diff --git a/LoRaWAN/App/lora_app.c b/LoRaWAN/App/lora_app.c
index 89495b7..43dc765 100644
--- a/LoRaWAN/App/lora_app.c
+++ b/LoRaWAN/App/lora_app.c
@@ -344,6 +344,7 @@ static UTIL_TIMER_Object_t JoinLedTimer;
 /* Exported functions ---------------------------------------------------------*/
 /* USER CODE BEGIN EF */
 volatile uint8_t door_status=0, door_changed_flag=0, door_previous_status=0;
+volatile uint32_t checking_sn=0;
 /* USER CODE END EF */
 
 void LoRaWAN_Init(void)
@@ -424,7 +425,7 @@ void LoRaWAN_Init(void)
   if (EventType == TX_ON_TIMER)
   {
     /* send every time timer elapses */
-    UTIL_TIMER_Create(&TxTimer, TxPeriodicity, UTIL_TIMER_ONESHOT, OnTxTimerEvent, NULL);
+    UTIL_TIMER_Create(&TxTimer, TxPeriodicity, UTIL_TIMER_PERIODIC, OnTxTimerEvent, NULL);
     UTIL_TIMER_Start(&TxTimer);
   }
   else
@@ -447,8 +448,9 @@ void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
   {
     case  BUT1_Pin:
       /* Note: when "EventType == TX_ON_TIMER" this GPIO is not initialized */
+    	door_changed_flag = 1;
     	UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_YunhornSTSP1CheckingEvent), CFG_SEQ_Prio_0);
-    	APP_LOG(TS_OFF,VLEVEL_M,"... BUT1............. \r\n");
+
       if (EventType == TX_ON_EVENT)
       {
         UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_LoRaSendOnTxTimerOrButtonEvent), CFG_SEQ_Prio_0);
@@ -474,14 +476,15 @@ static void OnYunhornSTSP1CheckingEvent(void)
 
 
 	door_status = HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0);
-	APP_LOG(TS_OFF,VLEVEL_M,"\r\nDOOR_STATUS= %u \r\n",door_status);
+
 	if (door_status != door_previous_status)
 	{
 		door_previous_status = door_status;
 		door_changed_flag = 1;
-		UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_LoRaSendOnTxTimerOrButtonEvent), CFG_SEQ_Prio_0);
+		APP_LOG(TS_OFF,VLEVEL_M,"\r\n----- Door Status Changed-------------\r\n");
 	}
 
+	//UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_LoRaSendOnTxTimerOrButtonEvent), CFG_SEQ_Prio_0);
 }
 /* USER CODE END PrFD */
 
@@ -687,7 +690,7 @@ static void OnTxTimerEvent(void *context)
     {
     	door_changed_flag =0;
     	UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_LoRaSendOnTxTimerOrButtonEvent), CFG_SEQ_Prio_0);
-    	UTIL_TIMER_Start(&TxTimer);
+    	//UTIL_TIMER_Start(&TxTimer);
 	}
   /* USER CODE BEGIN OnTxTimerEvent_2 */