diff --git a/lib/lfrfid/protocols/protocol_electra.c b/lib/lfrfid/protocols/protocol_electra.c
index 50d82c8f1..d107cd6e3 100644
--- a/lib/lfrfid/protocols/protocol_electra.c
+++ b/lib/lfrfid/protocols/protocol_electra.c
@@ -406,8 +406,7 @@ bool protocol_electra_write_data(ProtocolElectra* protocol, void* data) {
         request->t5577.block[4] = protocol->encoded_epilogue & 0xFFFFFFFF;
         request->t5577.blocks_to_write = 5;
         result = true;
-    }
-    if(request->write_type == LFRFIDWriteTypeEM4305) {
+    } else if(request->write_type == LFRFIDWriteTypeEM4305) {
         request->em4305.word[4] =
             (EM4x05_MODULATION_MANCHESTER | EM4x05_SET_BITRATE(64) | (8 << EM4x05_MAXBLOCK_SHIFT));
         uint64_t encoded_data_reversed = 0;
diff --git a/lib/lfrfid/protocols/protocol_fdx_b.c b/lib/lfrfid/protocols/protocol_fdx_b.c
index 3de2b661b..df37a7e0f 100644
--- a/lib/lfrfid/protocols/protocol_fdx_b.c
+++ b/lib/lfrfid/protocols/protocol_fdx_b.c
@@ -369,6 +369,21 @@ bool protocol_fdx_b_write_data(ProtocolFDXB* protocol, void* data) {
         request->t5577.block[4] = bit_lib_get_bits_32(protocol->encoded_data, 96, 32);
         request->t5577.blocks_to_write = 5;
         result = true;
+    } else if(request->write_type == LFRFIDWriteTypeEM4305) {
+        request->em4305.word[4] =
+            (EM4x05_MODULATION_BIPHASE | EM4x05_SET_BITRATE(32) | (8 << EM4x05_MAXBLOCK_SHIFT));
+        uint32_t encoded_data_reversed[4] = {0};
+        for(uint8_t i = 0; i < 128; i++) {
+            encoded_data_reversed[i / 32] =
+                (encoded_data_reversed[i / 32] << 1) |
+                (bit_lib_get_bit(protocol->encoded_data, (127 - i)) & 1);
+        }
+        request->em4305.word[5] = encoded_data_reversed[3];
+        request->em4305.word[6] = encoded_data_reversed[2];
+        request->em4305.word[7] = encoded_data_reversed[1];
+        request->em4305.word[8] = encoded_data_reversed[0];
+        request->em4305.mask = 0x1F0;
+        result = true;
     }
     return result;
 }
diff --git a/lib/lfrfid/protocols/protocol_gproxii.c b/lib/lfrfid/protocols/protocol_gproxii.c
index 341d092e9..18d20ee75 100644
--- a/lib/lfrfid/protocols/protocol_gproxii.c
+++ b/lib/lfrfid/protocols/protocol_gproxii.c
@@ -287,6 +287,20 @@ bool protocol_gproxii_write_data(ProtocolGProxII* protocol, void* data) {
         request->t5577.block[3] = bit_lib_get_bits_32(protocol->data, 64, 32);
         request->t5577.blocks_to_write = 4;
         result = true;
+    } else if(request->write_type == LFRFIDWriteTypeEM4305) {
+        request->em4305.word[4] =
+            (EM4x05_MODULATION_BIPHASE | EM4x05_SET_BITRATE(64) | (7 << EM4x05_MAXBLOCK_SHIFT));
+        uint32_t encoded_data_reversed[3] = {0};
+        for(uint8_t i = 0; i < 96; i++) {
+            encoded_data_reversed[i / 32] = (encoded_data_reversed[i / 32] << 1) |
+                                            (bit_lib_get_bit(protocol->data, (95 - i)) & 1);
+            encoded_data_reversed[i / 32] ^= 1; // Invert to make DIPHASE/BIPHASE.
+        }
+        request->em4305.word[5] = encoded_data_reversed[2];
+        request->em4305.word[6] = encoded_data_reversed[1];
+        request->em4305.word[7] = encoded_data_reversed[0];
+        request->em4305.mask = 0xF0;
+        result = true;
     }
     return result;
 }
diff --git a/lib/lfrfid/protocols/protocol_jablotron.c b/lib/lfrfid/protocols/protocol_jablotron.c
index 643bb1be6..8e3628a3b 100644
--- a/lib/lfrfid/protocols/protocol_jablotron.c
+++ b/lib/lfrfid/protocols/protocol_jablotron.c
@@ -182,6 +182,19 @@ bool protocol_jablotron_write_data(ProtocolJablotron* protocol, void* data) {
         request->t5577.block[2] = bit_lib_get_bits_32(protocol->encoded_data, 32, 32);
         request->t5577.blocks_to_write = 3;
         result = true;
+    } else if(request->write_type == LFRFIDWriteTypeEM4305) {
+        request->em4305.word[4] =
+            (EM4x05_MODULATION_BIPHASE | EM4x05_SET_BITRATE(64) | (6 << EM4x05_MAXBLOCK_SHIFT));
+        uint32_t encoded_data_reversed[2] = {0};
+        for(uint8_t i = 0; i < 64; i++) {
+            encoded_data_reversed[i / 32] =
+                (encoded_data_reversed[i / 32] << 1) |
+                (bit_lib_get_bit(protocol->encoded_data, (63 - i)) & 1);
+        }
+        request->em4305.word[5] = encoded_data_reversed[1];
+        request->em4305.word[6] = encoded_data_reversed[0];
+        request->em4305.mask = 0x70;
+        result = true;
     }
     return result;
 }
diff --git a/lib/lfrfid/protocols/protocol_securakey.c b/lib/lfrfid/protocols/protocol_securakey.c
index 947b68e72..9c9fb8ab1 100644
--- a/lib/lfrfid/protocols/protocol_securakey.c
+++ b/lib/lfrfid/protocols/protocol_securakey.c
@@ -328,6 +328,20 @@ bool protocol_securakey_write_data(ProtocolSecurakey* protocol, void* data) {
             request->t5577.block[2] = bit_lib_get_bits_32(protocol->RKKTH_encoded_data, 32, 32);
             request->t5577.blocks_to_write = 3;
             result = true;
+        } else if(request->write_type == LFRFIDWriteTypeEM4305) {
+            request->em4305.word[4] =
+                (EM4x05_MODULATION_MANCHESTER | EM4x05_SET_BITRATE(40) | // requires 330pF card
+                 (6 << EM4x05_MAXBLOCK_SHIFT));
+            uint32_t encoded_data_reversed[2] = {0};
+            for(uint8_t i = 0; i < 64; i++) {
+                encoded_data_reversed[i / 32] =
+                    (encoded_data_reversed[i / 32] << 1) |
+                    (bit_lib_get_bit(protocol->RKKTH_encoded_data, (63 - i)) & 1);
+            }
+            request->em4305.word[5] = encoded_data_reversed[1];
+            request->em4305.word[6] = encoded_data_reversed[0];
+            request->em4305.mask = 0x70;
+            result = true;
         }
     } else {
         if(request->write_type == LFRFIDWriteTypeT5577) {
@@ -340,6 +354,21 @@ bool protocol_securakey_write_data(ProtocolSecurakey* protocol, void* data) {
             request->t5577.block[3] = bit_lib_get_bits_32(protocol->RKKT_encoded_data, 64, 32);
             request->t5577.blocks_to_write = 4;
             result = true;
+        } else if(request->write_type == LFRFIDWriteTypeEM4305) {
+            request->em4305.word[4] =
+                (EM4x05_MODULATION_MANCHESTER | EM4x05_SET_BITRATE(40) | // requires 330pF card
+                 (7 << EM4x05_MAXBLOCK_SHIFT));
+            uint32_t encoded_data_reversed[3] = {0};
+            for(uint8_t i = 0; i < 96; i++) {
+                encoded_data_reversed[i / 32] =
+                    (encoded_data_reversed[i / 32] << 1) |
+                    (bit_lib_get_bit(protocol->RKKT_encoded_data, (95 - i)) & 1);
+            }
+            request->em4305.word[5] = encoded_data_reversed[2];
+            request->em4305.word[6] = encoded_data_reversed[1];
+            request->em4305.word[7] = encoded_data_reversed[0];
+            request->em4305.mask = 0xF0;
+            result = true;
         }
     }
     return result;