol_em4100,
     [LFRFIDProtocolEM410032] = &protocol_em4100_32,
     [LFRFIDProtocolEM410016] = &protocol_em4100_16,
diff --git a/lib/lfrfid/protocols/lfrfid_protocols.h b/lib/lfrfid/protocols/lfrfid_protocols.h
index 86c31c60b..a33e87990 100644
--- a/lib/lfrfid/protocols/lfrfid_protocols.h
+++ b/lib/lfrfid/protocols/lfrfid_protocols.h
@@ -37,7 +37,7 @@ typedef enum {
     LFRFIDProtocolMax,
 } LFRFIDProtocol;
 
-extern const ProtocolBase* lfrfid_protocols[];
+extern const ProtocolBase* const lfrfid_protocols[];
 
 typedef enum {
     LFRFIDWriteTypeT5577,
diff --git a/lib/lfrfid/protocols/protocol_nexwatch.c b/lib/lfrfid/protocols/protocol_nexwatch.c
index a794a4a8e..08324803f 100644
--- a/lib/lfrfid/protocols/protocol_nexwatch.c
+++ b/lib/lfrfid/protocols/protocol_nexwatch.c
@@ -21,7 +21,7 @@ typedef struct {
     uint8_t chk;
 } ProtocolNexwatchMagic;
 
-ProtocolNexwatchMagic magic_items[] = {
+static ProtocolNexwatchMagic magic_items[] = {
     {0xBE, "Quadrakey", 0},
     {0x88, "Nexkey", 0},
     {0x86, "Honeywell", 0}};
diff --git a/lib/mjs/mjs_parser.c b/lib/mjs/mjs_parser.c
index 212804a86..98f60459d 100644
--- a/lib/mjs/mjs_parser.c
+++ b/lib/mjs/mjs_parser.c
@@ -47,7 +47,7 @@ static int ptest(struct pstate* p) {
     return tok;
 }
 
-static int s_unary_ops[] = {
+static const int s_unary_ops[] = {
     TOK_NOT,
     TOK_TILDA,
     TOK_PLUS_PLUS,
@@ -56,10 +56,10 @@ static int s_unary_ops[] = {
     TOK_MINUS,
     TOK_PLUS,
     TOK_EOF};
-static int s_comparison_ops[] = {TOK_LT, TOK_LE, TOK_GT, TOK_GE, TOK_EOF};
-static int s_postfix_ops[] = {TOK_PLUS_PLUS, TOK_MINUS_MINUS, TOK_EOF};
-static int s_equality_ops[] = {TOK_EQ, TOK_NE, TOK_EQ_EQ, TOK_NE_NE, TOK_EOF};
-static int s_assign_ops[] = {
+static const int s_comparison_ops[] = {TOK_LT, TOK_LE, TOK_GT, TOK_GE, TOK_EOF};
+static const int s_postfix_ops[] = {TOK_PLUS_PLUS, TOK_MINUS_MINUS, TOK_EOF};
+static const int s_equality_ops[] = {TOK_EQ, TOK_NE, TOK_EQ_EQ, TOK_NE_NE, TOK_EOF};
+static const int s_assign_ops[] = {
     TOK_ASSIGN,
     TOK_PLUS_ASSIGN,
     TOK_MINUS_ASSIGN,
@@ -74,7 +74,7 @@ static int s_assign_ops[] = {
     TOK_OR_ASSIGN,
     TOK_EOF};
 
-static int findtok(int* toks, int tok) {
+static int findtok(int const* toks, int tok) {
     int i = 0;
     while(tok != toks[i] && toks[i] != TOK_EOF)
         i++;
diff --git a/lib/nfc/protocols/mf_classic/mf_classic_listener.c b/lib/nfc/protocols/mf_classic/mf_classic_listener.c
index ef571117a..1f5eea271 100644
--- a/lib/nfc/protocols/mf_classic/mf_classic_listener.c
+++ b/lib/nfc/protocols/mf_classic/mf_classic_listener.c
@@ -19,7 +19,7 @@ typedef struct {
     uint8_t cmd_start_byte;
     size_t cmd_len_bits;
     size_t command_num;
-    MfClassicListenerCommandHandler* handler;
+    const MfClassicListenerCommandHandler* handler;
 } MfClassicListenerCmd;
 
 static void mf_classic_listener_prepare_emulation(MfClassicListener* instance) {
@@ -441,42 +441,42 @@ static MfClassicListenerCommand
     return command;
 }
 
-static MfClassicListenerCommandHandler mf_classic_listener_halt_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_halt_handlers[] = {
     mf_classic_listener_halt_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_auth_key_a_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_auth_key_a_handlers[] = {
     mf_classic_listener_auth_key_a_handler,
     mf_classic_listener_auth_second_part_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_auth_key_b_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_auth_key_b_handlers[] = {
     mf_classic_listener_auth_key_b_handler,
     mf_classic_listener_auth_second_part_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_read_block_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_read_block_handlers[] = {
     mf_classic_listener_read_block_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_write_block_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_write_block_handlers[] = {
     mf_classic_listener_write_block_first_part_handler,
     mf_classic_listener_write_block_second_part_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_value_dec_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_value_dec_handlers[] = {
     mf_classic_listener_value_dec_handler,
     mf_classic_listener_value_data_receive_handler,
     mf_classic_listener_value_transfer_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_value_inc_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_value_inc_handlers[] = {
     mf_classic_listener_value_inc_handler,
     mf_classic_listener_value_data_receive_handler,
     mf_classic_listener_value_transfer_handler,
 };
 
-static MfClassicListenerCommandHandler mf_classic_listener_value_restore_handlers[] = {
+static const MfClassicListenerCommandHandler mf_classic_listener_value_restore_handlers[] = {
     mf_classic_listener_value_restore_handler,
     mf_classic_listener_value_data_receive_handler,
     mf_classic_listener_value_transfer_handler,
diff --git a/lib/nfc/protocols/nfc_device_defs.c b/lib/nfc/protocols/nfc_device_defs.c
index 6a145445c..3f508a1fb 100644
--- a/lib/nfc/protocols/nfc_device_defs.c
+++ b/lib/nfc/protocols/nfc_device_defs.c
@@ -31,7 +31,7 @@
  * When implementing a new protocol, add its implementation
  * here under its own index defined in nfc_protocol.h.
  */
-const NfcDeviceBase* nfc_devices[NfcProtocolNum] = {
+const NfcDeviceBase* const nfc_devices[NfcProtocolNum] = {
     [NfcProtocolIso14443_3a] = &nfc_device_iso14443_3a,
     [NfcProtocolIso14443_3b] = &nfc_device_iso14443_3b,
     [NfcProtocolIso14443_4a] = &nfc_device_iso14443_4a,
diff --git a/lib/nfc/protocols/nfc_device_defs.h b/lib/nfc/protocols/nfc_device_defs.h
index f5ba2563f..e5d2707fd 100644
--- a/lib/nfc/protocols/nfc_device_defs.h
+++ b/lib/nfc/protocols/nfc_device_defs.h
@@ -6,7 +6,7 @@
 extern "C" {
 #endif
 
-extern const NfcDeviceBase* nfc_devices[];
+extern const NfcDeviceBase* const nfc_devices[];
 
 #ifdef __cplusplus
 }
diff --git a/lib/nfc/protocols/nfc_listener_defs.c b/lib/nfc/protocols/nfc_listener_defs.c
index 2a6167e9c..c27079f5a 100644
--- a/lib/nfc/protocols/nfc_listener_defs.c
+++ b/lib/nfc/protocols/nfc_listener_defs.c
@@ -8,7 +8,7 @@
 #include <nfc/protocols/slix/slix_listener_defs.h>
 #include <nfc/protocols/felica/felica_listener_defs.h>
 
-const NfcListenerBase* nfc_listeners_api[NfcProtocolNum] = {
+const NfcListenerBase* const nfc_listeners_api[NfcProtocolNum] = {
     [NfcProtocolIso14443_3a] = &nfc_listener_iso14443_3a,
     [NfcProtocolIso14443_3b] = NULL,
     [NfcProtocolIso14443_4a] = &nfc_listener_iso14443_4a,
diff --git a/lib/nfc/protocols/nfc_listener_defs.h b/lib/nfc/protocols/nfc_listener_defs.h
index 4d88cc098..7bd4b49b0 100644
--- a/lib/nfc/protocols/nfc_listener_defs.h
+++ b/lib/nfc/protocols/nfc_listener_defs.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-extern const NfcListenerBase* nfc_listeners_api[NfcProtocolNum];
+extern const NfcListenerBase* const nfc_listeners_api[NfcProtocolNum];
 
 #ifdef __cplusplus
 }
diff --git a/lib/nfc/protocols/nfc_poller_defs.c b/lib/nfc/protocols/nfc_poller_defs.c
index c007740b7..f3ad15e7d 100644
--- a/lib/nfc/protocols/nfc_poller_defs.c
+++ b/lib/nfc/protocols/nfc_poller_defs.c
@@ -13,7 +13,7 @@
 #include <nfc/protocols/slix/slix_poller_defs.h>
 #include <nfc/protocols/st25tb/st25tb_poller_defs.h>
 
-const NfcPollerBase* nfc_pollers_api[NfcProtocolNum] = {
+const NfcPollerBase* const nfc_pollers_api[NfcProtocolNum] = {
     [NfcProtocolIso14443_3a] = &nfc_poller_iso14443_3a,
     [NfcProtocolIso14443_3b] = &nfc_poller_iso14443_3b,
     [NfcProtocolIso14443_4a] = &nfc_poller_iso14443_4a,
diff --git a/lib/nfc/protocols/nfc_poller_defs.h b/lib/nfc/protocols/nfc_poller_defs.h
index a406a5f08..0156cc8b2 100644
--- a/lib/nfc/protocols/nfc_poller_defs.h
+++ b/lib/nfc/protocols/nfc_poller_defs.h
@@ -7,7 +7,7 @@
 extern "C" {
 #endif
 
-extern const NfcPollerBase* nfc_pollers_api[NfcProtocolNum];
+extern const NfcPollerBase* const nfc_pollers_api[NfcProtocolNum];
 
 #ifdef __cplusplus
 }
diff --git a/lib/subghz/protocols/protocol_items.c b/lib/subghz/protocols/protocol_items.c
index 0d9c2a088..d7a14cd1c 100644
--- a/lib/subghz/protocols/protocol_items.c
+++ b/lib/subghz/protocols/protocol_items.c
@@ -1,6 +1,6 @@
 #include "protocol_items.h" // IWYU pragma: keep
 
-const SubGhzProtocol* subghz_protocol_registry_items[] = {
+const SubGhzProtocol* const subghz_protocol_registry_items[] = {
     &subghz_protocol_gate_tx,
     &subghz_protocol_keeloq,
     &subghz_protocol_star_line,
diff --git a/lib/subghz/registry.h b/lib/subghz/registry.h
index 8529c1097..8de376b16 100644
--- a/lib/subghz/registry.h
+++ b/lib/subghz/registry.h
@@ -12,7 +12,7 @@ typedef struct SubGhzProtocolRegistry SubGhzProtocolRegistry;
 typedef struct SubGhzProtocol SubGhzProtocol;
 
 struct SubGhzProtocolRegistry {
-    const SubGhzProtocol** items;
+    const SubGhzProtocol* const* items;
     const size_t size;
 };
 
diff --git a/lib/toolbox/protocols/protocol_dict.c b/lib/toolbox/protocols/protocol_dict.c
index 5680be18d..5cc46d6eb 100644
--- a/lib/toolbox/protocols/protocol_dict.c
+++ b/lib/toolbox/protocols/protocol_dict.c
@@ -2,12 +2,12 @@
 #include "protocol_dict.h"
 
 struct ProtocolDict {
-    const ProtocolBase** base;
+    const ProtocolBase* const* base;
     size_t count;
     void* data[];
 };
 
-ProtocolDict* protocol_dict_alloc(const ProtocolBase** protocols, size_t count) {
+ProtocolDict* protocol_dict_alloc(const ProtocolBase* const* protocols, size_t count) {
     furi_check(protocols);
 
     ProtocolDict* dict = malloc(sizeof(ProtocolDict) + (sizeof(void*) * count));
diff --git a/lib/toolbox/protocols/protocol_dict.h b/lib/toolbox/protocols/protocol_dict.h
index 543b3ead2..a7e02a988 100644
--- a/lib/toolbox/protocols/protocol_dict.h
+++ b/lib/toolbox/protocols/protocol_dict.h
@@ -12,7 +12,7 @@ typedef int32_t ProtocolId;
 #define PROTOCOL_NO           (-1)
 #define PROTOCOL_ALL_FEATURES (0xFFFFFFFF)
 
-ProtocolDict* protocol_dict_alloc(const ProtocolBase** protocols, size_t protocol_count);
+ProtocolDict* protocol_dict_alloc(const ProtocolBase* const* protocols, size_t protocol_count);
 
 void protocol_dict_free(ProtocolDict* dict);
 
diff --git a/scripts/fbt/sdk/collector.py b/scripts/fbt/sdk/collector.py
index 5615f105e..14653eb44 100644
--- a/scripts/fbt/sdk/collector.py
+++ b/scripts/fbt/sdk/collector.py
@@ -113,7 +113,7 @@ def stringify_descr(type_descr):
         # Hack
         if isinstance(type_descr.ptr_to, FunctionType):
             return stringify_descr(type_descr.ptr_to)
-        return f"{stringify_descr(type_descr.ptr_to)}*"
+        return f"{stringify_descr(type_descr.ptr_to)}*{' const' if type_descr.const else ''}"
     elif isinstance(type_descr, Type):
         return (
             f"{'const ' if type_descr.const else ''}"
diff --git a/targets/f18/api_symbols.csv b/targets/f18/api_symbols.csv
index 81ecb9c7e..981340138 100644
--- a/targets/f18/api_symbols.csv
+++ b/targets/f18/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,82.2,,
+Version,+,83.0,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/bt/bt_service/bt_keys_storage.h,,
 Header,+,applications/services/cli/cli.h,,
@@ -788,7 +788,7 @@ Function,+,cli_print_usage,void,"const char*, const char*, const char*"
 Function,+,cli_read,size_t,"Cli*, uint8_t*, size_t"
 Function,+,cli_read_timeout,size_t,"Cli*, uint8_t*, size_t, uint32_t"
 Function,+,cli_session_close,void,Cli*
-Function,+,cli_session_open,void,"Cli*, void*"
+Function,+,cli_session_open,void,"Cli*, const void*"
 Function,+,cli_write,void,"Cli*, const uint8_t*, size_t"
 Function,+,composite_api_resolver_add,void,"CompositeApiResolver*, const ElfApiInterface*"
 Function,+,composite_api_resolver_alloc,CompositeApiResolver*,
@@ -1290,23 +1290,23 @@ Function,+,furi_hal_hid_u2f_get_request,uint32_t,uint8_t*
 Function,+,furi_hal_hid_u2f_is_connected,_Bool,
 Function,+,furi_hal_hid_u2f_send_response,void,"uint8_t*, uint8_t"
 Function,+,furi_hal_hid_u2f_set_callback,void,"HidU2fCallback, void*"
-Function,+,furi_hal_i2c_acquire,void,FuriHalI2cBusHandle*
+Function,+,furi_hal_i2c_acquire,void,const FuriHalI2cBusHandle*
 Function,-,furi_hal_i2c_deinit_early,void,
 Function,-,furi_hal_i2c_init,void,
 Function,-,furi_hal_i2c_init_early,void,
-Function,+,furi_hal_i2c_is_device_ready,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint32_t"
-Function,+,furi_hal_i2c_read_mem,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_read_reg_16,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t*, uint32_t"
-Function,+,furi_hal_i2c_read_reg_8,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, uint32_t"
-Function,+,furi_hal_i2c_release,void,FuriHalI2cBusHandle*
-Function,+,furi_hal_i2c_rx,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_rx_ext,_Bool,"FuriHalI2cBusHandle*, uint16_t, _Bool, uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
-Function,+,furi_hal_i2c_trx,_Bool,"FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_tx,_Bool,"FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_tx_ext,_Bool,"FuriHalI2cBusHandle*, uint16_t, _Bool, const uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
-Function,+,furi_hal_i2c_write_mem,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, const uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_write_reg_16,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t, uint32_t"
-Function,+,furi_hal_i2c_write_reg_8,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t, uint32_t"
+Function,+,furi_hal_i2c_is_device_ready,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint32_t"
+Function,+,furi_hal_i2c_read_mem,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_read_reg_16,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t*, uint32_t"
+Function,+,furi_hal_i2c_read_reg_8,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, uint32_t"
+Function,+,furi_hal_i2c_release,void,const FuriHalI2cBusHandle*
+Function,+,furi_hal_i2c_rx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_rx_ext,_Bool,"const FuriHalI2cBusHandle*, uint16_t, _Bool, uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
+Function,+,furi_hal_i2c_trx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_tx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_tx_ext,_Bool,"const FuriHalI2cBusHandle*, uint16_t, _Bool, const uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
+Function,+,furi_hal_i2c_write_mem,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_write_reg_16,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t, uint32_t"
+Function,+,furi_hal_i2c_write_reg_8,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t, uint32_t"
 Function,+,furi_hal_info_get,void,"PropertyValueCallback, char, void*"
 Function,+,furi_hal_info_get_api_version,void,"uint16_t*, uint16_t*"
 Function,-,furi_hal_init,void,
@@ -1472,20 +1472,20 @@ Function,+,furi_hal_speaker_release,void,
 Function,+,furi_hal_speaker_set_volume,void,float
 Function,+,furi_hal_speaker_start,void,"float, float"
 Function,+,furi_hal_speaker_stop,void,
-Function,+,furi_hal_spi_acquire,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_acquire,void,const FuriHalSpiBusHandle*
 Function,+,furi_hal_spi_bus_deinit,void,FuriHalSpiBus*
-Function,+,furi_hal_spi_bus_handle_deinit,void,FuriHalSpiBusHandle*
-Function,+,furi_hal_spi_bus_handle_init,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_bus_handle_deinit,void,const FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_bus_handle_init,void,const FuriHalSpiBusHandle*
 Function,+,furi_hal_spi_bus_init,void,FuriHalSpiBus*
-Function,+,furi_hal_spi_bus_rx,_Bool,"FuriHalSpiBusHandle*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_trx,_Bool,"FuriHalSpiBusHandle*, const uint8_t*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_trx_dma,_Bool,"FuriHalSpiBusHandle*, uint8_t*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_tx,_Bool,"FuriHalSpiBusHandle*, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_rx,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_trx,_Bool,"const FuriHalSpiBusHandle*, const uint8_t*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_trx_dma,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_tx,_Bool,"const FuriHalSpiBusHandle*, const uint8_t*, size_t, uint32_t"
 Function,-,furi_hal_spi_config_deinit_early,void,
 Function,-,furi_hal_spi_config_init,void,
 Function,-,furi_hal_spi_config_init_early,void,
 Function,-,furi_hal_spi_dma_init,void,
-Function,+,furi_hal_spi_release,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_release,void,const FuriHalSpiBusHandle*
 Function,+,furi_hal_switch,void,void*
 Function,+,furi_hal_usb_ccid_insert_smartcard,void,
 Function,+,furi_hal_usb_ccid_remove_smartcard,void,
@@ -1498,7 +1498,7 @@ Function,+,furi_hal_usb_is_locked,_Bool,
 Function,+,furi_hal_usb_lock,void,
 Function,+,furi_hal_usb_reinit,void,
 Function,+,furi_hal_usb_set_config,_Bool,"FuriHalUsbInterface*, void*"
-Function,-,furi_hal_usb_set_state_callback,void,"FuriHalUsbStateCallback, void*"
+Function,+,furi_hal_usb_set_state_callback,void,"FuriHalUsbStateCallback, void*"
 Function,+,furi_hal_usb_unlock,void,
 Function,+,furi_hal_version_do_i_belong_here,_Bool,
 Function,+,furi_hal_version_get_ble_local_device_name_ptr,const char*,
@@ -1736,7 +1736,7 @@ Function,-,getchar,int,
 Function,-,getchar_unlocked,int,
 Function,-,getenv,char*,const char*
 Function,-,gets,char*,char*
-Function,-,getsubopt,int,"char**, char**, char**"
+Function,-,getsubopt,int,"char**, char* const*, char**"
 Function,-,getw,int,FILE*
 Function,+,gui_add_framebuffer_callback,void,"Gui*, GuiCanvasCommitCallback, void*"
 Function,+,gui_add_view_port,void,"Gui*, ViewPort*, GuiLayer"
@@ -2376,7 +2376,7 @@ Function,-,powl,long double,"long double, long double"
 Function,+,pretty_format_bytes_hex_canonical,void,"FuriString*, size_t, const char*, const uint8_t*, size_t"
 Function,-,printf,int,"const char*, ..."
 Function,+,property_value_out,void,"PropertyValueContext*, const char*, unsigned int, ..."
-Function,+,protocol_dict_alloc,ProtocolDict*,"const ProtocolBase**, size_t"
+Function,+,protocol_dict_alloc,ProtocolDict*,"const ProtocolBase* const*, size_t"
 Function,+,protocol_dict_decoders_feed,ProtocolId,"ProtocolDict*, _Bool, uint32_t"
 Function,+,protocol_dict_decoders_feed_by_feature,ProtocolId,"ProtocolDict*, uint32_t, _Bool, uint32_t"
 Function,+,protocol_dict_decoders_feed_by_id,ProtocolId,"ProtocolDict*, size_t, _Bool, uint32_t"
@@ -2539,29 +2539,29 @@ Function,+,srand,void,unsigned
 Function,-,srand48,void,long
 Function,-,srandom,void,unsigned
 Function,+,sscanf,int,"const char*, const char*, ..."
-Function,+,st25r3916_change_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_change_test_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_check_reg,_Bool,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_clear_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_direct_cmd,void,"FuriHalSpiBusHandle*, uint8_t"
-Function,+,st25r3916_get_irq,uint32_t,FuriHalSpiBusHandle*
-Function,+,st25r3916_mask_irq,void,"FuriHalSpiBusHandle*, uint32_t"
-Function,+,st25r3916_modify_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_read_burst_regs,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*, uint8_t"
-Function,+,st25r3916_read_fifo,_Bool,"FuriHalSpiBusHandle*, uint8_t*, size_t, size_t*"
-Function,+,st25r3916_read_pta_mem,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_read_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*"
-Function,+,st25r3916_read_test_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*"
-Function,+,st25r3916_reg_read_fifo,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_reg_write_fifo,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_set_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_write_burst_regs,void,"FuriHalSpiBusHandle*, uint8_t, const uint8_t*, uint8_t"
-Function,+,st25r3916_write_fifo,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_pta_mem,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_ptf_mem,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_pttsn_mem,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_write_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_write_test_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_change_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_change_test_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_check_reg,_Bool,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_clear_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_direct_cmd,void,"const FuriHalSpiBusHandle*, uint8_t"
+Function,+,st25r3916_get_irq,uint32_t,const FuriHalSpiBusHandle*
+Function,+,st25r3916_mask_irq,void,"const FuriHalSpiBusHandle*, uint32_t"
+Function,+,st25r3916_modify_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_read_burst_regs,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*, uint8_t"
+Function,+,st25r3916_read_fifo,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, size_t, size_t*"
+Function,+,st25r3916_read_pta_mem,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_read_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*"
+Function,+,st25r3916_read_test_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*"
+Function,+,st25r3916_reg_read_fifo,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_reg_write_fifo,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_set_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_write_burst_regs,void,"const FuriHalSpiBusHandle*, uint8_t, const uint8_t*, uint8_t"
+Function,+,st25r3916_write_fifo,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_pta_mem,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_ptf_mem,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_pttsn_mem,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_write_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_write_test_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
 Function,+,storage_common_copy,FS_Error,"Storage*, const char*, const char*"
 Function,+,storage_common_equivalent_path,_Bool,"Storage*, const char*, const char*"
 Function,+,storage_common_exists,_Bool,"Storage*, const char*"
@@ -2935,22 +2935,22 @@ Variable,-,__stdio_exit_handler,void (*)(),
 Variable,+,_ctype_,const char[],
 Variable,+,_impure_data,_reent,
 Variable,+,_impure_ptr,_reent*,
-Variable,-,_sys_errlist,const char*[],
+Variable,-,_sys_errlist,const char* const[],
 Variable,-,_sys_nerr,int,
 Variable,-,ble_profile_hid,const FuriHalBleProfileTemplate*,
-Variable,-,ble_profile_serial,const FuriHalBleProfileTemplate*,
-Variable,+,cli_vcp,CliSession,
+Variable,+,ble_profile_serial,const FuriHalBleProfileTemplate* const,
+Variable,+,cli_vcp,const CliSession,
 Variable,+,compress_config_heatshrink_default,const CompressConfigHeatshrink,
-Variable,+,firmware_api_interface,const ElfApiInterface*,
+Variable,+,firmware_api_interface,const ElfApiInterface* const,
 Variable,+,furi_hal_i2c_bus_external,FuriHalI2cBus,
 Variable,+,furi_hal_i2c_bus_power,FuriHalI2cBus,
-Variable,+,furi_hal_i2c_handle_external,FuriHalI2cBusHandle,
-Variable,+,furi_hal_i2c_handle_power,FuriHalI2cBusHandle,
+Variable,+,furi_hal_i2c_handle_external,const FuriHalI2cBusHandle,
+Variable,+,furi_hal_i2c_handle_power,const FuriHalI2cBusHandle,
 Variable,+,furi_hal_spi_bus_d,FuriHalSpiBus,
-Variable,+,furi_hal_spi_bus_handle_display,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_external,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_sd_fast,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_sd_slow,FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_display,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_external,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_sd_fast,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_sd_slow,const FuriHalSpiBusHandle,
 Variable,+,furi_hal_spi_bus_r,FuriHalSpiBus,
 Variable,+,furi_hal_spi_preset_1edge_low_16m,const LL_SPI_InitTypeDef,
 Variable,+,furi_hal_spi_preset_1edge_low_2m,const LL_SPI_InitTypeDef,
diff --git a/targets/f18/furi_hal/furi_hal_spi_config.c b/targets/f18/furi_hal/furi_hal_spi_config.c
index 8957bfe3a..a7393d3f0 100644
--- a/targets/f18/furi_hal/furi_hal_spi_config.c
+++ b/targets/f18/furi_hal/furi_hal_spi_config.c
@@ -143,7 +143,7 @@ FuriHalSpiBus furi_hal_spi_bus_d = {
 /* SPI Bus Handles */
 
 inline static void furi_hal_spi_bus_r_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -189,7 +189,7 @@ inline static void furi_hal_spi_bus_r_handle_event_callback(
 }
 
 inline static void furi_hal_spi_bus_nfc_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -255,12 +255,12 @@ inline static void furi_hal_spi_bus_nfc_handle_event_callback(
 }
 
 static void furi_hal_spi_bus_handle_external_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_r_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_2m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
     .bus = &furi_hal_spi_bus_r,
     .callback = furi_hal_spi_bus_handle_external_event_callback,
     .miso = &gpio_ext_pa6,
@@ -270,7 +270,7 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
 };
 
 inline static void furi_hal_spi_bus_d_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -311,12 +311,12 @@ inline static void furi_hal_spi_bus_d_handle_event_callback(
 }
 
 static void furi_hal_spi_bus_handle_display_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_4m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_display_event_callback,
     .miso = &gpio_spi_d_miso,
@@ -326,12 +326,12 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
 };
 
 static void furi_hal_spi_bus_handle_sd_fast_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_16m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_sd_fast_event_callback,
     .miso = &gpio_spi_d_miso,
@@ -341,12 +341,12 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
 };
 
 static void furi_hal_spi_bus_handle_sd_slow_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_2m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_sd_slow_event_callback,
     .miso = &gpio_spi_d_miso,
diff --git a/targets/f18/furi_hal/furi_hal_spi_config.h b/targets/f18/furi_hal/furi_hal_spi_config.h
index da39fbfa6..2ff8b41b1 100644
--- a/targets/f18/furi_hal/furi_hal_spi_config.h
+++ b/targets/f18/furi_hal/furi_hal_spi_config.h
@@ -39,16 +39,16 @@ extern FuriHalSpiBus furi_hal_spi_bus_d;
  * Bus pins are floating on inactive state, CS high after initialization
  * 
  */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_external;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_external;
 
 /** ST7567(Display) on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_display;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_display;
 
 /** SdCard in fast mode on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast;
 
 /** SdCard in slow mode on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow;
 
 #ifdef __cplusplus
 }
diff --git a/targets/f7/api_symbols.csv b/targets/f7/api_symbols.csv
index ba1603b0b..da275594b 100644
--- a/targets/f7/api_symbols.csv
+++ b/targets/f7/api_symbols.csv
@@ -1,5 +1,5 @@
 entry,status,name,type,params
-Version,+,82.2,,
+Version,+,83.0,,
 Header,+,applications/drivers/subghz/cc1101_ext/cc1101_ext_interconnect.h,,
 Header,+,applications/services/bt/bt_service/bt.h,,
 Header,+,applications/services/bt/bt_service/bt_keys_storage.h,,
@@ -865,7 +865,7 @@ Function,+,cli_print_usage,void,"const char*, const char*, const char*"
 Function,+,cli_read,size_t,"Cli*, uint8_t*, size_t"
 Function,+,cli_read_timeout,size_t,"Cli*, uint8_t*, size_t, uint32_t"
 Function,+,cli_session_close,void,Cli*
-Function,+,cli_session_open,void,"Cli*, void*"
+Function,+,cli_session_open,void,"Cli*, const void*"
 Function,+,cli_write,void,"Cli*, const uint8_t*, size_t"
 Function,+,composite_api_resolver_add,void,"CompositeApiResolver*, const ElfApiInterface*"
 Function,+,composite_api_resolver_alloc,CompositeApiResolver*,
@@ -1052,7 +1052,7 @@ Function,+,felica_get_uid,const uint8_t*,"const FelicaData*, size_t*"
 Function,+,felica_is_equal,_Bool,"const FelicaData*, const FelicaData*"
 Function,+,felica_load,_Bool,"FelicaData*, FlipperFormat*, uint32_t"
 Function,+,felica_poller_activate,FelicaError,"FelicaPoller*, FelicaData*"
-Function,+,felica_poller_read_blocks,FelicaError,"FelicaPoller*, const uint8_t, const uint8_t*, uint16_t, FelicaPollerReadCommandResponse**"
+Function,+,felica_poller_read_blocks,FelicaError,"FelicaPoller*, const uint8_t, const uint8_t* const, uint16_t, FelicaPollerReadCommandResponse** const"
 Function,+,felica_poller_sync_read,FelicaError,"Nfc*, FelicaData*, const FelicaCardKey*"
 Function,+,felica_reset,void,FelicaData*
 Function,+,felica_save,_Bool,"const FelicaData*, FlipperFormat*"
@@ -1402,23 +1402,23 @@ Function,+,furi_hal_hid_u2f_get_request,uint32_t,uint8_t*
 Function,+,furi_hal_hid_u2f_is_connected,_Bool,
 Function,+,furi_hal_hid_u2f_send_response,void,"uint8_t*, uint8_t"
 Function,+,furi_hal_hid_u2f_set_callback,void,"HidU2fCallback, void*"
-Function,+,furi_hal_i2c_acquire,void,FuriHalI2cBusHandle*
+Function,+,furi_hal_i2c_acquire,void,const FuriHalI2cBusHandle*
 Function,-,furi_hal_i2c_deinit_early,void,
 Function,-,furi_hal_i2c_init,void,
 Function,-,furi_hal_i2c_init_early,void,
-Function,+,furi_hal_i2c_is_device_ready,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint32_t"
-Function,+,furi_hal_i2c_read_mem,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_read_reg_16,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t*, uint32_t"
-Function,+,furi_hal_i2c_read_reg_8,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, uint32_t"
-Function,+,furi_hal_i2c_release,void,FuriHalI2cBusHandle*
-Function,+,furi_hal_i2c_rx,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_rx_ext,_Bool,"FuriHalI2cBusHandle*, uint16_t, _Bool, uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
-Function,+,furi_hal_i2c_trx,_Bool,"FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_tx,_Bool,"FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_tx_ext,_Bool,"FuriHalI2cBusHandle*, uint16_t, _Bool, const uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
-Function,+,furi_hal_i2c_write_mem,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, const uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_i2c_write_reg_16,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t, uint32_t"
-Function,+,furi_hal_i2c_write_reg_8,_Bool,"FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t, uint32_t"
+Function,+,furi_hal_i2c_is_device_ready,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint32_t"
+Function,+,furi_hal_i2c_read_mem,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_read_reg_16,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t*, uint32_t"
+Function,+,furi_hal_i2c_read_reg_8,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t*, uint32_t"
+Function,+,furi_hal_i2c_release,void,const FuriHalI2cBusHandle*
+Function,+,furi_hal_i2c_rx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_rx_ext,_Bool,"const FuriHalI2cBusHandle*, uint16_t, _Bool, uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
+Function,+,furi_hal_i2c_trx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_tx,_Bool,"const FuriHalI2cBusHandle*, uint8_t, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_tx_ext,_Bool,"const FuriHalI2cBusHandle*, uint16_t, _Bool, const uint8_t*, size_t, FuriHalI2cBegin, FuriHalI2cEnd, uint32_t"
+Function,+,furi_hal_i2c_write_mem,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_i2c_write_reg_16,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint16_t, uint32_t"
+Function,+,furi_hal_i2c_write_reg_8,_Bool,"const FuriHalI2cBusHandle*, uint8_t, uint8_t, uint8_t, uint32_t"
 Function,+,furi_hal_ibutton_emulate_set_next,void,uint32_t
 Function,+,furi_hal_ibutton_emulate_start,void,"uint32_t, FuriHalIbuttonEmulateCallback, void*"
 Function,+,furi_hal_ibutton_emulate_stop,void,
@@ -1663,20 +1663,20 @@ Function,+,furi_hal_speaker_release,void,
 Function,+,furi_hal_speaker_set_volume,void,float
 Function,+,furi_hal_speaker_start,void,"float, float"
 Function,+,furi_hal_speaker_stop,void,
-Function,+,furi_hal_spi_acquire,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_acquire,void,const FuriHalSpiBusHandle*
 Function,+,furi_hal_spi_bus_deinit,void,FuriHalSpiBus*
-Function,+,furi_hal_spi_bus_handle_deinit,void,FuriHalSpiBusHandle*
-Function,+,furi_hal_spi_bus_handle_init,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_bus_handle_deinit,void,const FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_bus_handle_init,void,const FuriHalSpiBusHandle*
 Function,+,furi_hal_spi_bus_init,void,FuriHalSpiBus*
-Function,+,furi_hal_spi_bus_rx,_Bool,"FuriHalSpiBusHandle*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_trx,_Bool,"FuriHalSpiBusHandle*, const uint8_t*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_trx_dma,_Bool,"FuriHalSpiBusHandle*, uint8_t*, uint8_t*, size_t, uint32_t"
-Function,+,furi_hal_spi_bus_tx,_Bool,"FuriHalSpiBusHandle*, const uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_rx,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_trx,_Bool,"const FuriHalSpiBusHandle*, const uint8_t*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_trx_dma,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, uint8_t*, size_t, uint32_t"
+Function,+,furi_hal_spi_bus_tx,_Bool,"const FuriHalSpiBusHandle*, const uint8_t*, size_t, uint32_t"
 Function,-,furi_hal_spi_config_deinit_early,void,
 Function,-,furi_hal_spi_config_init,void,
 Function,-,furi_hal_spi_config_init_early,void,
 Function,-,furi_hal_spi_dma_init,void,
-Function,+,furi_hal_spi_release,void,FuriHalSpiBusHandle*
+Function,+,furi_hal_spi_release,void,const FuriHalSpiBusHandle*
 Function,-,furi_hal_subghz_dump_state,void,
 Function,+,furi_hal_subghz_flush_rx,void,
 Function,+,furi_hal_subghz_flush_tx,void,
@@ -1719,7 +1719,7 @@ Function,+,furi_hal_usb_is_locked,_Bool,
 Function,+,furi_hal_usb_lock,void,
 Function,+,furi_hal_usb_reinit,void,
 Function,+,furi_hal_usb_set_config,_Bool,"FuriHalUsbInterface*, void*"
-Function,-,furi_hal_usb_set_state_callback,void,"FuriHalUsbStateCallback, void*"
+Function,+,furi_hal_usb_set_state_callback,void,"FuriHalUsbStateCallback, void*"
 Function,+,furi_hal_usb_unlock,void,
 Function,+,furi_hal_version_do_i_belong_here,_Bool,
 Function,+,furi_hal_version_get_ble_local_device_name_ptr,const char*,
@@ -1957,7 +1957,7 @@ Function,-,getchar,int,
 Function,-,getchar_unlocked,int,
 Function,-,getenv,char*,const char*
 Function,-,gets,char*,char*
-Function,-,getsubopt,int,"char**, char**, char**"
+Function,-,getsubopt,int,"char**, char* const*, char**"
 Function,-,getw,int,FILE*
 Function,+,gui_add_framebuffer_callback,void,"Gui*, GuiCanvasCommitCallback, void*"
 Function,+,gui_add_view_port,void,"Gui*, ViewPort*, GuiLayer"
@@ -2659,7 +2659,7 @@ Function,+,mf_ultralight_3des_decrypt,void,"mbedtls_des3_context*, const uint8_t
 Function,+,mf_ultralight_3des_encrypt,void,"mbedtls_des3_context*, const uint8_t*, const uint8_t*, const uint8_t*, const uint8_t, uint8_t*"
 Function,+,mf_ultralight_3des_get_key,const uint8_t*,const MfUltralightData*
 Function,+,mf_ultralight_3des_key_valid,_Bool,const MfUltralightData*
-Function,+,mf_ultralight_3des_shift_data,void,uint8_t*
+Function,+,mf_ultralight_3des_shift_data,void,uint8_t* const
 Function,+,mf_ultralight_alloc,MfUltralightData*,
 Function,+,mf_ultralight_copy,void,"MfUltralightData*, const MfUltralightData*"
 Function,+,mf_ultralight_detect_protocol,_Bool,const Iso14443_3aData*
@@ -3014,7 +3014,7 @@ Function,-,powl,long double,"long double, long double"
 Function,+,pretty_format_bytes_hex_canonical,void,"FuriString*, size_t, const char*, const uint8_t*, size_t"
 Function,-,printf,int,"const char*, ..."
 Function,+,property_value_out,void,"PropertyValueContext*, const char*, unsigned int, ..."
-Function,+,protocol_dict_alloc,ProtocolDict*,"const ProtocolBase**, size_t"
+Function,+,protocol_dict_alloc,ProtocolDict*,"const ProtocolBase* const*, size_t"
 Function,+,protocol_dict_decoders_feed,ProtocolId,"ProtocolDict*, _Bool, uint32_t"
 Function,+,protocol_dict_decoders_feed_by_feature,ProtocolId,"ProtocolDict*, uint32_t, _Bool, uint32_t"
 Function,+,protocol_dict_decoders_feed_by_id,ProtocolId,"ProtocolDict*, size_t, _Bool, uint32_t"
@@ -3202,29 +3202,29 @@ Function,+,srand,void,unsigned
 Function,-,srand48,void,long
 Function,-,srandom,void,unsigned
 Function,+,sscanf,int,"const char*, const char*, ..."
-Function,+,st25r3916_change_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_change_test_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_check_reg,_Bool,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_clear_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_direct_cmd,void,"FuriHalSpiBusHandle*, uint8_t"
-Function,+,st25r3916_get_irq,uint32_t,FuriHalSpiBusHandle*
-Function,+,st25r3916_mask_irq,void,"FuriHalSpiBusHandle*, uint32_t"
-Function,+,st25r3916_modify_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
-Function,+,st25r3916_read_burst_regs,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*, uint8_t"
-Function,+,st25r3916_read_fifo,_Bool,"FuriHalSpiBusHandle*, uint8_t*, size_t, size_t*"
-Function,+,st25r3916_read_pta_mem,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_read_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*"
-Function,+,st25r3916_read_test_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t*"
-Function,+,st25r3916_reg_read_fifo,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_reg_write_fifo,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_set_reg_bits,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_write_burst_regs,void,"FuriHalSpiBusHandle*, uint8_t, const uint8_t*, uint8_t"
-Function,+,st25r3916_write_fifo,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_pta_mem,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_ptf_mem,void,"FuriHalSpiBusHandle*, const uint8_t*, size_t"
-Function,+,st25r3916_write_pttsn_mem,void,"FuriHalSpiBusHandle*, uint8_t*, size_t"
-Function,+,st25r3916_write_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
-Function,+,st25r3916_write_test_reg,void,"FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_change_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_change_test_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_check_reg,_Bool,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_clear_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_direct_cmd,void,"const FuriHalSpiBusHandle*, uint8_t"
+Function,+,st25r3916_get_irq,uint32_t,const FuriHalSpiBusHandle*
+Function,+,st25r3916_mask_irq,void,"const FuriHalSpiBusHandle*, uint32_t"
+Function,+,st25r3916_modify_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t, uint8_t"
+Function,+,st25r3916_read_burst_regs,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*, uint8_t"
+Function,+,st25r3916_read_fifo,_Bool,"const FuriHalSpiBusHandle*, uint8_t*, size_t, size_t*"
+Function,+,st25r3916_read_pta_mem,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_read_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*"
+Function,+,st25r3916_read_test_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t*"
+Function,+,st25r3916_reg_read_fifo,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_reg_write_fifo,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_set_reg_bits,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_write_burst_regs,void,"const FuriHalSpiBusHandle*, uint8_t, const uint8_t*, uint8_t"
+Function,+,st25r3916_write_fifo,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_pta_mem,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_ptf_mem,void,"const FuriHalSpiBusHandle*, const uint8_t*, size_t"
+Function,+,st25r3916_write_pttsn_mem,void,"const FuriHalSpiBusHandle*, uint8_t*, size_t"
+Function,+,st25r3916_write_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
+Function,+,st25r3916_write_test_reg,void,"const FuriHalSpiBusHandle*, uint8_t, uint8_t"
 Function,+,st25tb_alloc,St25tbData*,
 Function,+,st25tb_copy,void,"St25tbData*, const St25tbData*"
 Function,+,st25tb_free,void,St25tbData*
@@ -3787,24 +3787,24 @@ Variable,-,__stdio_exit_handler,void (*)(),
 Variable,+,_ctype_,const char[],
 Variable,+,_impure_data,_reent,
 Variable,+,_impure_ptr,_reent*,
-Variable,-,_sys_errlist,const char*[],
+Variable,-,_sys_errlist,const char* const[],
 Variable,-,_sys_nerr,int,
 Variable,-,ble_profile_hid,const FuriHalBleProfileTemplate*,
-Variable,-,ble_profile_serial,const FuriHalBleProfileTemplate*,
-Variable,+,cli_vcp,CliSession,
+Variable,+,ble_profile_serial,const FuriHalBleProfileTemplate* const,
+Variable,+,cli_vcp,const CliSession,
 Variable,+,compress_config_heatshrink_default,const CompressConfigHeatshrink,
-Variable,+,firmware_api_interface,const ElfApiInterface*,
+Variable,+,firmware_api_interface,const ElfApiInterface* const,
 Variable,+,furi_hal_i2c_bus_external,FuriHalI2cBus,
 Variable,+,furi_hal_i2c_bus_power,FuriHalI2cBus,
-Variable,+,furi_hal_i2c_handle_external,FuriHalI2cBusHandle,
-Variable,+,furi_hal_i2c_handle_power,FuriHalI2cBusHandle,
+Variable,+,furi_hal_i2c_handle_external,const FuriHalI2cBusHandle,
+Variable,+,furi_hal_i2c_handle_power,const FuriHalI2cBusHandle,
 Variable,+,furi_hal_spi_bus_d,FuriHalSpiBus,
-Variable,+,furi_hal_spi_bus_handle_display,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_external,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_nfc,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_sd_fast,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_sd_slow,FuriHalSpiBusHandle,
-Variable,+,furi_hal_spi_bus_handle_subghz,FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_display,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_external,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_nfc,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_sd_fast,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_sd_slow,const FuriHalSpiBusHandle,
+Variable,+,furi_hal_spi_bus_handle_subghz,const FuriHalSpiBusHandle,
 Variable,+,furi_hal_spi_bus_r,FuriHalSpiBus,
 Variable,+,furi_hal_spi_preset_1edge_low_16m,const LL_SPI_InitTypeDef,
 Variable,+,furi_hal_spi_preset_1edge_low_2m,const LL_SPI_InitTypeDef,
@@ -3862,7 +3862,7 @@ Variable,+,gpio_usb_dp,const GpioPin,
 Variable,+,gpio_vibro,const GpioPin,
 Variable,+,input_pins,const InputPin[],
 Variable,+,input_pins_count,const size_t,
-Variable,+,lfrfid_protocols,const ProtocolBase*[],
+Variable,+,lfrfid_protocols,const ProtocolBase* const[],
 Variable,+,message_blink_set_color_blue,const NotificationMessage,
 Variable,+,message_blink_set_color_cyan,const NotificationMessage,
 Variable,+,message_blink_set_color_green,const NotificationMessage,
diff --git a/targets/f7/ble_glue/profiles/serial_profile.c b/targets/f7/ble_glue/profiles/serial_profile.c
index 1d414889f..427539427 100644
--- a/targets/f7/ble_glue/profiles/serial_profile.c
+++ b/targets/f7/ble_glue/profiles/serial_profile.c
@@ -46,7 +46,7 @@ static void ble_profile_serial_stop(FuriHalBleProfileBase* profile) {
 // Up to 45 ms
 #define CONNECTION_INTERVAL_MAX (0x24)
 
-static GapConfig serial_template_config = {
+static const GapConfig serial_template_config = {
     .adv_service_uuid = 0x3080,
     .appearance_char = 0x8600,
     .bonding_mode = true,
@@ -80,7 +80,7 @@ static const FuriHalBleProfileTemplate profile_callbacks = {
     .get_gap_config = ble_profile_serial_get_config,
 };
 
-const FuriHalBleProfileTemplate* ble_profile_serial = &profile_callbacks;
+const FuriHalBleProfileTemplate* const ble_profile_serial = &profile_callbacks;
 
 void ble_profile_serial_set_event_callback(
     FuriHalBleProfileBase* profile,
diff --git a/targets/f7/ble_glue/profiles/serial_profile.h b/targets/f7/ble_glue/profiles/serial_profile.h
index e07eaef03..7938bfc33 100644
--- a/targets/f7/ble_glue/profiles/serial_profile.h
+++ b/targets/f7/ble_glue/profiles/serial_profile.h
@@ -19,7 +19,7 @@ typedef enum {
 typedef SerialServiceEventCallback FuriHalBtSerialCallback;
 
 /** Serial profile descriptor */
-extern const FuriHalBleProfileTemplate* ble_profile_serial;
+extern const FuriHalBleProfileTemplate* const ble_profile_serial;
 
 /** Send data through BLE
  *
diff --git a/targets/f7/fatfs/user_diskio.c b/targets/f7/fatfs/user_diskio.c
index 85e5cad4f..963cb595f 100644
--- a/targets/f7/fatfs/user_diskio.c
+++ b/targets/f7/fatfs/user_diskio.c
@@ -9,7 +9,7 @@ static DRESULT driver_read(BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
 static DRESULT driver_write(BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
 static DRESULT driver_ioctl(BYTE pdrv, BYTE cmd, void* buff);
 
-Diskio_drvTypeDef sd_fatfs_driver = {
+const Diskio_drvTypeDef sd_fatfs_driver = {
     driver_initialize,
     driver_status,
     driver_read,
diff --git a/targets/f7/fatfs/user_diskio.h b/targets/f7/fatfs/user_diskio.h
index 009a17d4b..2505de704 100644
--- a/targets/f7/fatfs/user_diskio.h
+++ b/targets/f7/fatfs/user_diskio.h
@@ -6,7 +6,7 @@ extern "C" {
 
 #include "fatfs/ff_gen_drv.h"
 
-extern Diskio_drvTypeDef sd_fatfs_driver;
+extern const Diskio_drvTypeDef sd_fatfs_driver;
 
 #ifdef __cplusplus
 }
diff --git a/targets/f7/furi_hal/furi_hal_i2c.c b/targets/f7/furi_hal/furi_hal_i2c.c
index 71e1a5814..7eb9b4928 100644
--- a/targets/f7/furi_hal/furi_hal_i2c.c
+++ b/targets/f7/furi_hal/furi_hal_i2c.c
@@ -22,7 +22,7 @@ void furi_hal_i2c_init(void) {
     FURI_LOG_I(TAG, "Init OK");
 }
 
-void furi_hal_i2c_acquire(FuriHalI2cBusHandle* handle) {
+void furi_hal_i2c_acquire(const FuriHalI2cBusHandle* handle) {
     furi_hal_power_insomnia_enter();
     // Lock bus access
     handle->bus->callback(handle->bus, FuriHalI2cBusEventLock);
@@ -36,7 +36,7 @@ void furi_hal_i2c_acquire(FuriHalI2cBusHandle* handle) {
     handle->callback(handle, FuriHalI2cBusHandleEventActivate);
 }
 
-void furi_hal_i2c_release(FuriHalI2cBusHandle* handle) {
+void furi_hal_i2c_release(const FuriHalI2cBusHandle* handle) {
     // Ensure that current handle is our handle
     furi_check(handle->bus->current_handle == handle);
     // Deactivate handle
@@ -196,7 +196,7 @@ static bool furi_hal_i2c_transaction(
 }
 
 bool furi_hal_i2c_rx_ext(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint16_t address,
     bool ten_bit,
     uint8_t* data,
@@ -213,7 +213,7 @@ bool furi_hal_i2c_rx_ext(
 }
 
 bool furi_hal_i2c_tx_ext(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint16_t address,
     bool ten_bit,
     const uint8_t* data,
@@ -230,7 +230,7 @@ bool furi_hal_i2c_tx_ext(
 }
 
 bool furi_hal_i2c_tx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     const uint8_t* data,
     size_t size,
@@ -242,7 +242,7 @@ bool furi_hal_i2c_tx(
 }
 
 bool furi_hal_i2c_rx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     uint8_t* data,
     size_t size,
@@ -254,7 +254,7 @@ bool furi_hal_i2c_rx(
 }
 
 bool furi_hal_i2c_trx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     const uint8_t* tx_data,
     size_t tx_size,
@@ -281,7 +281,10 @@ bool furi_hal_i2c_trx(
                timeout);
 }
 
-bool furi_hal_i2c_is_device_ready(FuriHalI2cBusHandle* handle, uint8_t i2c_addr, uint32_t timeout) {
+bool furi_hal_i2c_is_device_ready(
+    const FuriHalI2cBusHandle* handle,
+    uint8_t i2c_addr,
+    uint32_t timeout) {
     furi_check(handle);
     furi_check(handle->bus->current_handle == handle);
     furi_check(timeout > 0);
@@ -314,7 +317,7 @@ bool furi_hal_i2c_is_device_ready(FuriHalI2cBusHandle* handle, uint8_t i2c_addr,
 }
 
 bool furi_hal_i2c_read_reg_8(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint8_t* data,
@@ -325,7 +328,7 @@ bool furi_hal_i2c_read_reg_8(
 }
 
 bool furi_hal_i2c_read_reg_16(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint16_t* data,
@@ -340,7 +343,7 @@ bool furi_hal_i2c_read_reg_16(
 }
 
 bool furi_hal_i2c_read_mem(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t mem_addr,
     uint8_t* data,
@@ -352,7 +355,7 @@ bool furi_hal_i2c_read_mem(
 }
 
 bool furi_hal_i2c_write_reg_8(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint8_t data,
@@ -368,7 +371,7 @@ bool furi_hal_i2c_write_reg_8(
 }
 
 bool furi_hal_i2c_write_reg_16(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint16_t data,
@@ -385,7 +388,7 @@ bool furi_hal_i2c_write_reg_16(
 }
 
 bool furi_hal_i2c_write_mem(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t mem_addr,
     const uint8_t* data,
diff --git a/targets/f7/furi_hal/furi_hal_i2c_config.c b/targets/f7/furi_hal/furi_hal_i2c_config.c
index f9d88abb3..b10c53d32 100644
--- a/targets/f7/furi_hal/furi_hal_i2c_config.c
+++ b/targets/f7/furi_hal/furi_hal_i2c_config.c
@@ -74,7 +74,7 @@ FuriHalI2cBus furi_hal_i2c_bus_external = {
 };
 
 void furi_hal_i2c_bus_handle_power_event(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     FuriHalI2cBusHandleEvent event) {
     if(event == FuriHalI2cBusHandleEventActivate) {
         furi_hal_gpio_init_ex(
@@ -120,13 +120,13 @@ void furi_hal_i2c_bus_handle_power_event(
     }
 }
 
-FuriHalI2cBusHandle furi_hal_i2c_handle_power = {
+const FuriHalI2cBusHandle furi_hal_i2c_handle_power = {
     .bus = &furi_hal_i2c_bus_power,
     .callback = furi_hal_i2c_bus_handle_power_event,
 };
 
 void furi_hal_i2c_bus_handle_external_event(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     FuriHalI2cBusHandleEvent event) {
     if(event == FuriHalI2cBusHandleEventActivate) {
         furi_hal_gpio_init_ex(
@@ -160,7 +160,7 @@ void furi_hal_i2c_bus_handle_external_event(
     }
 }
 
-FuriHalI2cBusHandle furi_hal_i2c_handle_external = {
+const FuriHalI2cBusHandle furi_hal_i2c_handle_external = {
     .bus = &furi_hal_i2c_bus_external,
     .callback = furi_hal_i2c_bus_handle_external_event,
 };
diff --git a/targets/f7/furi_hal/furi_hal_i2c_config.h b/targets/f7/furi_hal/furi_hal_i2c_config.h
index a8fb91835..28bd09a0a 100644
--- a/targets/f7/furi_hal/furi_hal_i2c_config.h
+++ b/targets/f7/furi_hal/furi_hal_i2c_config.h
@@ -17,14 +17,14 @@ extern FuriHalI2cBus furi_hal_i2c_bus_external;
  * Pins: PA9(SCL) / PA10(SDA), float on release
  * Params: 400khz
  */
-extern FuriHalI2cBusHandle furi_hal_i2c_handle_power;
+extern const FuriHalI2cBusHandle furi_hal_i2c_handle_power;
 
 /** Handle for external i2c bus
  * Bus: furi_hal_i2c_bus_external
  * Pins: PC0(SCL) / PC1(SDA), float on release
  * Params: 100khz
  */
-extern FuriHalI2cBusHandle furi_hal_i2c_handle_external;
+extern const FuriHalI2cBusHandle furi_hal_i2c_handle_external;
 
 #ifdef __cplusplus
 }
diff --git a/targets/f7/furi_hal/furi_hal_i2c_types.h b/targets/f7/furi_hal/furi_hal_i2c_types.h
index 13f361054..0a35137b0 100644
--- a/targets/f7/furi_hal/furi_hal_i2c_types.h
+++ b/targets/f7/furi_hal/furi_hal_i2c_types.h
@@ -25,7 +25,7 @@ typedef void (*FuriHalI2cBusEventCallback)(FuriHalI2cBus* bus, FuriHalI2cBusEven
 /** FuriHal i2c bus */
 struct FuriHalI2cBus {
     I2C_TypeDef* i2c;
-    FuriHalI2cBusHandle* current_handle;
+    const FuriHalI2cBusHandle* current_handle;
     FuriHalI2cBusEventCallback callback;
 };
 
@@ -37,7 +37,7 @@ typedef enum {
 
 /** FuriHal i2c handle event callback */
 typedef void (*FuriHalI2cBusHandleEventCallback)(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     FuriHalI2cBusHandleEvent event);
 
 /** FuriHal i2c handle */
diff --git a/targets/f7/furi_hal/furi_hal_nfc.c b/targets/f7/furi_hal/furi_hal_nfc.c
index ee7a04e45..d8dc0c618 100644
--- a/targets/f7/furi_hal/furi_hal_nfc.c
+++ b/targets/f7/furi_hal/furi_hal_nfc.c
@@ -8,7 +8,7 @@
 
 #define TAG "FuriHalNfc"
 
-const FuriHalNfcTechBase* furi_hal_nfc_tech[FuriHalNfcTechNum] = {
+const FuriHalNfcTechBase* const furi_hal_nfc_tech[FuriHalNfcTechNum] = {
     [FuriHalNfcTechIso14443a] = &furi_hal_nfc_iso14443a,
     [FuriHalNfcTechIso14443b] = &furi_hal_nfc_iso14443b,
     [FuriHalNfcTechIso15693] = &furi_hal_nfc_iso15693,
@@ -18,7 +18,7 @@ const FuriHalNfcTechBase* furi_hal_nfc_tech[FuriHalNfcTechNum] = {
 
 FuriHalNfc furi_hal_nfc;
 
-static FuriHalNfcError furi_hal_nfc_turn_on_osc(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_turn_on_osc(const FuriHalSpiBusHandle* handle) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
     furi_hal_nfc_event_start();
 
@@ -53,7 +53,7 @@ FuriHalNfcError furi_hal_nfc_is_hal_ready(void) {
         error = furi_hal_nfc_acquire();
         if(error != FuriHalNfcErrorNone) break;
 
-        FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+        const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
         uint8_t chip_id = 0;
         st25r3916_read_reg(handle, ST25R3916_REG_IC_IDENTITY, &chip_id);
         if((chip_id & ST25R3916_REG_IC_IDENTITY_ic_type_mask) !=
@@ -83,7 +83,7 @@ FuriHalNfcError furi_hal_nfc_init(void) {
             furi_hal_nfc_low_power_mode_start();
         }
 
-        FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+        const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
         // Set default state
         st25r3916_direct_cmd(handle, ST25R3916_CMD_SET_DEFAULT);
         // Increase IO driver strength of MISO and IRQ
@@ -282,7 +282,7 @@ FuriHalNfcError furi_hal_nfc_release(void) {
 
 FuriHalNfcError furi_hal_nfc_low_power_mode_start(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_direct_cmd(handle, ST25R3916_CMD_STOP);
     st25r3916_clear_reg_bits(
@@ -300,7 +300,7 @@ FuriHalNfcError furi_hal_nfc_low_power_mode_start(void) {
 
 FuriHalNfcError furi_hal_nfc_low_power_mode_stop(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     do {
         furi_hal_nfc_init_gpio_isr();
@@ -318,7 +318,7 @@ FuriHalNfcError furi_hal_nfc_low_power_mode_stop(void) {
     return error;
 }
 
-static FuriHalNfcError furi_hal_nfc_poller_init_common(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_poller_init_common(const FuriHalSpiBusHandle* handle) {
     // Disable wake up
     st25r3916_clear_reg_bits(handle, ST25R3916_REG_OP_CONTROL, ST25R3916_REG_OP_CONTROL_wu);
     // Enable correlator
@@ -339,7 +339,7 @@ static FuriHalNfcError furi_hal_nfc_poller_init_common(FuriHalSpiBusHandle* hand
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_listener_init_common(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_listener_init_common(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     // No common listener configuration
     return FuriHalNfcErrorNone;
@@ -349,7 +349,7 @@ FuriHalNfcError furi_hal_nfc_set_mode(FuriHalNfcMode mode, FuriHalNfcTech tech)
     furi_check(mode < FuriHalNfcModeNum);
     furi_check(tech < FuriHalNfcTechNum);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     FuriHalNfcError error = FuriHalNfcErrorNone;
 
@@ -375,7 +375,7 @@ FuriHalNfcError furi_hal_nfc_set_mode(FuriHalNfcMode mode, FuriHalNfcTech tech)
 
 FuriHalNfcError furi_hal_nfc_reset_mode(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_direct_cmd(handle, ST25R3916_CMD_STOP);
 
@@ -415,7 +415,7 @@ FuriHalNfcError furi_hal_nfc_reset_mode(void) {
 
 FuriHalNfcError furi_hal_nfc_field_detect_start(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_write_reg(
         handle,
@@ -429,7 +429,7 @@ FuriHalNfcError furi_hal_nfc_field_detect_start(void) {
 
 FuriHalNfcError furi_hal_nfc_field_detect_stop(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_clear_reg_bits(
         handle,
@@ -441,7 +441,7 @@ FuriHalNfcError furi_hal_nfc_field_detect_stop(void) {
 
 bool furi_hal_nfc_field_is_present(void) {
     bool is_present = false;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     if(st25r3916_check_reg(
            handle,
@@ -456,7 +456,7 @@ bool furi_hal_nfc_field_is_present(void) {
 
 FuriHalNfcError furi_hal_nfc_poller_field_on(void) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     if(!st25r3916_check_reg(
            handle,
@@ -476,7 +476,7 @@ FuriHalNfcError furi_hal_nfc_poller_field_on(void) {
 }
 
 FuriHalNfcError furi_hal_nfc_poller_tx_common(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     furi_check(tx_data);
@@ -508,7 +508,7 @@ FuriHalNfcError furi_hal_nfc_poller_tx_common(
 }
 
 FuriHalNfcError furi_hal_nfc_common_fifo_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     FuriHalNfcError err = FuriHalNfcErrorNone;
@@ -523,7 +523,7 @@ FuriHalNfcError furi_hal_nfc_common_fifo_tx(
 FuriHalNfcError furi_hal_nfc_poller_tx(const uint8_t* tx_data, size_t tx_bits) {
     furi_check(furi_hal_nfc.mode == FuriHalNfcModePoller);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->poller.tx(handle, tx_data, tx_bits);
 }
@@ -531,7 +531,7 @@ FuriHalNfcError furi_hal_nfc_poller_tx(const uint8_t* tx_data, size_t tx_bits) {
 FuriHalNfcError furi_hal_nfc_poller_rx(uint8_t* rx_data, size_t rx_data_size, size_t* rx_bits) {
     furi_check(furi_hal_nfc.mode == FuriHalNfcModePoller);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->poller.rx(handle, rx_data, rx_data_size, rx_bits);
 }
@@ -556,12 +556,12 @@ FuriHalNfcError furi_hal_nfc_listener_tx(const uint8_t* tx_data, size_t tx_bits)
     furi_check(furi_hal_nfc.mode == FuriHalNfcModeListener);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->listener.tx(handle, tx_data, tx_bits);
 }
 
 FuriHalNfcError furi_hal_nfc_common_fifo_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* rx_data,
     size_t rx_data_size,
     size_t* rx_bits) {
@@ -581,13 +581,13 @@ FuriHalNfcError furi_hal_nfc_listener_rx(uint8_t* rx_data, size_t rx_data_size,
     furi_check(furi_hal_nfc.mode == FuriHalNfcModeListener);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->listener.rx(
         handle, rx_data, rx_data_size, rx_bits);
 }
 
 FuriHalNfcError furi_hal_nfc_trx_reset(void) {
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_direct_cmd(handle, ST25R3916_CMD_STOP);
 
@@ -598,7 +598,7 @@ FuriHalNfcError furi_hal_nfc_listener_sleep(void) {
     furi_check(furi_hal_nfc.mode == FuriHalNfcModeListener);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->listener.sleep(handle);
 }
@@ -607,13 +607,13 @@ FuriHalNfcError furi_hal_nfc_listener_idle(void) {
     furi_check(furi_hal_nfc.mode == FuriHalNfcModeListener);
     furi_check(furi_hal_nfc.tech < FuriHalNfcTechNum);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     return furi_hal_nfc_tech[furi_hal_nfc.tech]->listener.idle(handle);
 }
 
 FuriHalNfcError furi_hal_nfc_listener_enable_rx(void) {
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_direct_cmd(handle, ST25R3916_CMD_UNMASK_RECEIVE_DATA);
 
diff --git a/targets/f7/furi_hal/furi_hal_nfc_event.c b/targets/f7/furi_hal/furi_hal_nfc_event.c
index 9bcd2f1fe..56681b4fe 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_event.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_event.c
@@ -48,7 +48,7 @@ FuriHalNfcEvent furi_hal_nfc_wait_event_common(uint32_t timeout_ms) {
     if(event_flag != (unsigned)FuriFlagErrorTimeout) {
         if(event_flag & FuriHalNfcEventInternalTypeIrq) {
             furi_thread_flags_clear(FuriHalNfcEventInternalTypeIrq);
-            FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+            const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
             uint32_t irq = furi_hal_nfc_get_irq(handle);
             if(irq & ST25R3916_IRQ_MASK_OSC) {
                 event |= FuriHalNfcEventOscOn;
@@ -101,7 +101,7 @@ FuriHalNfcEvent furi_hal_nfc_wait_event_common(uint32_t timeout_ms) {
 }
 
 bool furi_hal_nfc_event_wait_for_specific_irq(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint32_t mask,
     uint32_t timeout_ms) {
     furi_check(furi_hal_nfc_event);
diff --git a/targets/f7/furi_hal/furi_hal_nfc_felica.c b/targets/f7/furi_hal/furi_hal_nfc_felica.c
index 6c3f55525..1267b7b13 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_felica.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_felica.c
@@ -18,7 +18,7 @@ typedef struct {
 } FuriHalFelicaPtMemory;
 #pragma pack(pop)
 
-static FuriHalNfcError furi_hal_nfc_felica_poller_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_felica_poller_init(const FuriHalSpiBusHandle* handle) {
     // Enable Felica mode, AM modulation
     st25r3916_change_reg_bits(
         handle,
@@ -61,13 +61,13 @@ static FuriHalNfcError furi_hal_nfc_felica_poller_init(FuriHalSpiBusHandle* hand
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_felica_poller_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_felica_poller_deinit(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
 
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_felica_listener_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_felica_listener_init(const FuriHalSpiBusHandle* handle) {
     furi_assert(handle);
     st25r3916_direct_cmd(handle, ST25R3916_CMD_SET_DEFAULT);
     st25r3916_write_reg(
@@ -141,7 +141,7 @@ static FuriHalNfcError furi_hal_nfc_felica_listener_init(FuriHalSpiBusHandle* ha
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_felica_listener_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_felica_listener_deinit(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     return FuriHalNfcErrorNone;
 }
@@ -154,19 +154,19 @@ static FuriHalNfcEvent furi_hal_nfc_felica_listener_wait_event(uint32_t timeout_
 }
 
 FuriHalNfcError furi_hal_nfc_felica_listener_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     furi_hal_nfc_common_fifo_tx(handle, tx_data, tx_bits);
     return FuriHalNfcErrorNone;
 }
 
-FuriHalNfcError furi_hal_nfc_felica_listener_sleep(FuriHalSpiBusHandle* handle) {
+FuriHalNfcError furi_hal_nfc_felica_listener_sleep(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     return FuriHalNfcErrorNone;
 }
 
-FuriHalNfcError furi_hal_nfc_felica_listener_idle(FuriHalSpiBusHandle* handle) {
+FuriHalNfcError furi_hal_nfc_felica_listener_idle(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     return FuriHalNfcErrorNone;
 }
@@ -182,7 +182,7 @@ FuriHalNfcError furi_hal_nfc_felica_listener_set_sensf_res_data(
     furi_check(idm_len == FURI_HAL_FELICA_IDM_PMM_LENGTH);
     furi_check(pmm_len == FURI_HAL_FELICA_IDM_PMM_LENGTH);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
     // Write PT Memory
     FuriHalFelicaPtMemory pt;
     pt.system_code = sys_code;
diff --git a/targets/f7/furi_hal/furi_hal_nfc_i.h b/targets/f7/furi_hal/furi_hal_nfc_i.h
index 084196451..5b0f8e68d 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_i.h
+++ b/targets/f7/furi_hal/furi_hal_nfc_i.h
@@ -104,7 +104,7 @@ void furi_hal_nfc_timers_deinit(void);
  * @param[in,out] handle pointer to the SPI handle associated with the NFC chip.
  * @returns bitmask of zero or more occurred interrupts.
  */
-uint32_t furi_hal_nfc_get_irq(FuriHalSpiBusHandle* handle);
+uint32_t furi_hal_nfc_get_irq(const FuriHalSpiBusHandle* handle);
 
 /**
  * @brief Wait until a specified type of interrupt occurs.
@@ -115,7 +115,7 @@ uint32_t furi_hal_nfc_get_irq(FuriHalSpiBusHandle* handle);
  * @returns true if specified interrupt(s) have occured within timeout, false otherwise.
  */
 bool furi_hal_nfc_event_wait_for_specific_irq(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint32_t mask,
     uint32_t timeout_ms);
 
@@ -137,7 +137,7 @@ FuriHalNfcEvent furi_hal_nfc_wait_event_common(uint32_t timeout_ms);
  * @param[in,out] handle pointer to the SPI handle associated with the NFC chip.
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
-FuriHalNfcError furi_hal_nfc_common_listener_rx_start(FuriHalSpiBusHandle* handle);
+FuriHalNfcError furi_hal_nfc_common_listener_rx_start(const FuriHalSpiBusHandle* handle);
 
 /**
  * @brief Transmit data using on-chip FIFO.
@@ -150,7 +150,7 @@ FuriHalNfcError furi_hal_nfc_common_listener_rx_start(FuriHalSpiBusHandle* handl
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
 FuriHalNfcError furi_hal_nfc_common_fifo_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits);
 
@@ -166,7 +166,7 @@ FuriHalNfcError furi_hal_nfc_common_fifo_tx(
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
 FuriHalNfcError furi_hal_nfc_common_fifo_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* rx_data,
     size_t rx_data_size,
     size_t* rx_bits);
@@ -182,7 +182,7 @@ FuriHalNfcError furi_hal_nfc_common_fifo_rx(
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
 FuriHalNfcError furi_hal_nfc_poller_tx_common(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits);
 
diff --git a/targets/f7/furi_hal/furi_hal_nfc_irq.c b/targets/f7/furi_hal/furi_hal_nfc_irq.c
index 90373955f..50a0139fd 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_irq.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_irq.c
@@ -8,7 +8,7 @@ static void furi_hal_nfc_int_callback(void* context) {
     furi_hal_nfc_event_set(FuriHalNfcEventInternalTypeIrq);
 }
 
-uint32_t furi_hal_nfc_get_irq(FuriHalSpiBusHandle* handle) {
+uint32_t furi_hal_nfc_get_irq(const FuriHalSpiBusHandle* handle) {
     uint32_t irq = 0;
     while(furi_hal_gpio_read_port_pin(gpio_nfc_irq_rfid_pull.port, gpio_nfc_irq_rfid_pull.pin)) {
         irq |= st25r3916_get_irq(handle);
diff --git a/targets/f7/furi_hal/furi_hal_nfc_iso14443a.c b/targets/f7/furi_hal/furi_hal_nfc_iso14443a.c
index 1ef23dfa4..be7a17264 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_iso14443a.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_iso14443a.c
@@ -13,7 +13,7 @@
 
 static Iso14443_3aSignal* iso14443_3a_signal = NULL;
 
-static FuriHalNfcError furi_hal_nfc_iso14443a_common_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443a_common_init(const FuriHalSpiBusHandle* handle) {
     // Common NFC-A settings, 106 kbps
 
     // 1st stage zero = 600kHz, 3rd stage zero = 200 kHz
@@ -40,7 +40,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443a_common_init(FuriHalSpiBusHandle* h
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443a_poller_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443a_poller_init(const FuriHalSpiBusHandle* handle) {
     // Enable ISO14443A mode, OOK modulation
     st25r3916_change_reg_bits(
         handle,
@@ -57,7 +57,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443a_poller_init(FuriHalSpiBusHandle* h
     return furi_hal_nfc_iso14443a_common_init(handle);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443a_poller_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443a_poller_deinit(const FuriHalSpiBusHandle* handle) {
     st25r3916_change_reg_bits(
         handle,
         ST25R3916_REG_ISO14443A_NFC,
@@ -67,7 +67,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443a_poller_deinit(FuriHalSpiBusHandle*
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443a_listener_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443a_listener_init(const FuriHalSpiBusHandle* handle) {
     furi_check(iso14443_3a_signal == NULL);
     iso14443_3a_signal = iso14443_3a_signal_alloc(&gpio_spi_r_mosi);
 
@@ -105,7 +105,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443a_listener_init(FuriHalSpiBusHandle*
     return furi_hal_nfc_iso14443a_common_init(handle);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443a_listener_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443a_listener_deinit(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
 
     if(iso14443_3a_signal) {
@@ -118,7 +118,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443a_listener_deinit(FuriHalSpiBusHandl
 
 static FuriHalNfcEvent furi_hal_nfc_iso14443_3a_listener_wait_event(uint32_t timeout_ms) {
     FuriHalNfcEvent event = furi_hal_nfc_wait_event_common(timeout_ms);
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     if(event & FuriHalNfcEventListenerActive) {
         st25r3916_set_reg_bits(
@@ -131,7 +131,7 @@ static FuriHalNfcEvent furi_hal_nfc_iso14443_3a_listener_wait_event(uint32_t tim
 FuriHalNfcError furi_hal_nfc_iso14443a_poller_trx_short_frame(FuriHalNfcaShortFrame frame) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     // Disable crc check
     st25r3916_set_reg_bits(handle, ST25R3916_REG_AUX, ST25R3916_REG_AUX_no_crc_rx);
@@ -185,7 +185,7 @@ FuriHalNfcError
     furi_check(tx_data);
 
     FuriHalNfcError err = FuriHalNfcErrorNone;
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     // Prepare tx
     st25r3916_direct_cmd(handle, ST25R3916_CMD_CLEAR_FIFO);
@@ -220,7 +220,7 @@ FuriHalNfcError furi_hal_nfc_iso14443a_listener_set_col_res_data(
 
     FuriHalNfcError error = FuriHalNfcErrorNone;
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     // Set 4 or 7 bytes UID
     if(uid_len == 4) {
@@ -255,7 +255,7 @@ FuriHalNfcError furi_hal_nfc_iso14443a_listener_set_col_res_data(
 }
 
 FuriHalNfcError furi_hal_nfc_iso4443a_listener_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     FuriHalNfcError error = FuriHalNfcErrorNone;
@@ -284,7 +284,7 @@ FuriHalNfcError furi_hal_nfc_iso14443a_listener_tx_custom_parity(
 
     furi_check(iso14443_3a_signal);
 
-    FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
+    const FuriHalSpiBusHandle* handle = &furi_hal_spi_bus_handle_nfc;
 
     st25r3916_direct_cmd(handle, ST25R3916_CMD_TRANSPARENT_MODE);
     // Reconfigure gpio for Transparent mode
@@ -303,7 +303,7 @@ FuriHalNfcError furi_hal_nfc_iso14443a_listener_tx_custom_parity(
     return FuriHalNfcErrorNone;
 }
 
-FuriHalNfcError furi_hal_nfc_iso14443_3a_listener_sleep(FuriHalSpiBusHandle* handle) {
+FuriHalNfcError furi_hal_nfc_iso14443_3a_listener_sleep(const FuriHalSpiBusHandle* handle) {
     // Enable auto collision resolution
     st25r3916_clear_reg_bits(
         handle, ST25R3916_REG_PASSIVE_TARGET, ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a);
@@ -313,7 +313,7 @@ FuriHalNfcError furi_hal_nfc_iso14443_3a_listener_sleep(FuriHalSpiBusHandle* han
     return FuriHalNfcErrorNone;
 }
 
-FuriHalNfcError furi_hal_nfc_iso14443_3a_listener_idle(FuriHalSpiBusHandle* handle) {
+FuriHalNfcError furi_hal_nfc_iso14443_3a_listener_idle(const FuriHalSpiBusHandle* handle) {
     // Enable auto collision resolution
     st25r3916_clear_reg_bits(
         handle, ST25R3916_REG_PASSIVE_TARGET, ST25R3916_REG_PASSIVE_TARGET_d_106_ac_a);
diff --git a/targets/f7/furi_hal/furi_hal_nfc_iso14443b.c b/targets/f7/furi_hal/furi_hal_nfc_iso14443b.c
index bb1a63515..315223e2f 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_iso14443b.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_iso14443b.c
@@ -1,7 +1,7 @@
 #include "furi_hal_nfc_i.h"
 #include "furi_hal_nfc_tech_i.h"
 
-static FuriHalNfcError furi_hal_nfc_iso14443b_common_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443b_common_init(const FuriHalSpiBusHandle* handle) {
     // Common NFC-B settings, 106kbps
 
     // 1st stage zero = 60kHz, 3rd stage zero = 200 kHz
@@ -40,7 +40,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443b_common_init(FuriHalSpiBusHandle* h
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443b_poller_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443b_poller_init(const FuriHalSpiBusHandle* handle) {
     // Enable ISO14443B mode, AM modulation
     st25r3916_change_reg_bits(
         handle,
@@ -84,7 +84,7 @@ static FuriHalNfcError furi_hal_nfc_iso14443b_poller_init(FuriHalSpiBusHandle* h
     return furi_hal_nfc_iso14443b_common_init(handle);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso14443b_poller_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso14443b_poller_deinit(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     return FuriHalNfcErrorNone;
 }
diff --git a/targets/f7/furi_hal/furi_hal_nfc_iso15693.c b/targets/f7/furi_hal/furi_hal_nfc_iso15693.c
index 3245b67cc..d35b160f4 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_iso15693.c
+++ b/targets/f7/furi_hal/furi_hal_nfc_iso15693.c
@@ -74,7 +74,7 @@ static void furi_hal_nfc_iso15693_poller_free(FuriHalNfcIso15693Poller* instance
     free(instance);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso15693_common_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso15693_common_init(const FuriHalSpiBusHandle* handle) {
     // Common NFC-V settings, 26.48 kbps
 
     // 1st stage zero = 12 kHz, 3rd stage zero = 80 kHz, low-pass = 600 kHz
@@ -112,7 +112,7 @@ static FuriHalNfcError furi_hal_nfc_iso15693_common_init(FuriHalSpiBusHandle* ha
     return FuriHalNfcErrorNone;
 }
 
-static FuriHalNfcError furi_hal_nfc_iso15693_poller_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso15693_poller_init(const FuriHalSpiBusHandle* handle) {
     furi_check(furi_hal_nfc_iso15693_poller == NULL);
 
     furi_hal_nfc_iso15693_poller = furi_hal_nfc_iso15693_poller_alloc();
@@ -141,7 +141,7 @@ static FuriHalNfcError furi_hal_nfc_iso15693_poller_init(FuriHalSpiBusHandle* ha
     return furi_hal_nfc_iso15693_common_init(handle);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso15693_poller_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso15693_poller_deinit(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
     furi_check(furi_hal_nfc_iso15693_poller);
 
@@ -238,7 +238,7 @@ static FuriHalNfcError iso15693_3_poller_decode_frame(
 }
 
 static FuriHalNfcError furi_hal_nfc_iso15693_poller_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     FuriHalNfcIso15693Poller* instance = furi_hal_nfc_iso15693_poller;
@@ -252,7 +252,7 @@ static FuriHalNfcError furi_hal_nfc_iso15693_poller_tx(
 }
 
 static FuriHalNfcError furi_hal_nfc_iso15693_poller_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* rx_data,
     size_t rx_data_size,
     size_t* rx_bits) {
@@ -284,14 +284,16 @@ static FuriHalNfcError furi_hal_nfc_iso15693_poller_rx(
     return error;
 }
 
-static void furi_hal_nfc_iso15693_listener_transparent_mode_enter(FuriHalSpiBusHandle* handle) {
+static void
+    furi_hal_nfc_iso15693_listener_transparent_mode_enter(const FuriHalSpiBusHandle* handle) {
     st25r3916_direct_cmd(handle, ST25R3916_CMD_TRANSPARENT_MODE);
 
     furi_hal_spi_bus_handle_deinit(handle);
     furi_hal_nfc_deinit_gpio_isr();
 }
 
-static void furi_hal_nfc_iso15693_listener_transparent_mode_exit(FuriHalSpiBusHandle* handle) {
+static void
+    furi_hal_nfc_iso15693_listener_transparent_mode_exit(const FuriHalSpiBusHandle* handle) {
     // Configure gpio back to SPI and exit transparent mode
     furi_hal_nfc_init_gpio_isr();
     furi_hal_spi_bus_handle_init(handle);
@@ -299,7 +301,7 @@ static void furi_hal_nfc_iso15693_listener_transparent_mode_exit(FuriHalSpiBusHa
     st25r3916_direct_cmd(handle, ST25R3916_CMD_UNMASK_RECEIVE_DATA);
 }
 
-static FuriHalNfcError furi_hal_nfc_iso15693_listener_init(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso15693_listener_init(const FuriHalSpiBusHandle* handle) {
     furi_check(furi_hal_nfc_iso15693_listener == NULL);
 
     furi_hal_nfc_iso15693_listener = furi_hal_nfc_iso15693_listener_alloc();
@@ -328,7 +330,7 @@ static FuriHalNfcError furi_hal_nfc_iso15693_listener_init(FuriHalSpiBusHandle*
     return error;
 }
 
-static FuriHalNfcError furi_hal_nfc_iso15693_listener_deinit(FuriHalSpiBusHandle* handle) {
+static FuriHalNfcError furi_hal_nfc_iso15693_listener_deinit(const FuriHalSpiBusHandle* handle) {
     furi_check(furi_hal_nfc_iso15693_listener);
 
     furi_hal_nfc_iso15693_listener_transparent_mode_exit(handle);
@@ -387,7 +389,7 @@ static FuriHalNfcEvent furi_hal_nfc_iso15693_wait_event(uint32_t timeout_ms) {
 }
 
 static FuriHalNfcError furi_hal_nfc_iso15693_listener_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_data,
     size_t tx_bits) {
     UNUSED(handle);
@@ -407,7 +409,7 @@ FuriHalNfcError furi_hal_nfc_iso15693_listener_tx_sof(void) {
 }
 
 static FuriHalNfcError furi_hal_nfc_iso15693_listener_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* rx_data,
     size_t rx_data_size,
     size_t* rx_bits) {
@@ -425,7 +427,7 @@ static FuriHalNfcError furi_hal_nfc_iso15693_listener_rx(
     return FuriHalNfcErrorNone;
 }
 
-FuriHalNfcError furi_hal_nfc_iso15693_listener_sleep(FuriHalSpiBusHandle* handle) {
+FuriHalNfcError furi_hal_nfc_iso15693_listener_sleep(const FuriHalSpiBusHandle* handle) {
     UNUSED(handle);
 
     return FuriHalNfcErrorNone;
diff --git a/targets/f7/furi_hal/furi_hal_nfc_tech_i.h b/targets/f7/furi_hal/furi_hal_nfc_tech_i.h
index e36dc852e..4a62f67c9 100644
--- a/targets/f7/furi_hal/furi_hal_nfc_tech_i.h
+++ b/targets/f7/furi_hal/furi_hal_nfc_tech_i.h
@@ -25,7 +25,7 @@ extern "C" {
  * @param[in,out] handle pointer to the NFC chip SPI handle.
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
-typedef FuriHalNfcError (*FuriHalNfcChipConfig)(FuriHalSpiBusHandle* handle);
+typedef FuriHalNfcError (*FuriHalNfcChipConfig)(const FuriHalSpiBusHandle* handle);
 
 /**
  * @brief Transmit data using technology-specific framing and timings.
@@ -36,7 +36,7 @@ typedef FuriHalNfcError (*FuriHalNfcChipConfig)(FuriHalSpiBusHandle* handle);
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
 typedef FuriHalNfcError (
-    *FuriHalNfcTx)(FuriHalSpiBusHandle* handle, const uint8_t* tx_data, size_t tx_bits);
+    *FuriHalNfcTx)(const FuriHalSpiBusHandle* handle, const uint8_t* tx_data, size_t tx_bits);
 
 /**
  * @brief Receive data using technology-specific framing and timings.
@@ -48,7 +48,7 @@ typedef FuriHalNfcError (
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
 typedef FuriHalNfcError (*FuriHalNfcRx)(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* rx_data,
     size_t rx_data_size,
     size_t* rx_bits);
@@ -69,7 +69,7 @@ typedef FuriHalNfcEvent (*FuriHalNfcWaitEvent)(uint32_t timeout_ms);
  * @param[in,out] handle pointer to the NFC chip SPI handle.
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
-typedef FuriHalNfcError (*FuriHalNfcSleep)(FuriHalSpiBusHandle* handle);
+typedef FuriHalNfcError (*FuriHalNfcSleep)(const FuriHalSpiBusHandle* handle);
 
 /**
  * @brief Go to idle in listener mode.
@@ -79,7 +79,7 @@ typedef FuriHalNfcError (*FuriHalNfcSleep)(FuriHalSpiBusHandle* handle);
  * @param[in,out] handle pointer to the NFC chip SPI handle.
  * @returns FuriHalNfcErrorNone on success, any other error code on failure.
  */
-typedef FuriHalNfcError (*FuriHalNfcIdle)(FuriHalSpiBusHandle* handle);
+typedef FuriHalNfcError (*FuriHalNfcIdle)(const FuriHalSpiBusHandle* handle);
 
 /**
  * @brief Technology-specific compenstaion values for pollers.
@@ -160,7 +160,7 @@ extern const FuriHalNfcTechBase furi_hal_nfc_felica;
  * This variable is defined in furi_hal_nfc.c. It will need to be modified
  * in case when a new technology is to be added.
  */
-extern const FuriHalNfcTechBase* furi_hal_nfc_tech[];
+extern const FuriHalNfcTechBase* const furi_hal_nfc_tech[];
 
 #ifdef __cplusplus
 }
diff --git a/targets/f7/furi_hal/furi_hal_sd.c b/targets/f7/furi_hal/furi_hal_sd.c
index eca5b6da9..152192736 100644
--- a/targets/f7/furi_hal/furi_hal_sd.c
+++ b/targets/f7/furi_hal/furi_hal_sd.c
@@ -204,7 +204,7 @@ typedef struct {
 } SD_CardInfo;
 
 /** Pointer to currently used SPI Handle */
-FuriHalSpiBusHandle* furi_hal_sd_spi_handle = NULL;
+const FuriHalSpiBusHandle* furi_hal_sd_spi_handle = NULL;
 
 static inline void sd_spi_select_card(void) {
     furi_hal_gpio_write(furi_hal_sd_spi_handle->cs, false);
diff --git a/targets/f7/furi_hal/furi_hal_spi.c b/targets/f7/furi_hal/furi_hal_spi.c
index 2a7cb7c25..9997d278d 100644
--- a/targets/f7/furi_hal/furi_hal_spi.c
+++ b/targets/f7/furi_hal/furi_hal_spi.c
@@ -38,17 +38,17 @@ void furi_hal_spi_bus_deinit(FuriHalSpiBus* bus) {
     bus->callback(bus, FuriHalSpiBusEventDeinit);
 }
 
-void furi_hal_spi_bus_handle_init(FuriHalSpiBusHandle* handle) {
+void furi_hal_spi_bus_handle_init(const FuriHalSpiBusHandle* handle) {
     furi_check(handle);
     handle->callback(handle, FuriHalSpiBusHandleEventInit);
 }
 
-void furi_hal_spi_bus_handle_deinit(FuriHalSpiBusHandle* handle) {
+void furi_hal_spi_bus_handle_deinit(const FuriHalSpiBusHandle* handle) {
     furi_check(handle);
     handle->callback(handle, FuriHalSpiBusHandleEventDeinit);
 }
 
-void furi_hal_spi_acquire(FuriHalSpiBusHandle* handle) {
+void furi_hal_spi_acquire(const FuriHalSpiBusHandle* handle) {
     furi_check(handle);
 
     furi_hal_power_insomnia_enter();
@@ -62,7 +62,7 @@ void furi_hal_spi_acquire(FuriHalSpiBusHandle* handle) {
     handle->callback(handle, FuriHalSpiBusHandleEventActivate);
 }
 
-void furi_hal_spi_release(FuriHalSpiBusHandle* handle) {
+void furi_hal_spi_release(const FuriHalSpiBusHandle* handle) {
     furi_check(handle);
     furi_check(handle->bus->current_handle == handle);
 
@@ -77,7 +77,7 @@ void furi_hal_spi_release(FuriHalSpiBusHandle* handle) {
     furi_hal_power_insomnia_exit();
 }
 
-static void furi_hal_spi_bus_end_txrx(FuriHalSpiBusHandle* handle, uint32_t timeout) {
+static void furi_hal_spi_bus_end_txrx(const FuriHalSpiBusHandle* handle, uint32_t timeout) {
     UNUSED(timeout); // FIXME
     while(LL_SPI_GetTxFIFOLevel(handle->bus->spi) != LL_SPI_TX_FIFO_EMPTY)
         ;
@@ -89,7 +89,7 @@ static void furi_hal_spi_bus_end_txrx(FuriHalSpiBusHandle* handle, uint32_t time
 }
 
 bool furi_hal_spi_bus_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* buffer,
     size_t size,
     uint32_t timeout) {
@@ -102,7 +102,7 @@ bool furi_hal_spi_bus_rx(
 }
 
 bool furi_hal_spi_bus_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* buffer,
     size_t size,
     uint32_t timeout) {
@@ -128,7 +128,7 @@ bool furi_hal_spi_bus_tx(
 }
 
 bool furi_hal_spi_bus_trx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_buffer,
     uint8_t* rx_buffer,
     size_t size,
@@ -192,7 +192,7 @@ static void spi_dma_isr(void* context) {
 }
 
 bool furi_hal_spi_bus_trx_dma(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* tx_buffer,
     uint8_t* rx_buffer,
     size_t size,
diff --git a/targets/f7/furi_hal/furi_hal_spi_config.c b/targets/f7/furi_hal/furi_hal_spi_config.c
index 8a694961a..ece0c05f7 100644
--- a/targets/f7/furi_hal/furi_hal_spi_config.c
+++ b/targets/f7/furi_hal/furi_hal_spi_config.c
@@ -147,7 +147,7 @@ FuriHalSpiBus furi_hal_spi_bus_d = {
 /* SPI Bus Handles */
 
 inline static void furi_hal_spi_bus_r_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -193,7 +193,7 @@ inline static void furi_hal_spi_bus_r_handle_event_callback(
 }
 
 inline static void furi_hal_spi_bus_external_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -239,7 +239,7 @@ inline static void furi_hal_spi_bus_external_handle_event_callback(
 }
 
 inline static void furi_hal_spi_bus_nfc_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -305,12 +305,12 @@ inline static void furi_hal_spi_bus_nfc_handle_event_callback(
 }
 
 static void furi_hal_spi_bus_handle_subghz_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_r_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_8m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz = {
     .bus = &furi_hal_spi_bus_r,
     .callback = furi_hal_spi_bus_handle_subghz_event_callback,
     .miso = &gpio_spi_r_miso,
@@ -320,12 +320,12 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz = {
 };
 
 static void furi_hal_spi_bus_handle_nfc_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_nfc_handle_event_callback(handle, event, &furi_hal_spi_preset_2edge_low_8m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc = {
     .bus = &furi_hal_spi_bus_r,
     .callback = furi_hal_spi_bus_handle_nfc_event_callback,
     .miso = &gpio_spi_r_miso,
@@ -335,13 +335,13 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc = {
 };
 
 static void furi_hal_spi_bus_handle_external_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_external_handle_event_callback(
         handle, event, &furi_hal_spi_preset_1edge_low_2m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
     .bus = &furi_hal_spi_bus_r,
     .callback = furi_hal_spi_bus_handle_external_event_callback,
     .miso = &gpio_ext_pa6,
@@ -351,7 +351,7 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_external = {
 };
 
 inline static void furi_hal_spi_bus_d_handle_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event,
     const LL_SPI_InitTypeDef* preset) {
     if(event == FuriHalSpiBusHandleEventInit) {
@@ -392,12 +392,12 @@ inline static void furi_hal_spi_bus_d_handle_event_callback(
 }
 
 static void furi_hal_spi_bus_handle_display_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_4m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_display_event_callback,
     .miso = &gpio_spi_d_miso,
@@ -407,12 +407,12 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_display = {
 };
 
 static void furi_hal_spi_bus_handle_sd_fast_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_16m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_sd_fast_event_callback,
     .miso = &gpio_spi_d_miso,
@@ -422,12 +422,12 @@ FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast = {
 };
 
 static void furi_hal_spi_bus_handle_sd_slow_event_callback(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event) {
     furi_hal_spi_bus_d_handle_event_callback(handle, event, &furi_hal_spi_preset_1edge_low_2m);
 }
 
-FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow = {
+const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow = {
     .bus = &furi_hal_spi_bus_d,
     .callback = furi_hal_spi_bus_handle_sd_slow_event_callback,
     .miso = &gpio_spi_d_miso,
diff --git a/targets/f7/furi_hal/furi_hal_spi_config.h b/targets/f7/furi_hal/furi_hal_spi_config.h
index eab633a19..e90cd7061 100644
--- a/targets/f7/furi_hal/furi_hal_spi_config.h
+++ b/targets/f7/furi_hal/furi_hal_spi_config.h
@@ -28,10 +28,10 @@ extern FuriHalSpiBus furi_hal_spi_bus_r;
 extern FuriHalSpiBus furi_hal_spi_bus_d;
 
 /** CC1101 on `furi_hal_spi_bus_r` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_subghz;
 
 /** ST25R3916 on `furi_hal_spi_bus_r` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc;
 
 /** External on `furi_hal_spi_bus_r`
  * Preset: `furi_hal_spi_preset_1edge_low_2m`
@@ -45,16 +45,16 @@ extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_nfc;
  * Bus pins are floating on inactive state, CS high after initialization
  * 
  */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_external;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_external;
 
 /** ST7567(Display) on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_display;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_display;
 
 /** SdCard in fast mode on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_fast;
 
 /** SdCard in slow mode on `furi_hal_spi_bus_d` */
-extern FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow;
+extern const FuriHalSpiBusHandle furi_hal_spi_bus_handle_sd_slow;
 
 #ifdef __cplusplus
 }
diff --git a/targets/f7/furi_hal/furi_hal_spi_types.h b/targets/f7/furi_hal/furi_hal_spi_types.h
index ecc18d50d..9bf138ac0 100644
--- a/targets/f7/furi_hal/furi_hal_spi_types.h
+++ b/targets/f7/furi_hal/furi_hal_spi_types.h
@@ -31,7 +31,7 @@ typedef void (*FuriHalSpiBusEventCallback)(FuriHalSpiBus* bus, FuriHalSpiBusEven
 struct FuriHalSpiBus {
     SPI_TypeDef* spi;
     FuriHalSpiBusEventCallback callback;
-    FuriHalSpiBusHandle* current_handle;
+    const FuriHalSpiBusHandle* current_handle;
 };
 
 /** FuriHal spi handle states */
@@ -44,7 +44,7 @@ typedef enum {
 
 /** FuriHal spi handle event callback */
 typedef void (*FuriHalSpiBusHandleEventCallback)(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     FuriHalSpiBusHandleEvent event);
 
 /** FuriHal spi handle */
diff --git a/targets/furi_hal_include/furi_hal_i2c.h b/targets/furi_hal_include/furi_hal_i2c.h
index 7d69cd74d..fe9f0949c 100644
--- a/targets/furi_hal_include/furi_hal_i2c.h
+++ b/targets/furi_hal_include/furi_hal_i2c.h
@@ -55,14 +55,14 @@ void furi_hal_i2c_init(void);
  *
  * @param      handle  Pointer to FuriHalI2cBusHandle instance
  */
-void furi_hal_i2c_acquire(FuriHalI2cBusHandle* handle);
+void furi_hal_i2c_acquire(const FuriHalI2cBusHandle* handle);
 
 /** Release I2C bus handle
  * 
  * @param      handle  Pointer to FuriHalI2cBusHandle instance acquired in
  *                     `furi_hal_i2c_acquire`
  */
-void furi_hal_i2c_release(FuriHalI2cBusHandle* handle);
+void furi_hal_i2c_release(const FuriHalI2cBusHandle* handle);
 
 /** Perform I2C TX transfer
  *
@@ -75,7 +75,7 @@ void furi_hal_i2c_release(FuriHalI2cBusHandle* handle);
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_tx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     const uint8_t* data,
     size_t size,
@@ -96,7 +96,7 @@ bool furi_hal_i2c_tx(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_tx_ext(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint16_t address,
     bool ten_bit,
     const uint8_t* data,
@@ -116,7 +116,7 @@ bool furi_hal_i2c_tx_ext(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_rx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     uint8_t* data,
     size_t size,
@@ -136,7 +136,7 @@ bool furi_hal_i2c_rx(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_rx_ext(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint16_t address,
     bool ten_bit,
     uint8_t* data,
@@ -158,7 +158,7 @@ bool furi_hal_i2c_rx_ext(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_trx(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t address,
     const uint8_t* tx_data,
     size_t tx_size,
@@ -174,7 +174,10 @@ bool furi_hal_i2c_trx(
  *
  * @return     true if device present and is ready, false otherwise
  */
-bool furi_hal_i2c_is_device_ready(FuriHalI2cBusHandle* handle, uint8_t i2c_addr, uint32_t timeout);
+bool furi_hal_i2c_is_device_ready(
+    const FuriHalI2cBusHandle* handle,
+    uint8_t i2c_addr,
+    uint32_t timeout);
 
 /** Perform I2C device register read (8-bit)
  *
@@ -187,7 +190,7 @@ bool furi_hal_i2c_is_device_ready(FuriHalI2cBusHandle* handle, uint8_t i2c_addr,
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_read_reg_8(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint8_t* data,
@@ -204,7 +207,7 @@ bool furi_hal_i2c_read_reg_8(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_read_reg_16(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint16_t* data,
@@ -222,7 +225,7 @@ bool furi_hal_i2c_read_reg_16(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_read_mem(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t mem_addr,
     uint8_t* data,
@@ -240,7 +243,7 @@ bool furi_hal_i2c_read_mem(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_write_reg_8(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint8_t data,
@@ -257,7 +260,7 @@ bool furi_hal_i2c_write_reg_8(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_write_reg_16(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t reg_addr,
     uint16_t data,
@@ -275,7 +278,7 @@ bool furi_hal_i2c_write_reg_16(
  * @return     true on successful transfer, false otherwise
  */
 bool furi_hal_i2c_write_mem(
-    FuriHalI2cBusHandle* handle,
+    const FuriHalI2cBusHandle* handle,
     uint8_t i2c_addr,
     uint8_t mem_addr,
     const uint8_t* data,
diff --git a/targets/furi_hal_include/furi_hal_spi.h b/targets/furi_hal_include/furi_hal_spi.h
index d497dff5c..41f3abdaa 100644
--- a/targets/furi_hal_include/furi_hal_spi.h
+++ b/targets/furi_hal_include/furi_hal_spi.h
@@ -35,13 +35,13 @@ void furi_hal_spi_bus_deinit(FuriHalSpiBus* bus);
  *
  * @param      handle  pointer to FuriHalSpiBusHandle instance
  */
-void furi_hal_spi_bus_handle_init(FuriHalSpiBusHandle* handle);
+void furi_hal_spi_bus_handle_init(const FuriHalSpiBusHandle* handle);
 
 /** Deinitialize SPI Bus Handle
  *
  * @param      handle  pointer to FuriHalSpiBusHandle instance
  */
-void furi_hal_spi_bus_handle_deinit(FuriHalSpiBusHandle* handle);
+void furi_hal_spi_bus_handle_deinit(const FuriHalSpiBusHandle* handle);
 
 /** Acquire SPI bus
  *
@@ -49,7 +49,7 @@ void furi_hal_spi_bus_handle_deinit(FuriHalSpiBusHandle* handle);
  *
  * @param      handle  pointer to FuriHalSpiBusHandle instance
  */
-void furi_hal_spi_acquire(FuriHalSpiBusHandle* handle);
+void furi_hal_spi_acquire(const FuriHalSpiBusHandle* handle);
 
 /** Release SPI bus
  *
@@ -57,7 +57,7 @@ void furi_hal_spi_acquire(FuriHalSpiBusHandle* handle);
  * 
  * @param      handle  pointer to FuriHalSpiBusHandle instance
  */
-void furi_hal_spi_release(FuriHalSpiBusHandle* handle);
+void furi_hal_spi_release(const FuriHalSpiBusHandle* handle);
 
 /** SPI Receive
  *
@@ -69,7 +69,7 @@ void furi_hal_spi_release(FuriHalSpiBusHandle* handle);
  * @return     true on sucess
  */
 bool furi_hal_spi_bus_rx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* buffer,
     size_t size,
     uint32_t timeout);
@@ -84,7 +84,7 @@ bool furi_hal_spi_bus_rx(
  * @return     true on success
  */
 bool furi_hal_spi_bus_tx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* buffer,
     size_t size,
     uint32_t timeout);
@@ -100,7 +100,7 @@ bool furi_hal_spi_bus_tx(
  * @return     true on success
  */
 bool furi_hal_spi_bus_trx(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     const uint8_t* tx_buffer,
     uint8_t* rx_buffer,
     size_t size,
@@ -117,7 +117,7 @@ bool furi_hal_spi_bus_trx(
  * @return     true on success
  */
 bool furi_hal_spi_bus_trx_dma(
-    FuriHalSpiBusHandle* handle,
+    const FuriHalSpiBusHandle* handle,
     uint8_t* tx_buffer,
     uint8_t* rx_buffer,
     size_t size,