diff --git a/project/example/ble/ble_peripheral/app/src/arch_main.c b/project/example/ble/ble_peripheral/app/src/arch_main.c
index 501a79f..092791c 100644
--- a/project/example/ble/ble_peripheral/app/src/arch_main.c
+++ b/project/example/ble/ble_peripheral/app/src/arch_main.c
@@ -274,8 +274,7 @@ void board_init()
 #if (POWER_ON)
     power_on_check();
 #endif // (POWER_ON)
-    LOGI("sdk version: %s build time: %s %s\n", TOSTRING(SDK_VERSION), __DATE__,
-         __TIME__);
+    LOGI("sdk version: %s\n", TOSTRING(SDK_VERSION));
     // stack_tag();
     rom_env_host_init();
 #if (SLEEP_ENABLE)
@@ -529,4 +528,3 @@ int main(void)
 
 /// @} DRIVERS
 
-
diff --git a/project/example/ble/ble_peripheral/app/src/switch_s.c b/project/example/ble/ble_peripheral/app/src/switch_s.c
index 4dad851..1a310e4 100644
--- a/project/example/ble/ble_peripheral/app/src/switch_s.c
+++ b/project/example/ble/ble_peripheral/app/src/switch_s.c
@@ -302,7 +302,7 @@ void trigger_check_process(void)
 			//printf("对码 trig1_cnt   %d\r\n",trig1_cnt);
 				if( s1_state == DB_IDLE)
 				{
-				rf433_sw_flag = 1;
+					rf433_sw_flag = 2;  // HPW421: S1/GPIO5 is the single relay L2 pairing key
 					trig1_cnt = 0;
 					trig1_wait = 0;	
 				}
diff --git a/release/online/HPW421_V1.3_XC6517_1D2E21A0.bin b/release/online/HPW421_V1.3_XC6517_1D2E21A0.bin
new file mode 100644
index 0000000..6c31a15
Binary files /dev/null and b/release/online/HPW421_V1.3_XC6517_1D2E21A0.bin differ
diff --git a/release/ota/HPW421_V1.3_XC6517_1D2E21A0_OTA.bin b/release/ota/HPW421_V1.3_XC6517_1D2E21A0_OTA.bin
new file mode 100644
index 0000000..ef6f579
Binary files /dev/null and b/release/ota/HPW421_V1.3_XC6517_1D2E21A0_OTA.bin differ
diff --git a/tools/offline_burn/40-ab-00-cd-01-01_1D2E21A0_1000000.bin b/tools/offline_burn/40-ab-00-cd-01-01_1D2E21A0_1000000.bin
new file mode 100644
index 0000000..190d943
Binary files /dev/null and b/tools/offline_burn/40-ab-00-cd-01-01_1D2E21A0_1000000.bin differ