diff --git a/applications/main/subghz/helpers/subghz_txrx_create_protocol_key.c b/applications/main/subghz/helpers/subghz_txrx_create_protocol_key.c
index 0413173e6..bafaef5ee 100644
--- a/applications/main/subghz/helpers/subghz_txrx_create_protocol_key.c
+++ b/applications/main/subghz/helpers/subghz_txrx_create_protocol_key.c
@@ -80,6 +80,14 @@ SubGhzProtocolStatus subghz_txrx_gen_data_protocol_and_te(
             FURI_LOG_E(TAG, "Unable to update Te");
         }
     }
+    if(ret == SubGhzProtocolStatusOk) {
+        uint32_t guard_time = 30;
+        if(!flipper_format_update_uint32(
+               instance->fff_data, "Guard_time", (uint32_t*)&guard_time, 1)) {
+            ret = SubGhzProtocolStatusErrorParserOthers;
+            FURI_LOG_E(TAG, "Unable to update Guard_time");
+        }
+    }
     return ret;
 }
 
diff --git a/lib/subghz/protocols/princeton.c b/lib/subghz/protocols/princeton.c
index aa15b8b41..60b394e78 100644
--- a/lib/subghz/protocols/princeton.c
+++ b/lib/subghz/protocols/princeton.c
@@ -13,6 +13,7 @@
  */
 
 #define TAG "SubGhzProtocolPrinceton"
+#define PRINCETON_GUARD_TIME_DEFALUT 30 //GUARD_TIME = PRINCETON_GUARD_TIME_DEFALUT * TE
 
 static const SubGhzBlockConst subghz_protocol_princeton_const = {
     .te_short = 390,
@@ -29,6 +30,7 @@ struct SubGhzProtocolDecoderPrinceton {
 
     uint32_t te;
     uint32_t last_data;
+    uint32_t guard_time;
 };
 
 struct SubGhzProtocolEncoderPrinceton {
@@ -38,6 +40,7 @@ struct SubGhzProtocolEncoderPrinceton {
     SubGhzBlockGeneric generic;
 
     uint32_t te;
+    uint32_t guard_time;
 };
 
 typedef enum {
@@ -135,8 +138,9 @@ static bool
 
     //Send Stop bit
     instance->encoder.upload[index++] = level_duration_make(true, (uint32_t)instance->te);
-    //Send PT_GUARD
-    instance->encoder.upload[index++] = level_duration_make(false, (uint32_t)instance->te * 30);
+    //Send PT_GUARD_TIME
+    instance->encoder.upload[index++] =
+        level_duration_make(false, (uint32_t)instance->te * instance->guard_time);
 
     return true;
 }
@@ -165,6 +169,11 @@ SubGhzProtocolStatus
             break;
         }
         //optional parameter parameter
+        if(!flipper_format_read_uint32(
+               flipper_format, "Guard_time", (uint32_t*)&instance->guard_time, 1)) {
+            instance->guard_time = PRINCETON_GUARD_TIME_DEFALUT;
+        }
+
         flipper_format_read_uint32(
             flipper_format, "Repeat", (uint32_t*)&instance->encoder.repeat, 1);
 
@@ -235,6 +244,7 @@ void subghz_protocol_decoder_princeton_feed(void* context, bool level, uint32_t
             instance->decoder.decode_data = 0;
             instance->decoder.decode_count_bit = 0;
             instance->te = 0;
+            instance->guard_time = PRINCETON_GUARD_TIME_DEFALUT;
         }
         break;
     case PrincetonDecoderStepSaveDuration:
@@ -257,6 +267,7 @@ void subghz_protocol_decoder_princeton_feed(void* context, bool level, uint32_t
 
                         instance->generic.data = instance->decoder.decode_data;
                         instance->generic.data_count_bit = instance->decoder.decode_count_bit;
+                        instance->guard_time = round((float)duration / instance->te);
 
                         if(instance->base.callback)
                             instance->base.callback(&instance->base, instance->base.context);
@@ -323,6 +334,12 @@ SubGhzProtocolStatus subghz_protocol_decoder_princeton_serialize(
         FURI_LOG_E(TAG, "Unable to add TE");
         ret = SubGhzProtocolStatusErrorParserTe;
     }
+    if((ret == SubGhzProtocolStatusOk) &&
+       !flipper_format_write_uint32(flipper_format, "Guard_time", &instance->guard_time, 1)) {
+        FURI_LOG_E(TAG, "Unable to add Guard_time");
+        ret = SubGhzProtocolStatusErrorParserOthers;
+    }
+
     return ret;
 }
 
@@ -349,6 +366,10 @@ SubGhzProtocolStatus
             ret = SubGhzProtocolStatusErrorParserTe;
             break;
         }
+        if(!flipper_format_read_uint32(
+               flipper_format, "Guard_time", (uint32_t*)&instance->guard_time, 1)) {
+            instance->guard_time = PRINCETON_GUARD_TIME_DEFALUT;
+        }
     } while(false);
 
     return ret;