diff --git a/LoRaWAN/App/lora_app.c b/LoRaWAN/App/lora_app.c
index 439e1b5..ff9e86b 100644
--- a/LoRaWAN/App/lora_app.c
+++ b/LoRaWAN/App/lora_app.c
@@ -471,22 +471,22 @@ void LoRaWAN_Init(void)
 
   /* Init Info table used by LmHandler*/
   LoraInfo_Init();
-  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  1\n");
+
   /* Init the Lora Stack*/
   LmHandlerInit(&LmHandlerCallbacks, APP_VERSION);
 
   LmHandlerConfigure(&LmHandlerParams);
-  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  2\n");
+
   /* USER CODE BEGIN LoRaWAN_Init_2 */
   UTIL_TIMER_Start(&JoinLedTimer);
 
   /* USER CODE END LoRaWAN_Init_2 */
-  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  3\n");
+
   LmHandlerJoin(ActivationType, ForceRejoin);
-  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  3 FORCE JOIN\n");
+
   if (EventType == TX_ON_TIMER)
   {
-	  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  4\n");
+
     /* send every time timer elapses */
     UTIL_TIMER_Create(&TxTimer, TxPeriodicity, UTIL_TIMER_ONESHOT, OnTxTimerEvent, NULL);
     UTIL_TIMER_Start(&TxTimer);
@@ -494,7 +494,7 @@ void LoRaWAN_Init(void)
   else
   {
     /* USER CODE BEGIN LoRaWAN_Init_3 */
-	  APP_LOG(TS_OFF, VLEVEL_M, "\n   start  5\n");
+
     /* USER CODE END LoRaWAN_Init_3 */
   }
 
@@ -516,7 +516,7 @@ void LoRaWAN_Init(void)
   UTIL_TIMER_Create(&YunhornSTSWakeUpScanTimer, STS_TOFScanPeriod_msec, UTIL_TIMER_PERIODIC, (void*)OnYunhornSTSWakeUpScanTimerEvent, NULL);
   UTIL_TIMER_Start(&YunhornSTSWakeUpScanTimer);
 
-  UTIL_TIMER_Create(&YunhornSTSHeartBeatTimer, STS_HeartBeatTimerPeriod_sec, UTIL_TIMER_PERIODIC, OnYunhornSTSHeartBeatTimerEvent, NULL);
+  UTIL_TIMER_Create(&YunhornSTSHeartBeatTimer, 1000*STS_HeartBeatTimerPeriod_sec, UTIL_TIMER_PERIODIC, OnYunhornSTSHeartBeatTimerEvent, NULL);
   UTIL_TIMER_Start(&YunhornSTSHeartBeatTimer);
 
   /* USER CODE END LoRaWAN_Init_Last */
@@ -1217,6 +1217,26 @@ static void OnYunhornSTSOORSSWakeUpTimerEvent(void *context)
 
 static void OnYunhornSTSHeartBeatTimerEvent(void *context)
 {
+//	  UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_YunhornSTSEventRFAC), CFG_SEQ_Prio_0);
+
+	uint8_t appDataPort, appBufferSize, appDataBuffer[32];
+	appDataPort = YUNHORN_STS_P2_LORA_APP_HTBT_PORT;
+	appBufferSize = 2;
+	appDataBuffer[0]=0x80;
+	appDataBuffer[1]=0x63;  //TODO XXX change to battery level %
+
+    STS_SENSOR_Upload_Message(appDataPort, appBufferSize, (uint8_t*)appDataBuffer);
+
+	if ((sts_ac_code[0]==0x0) && (sts_ac_code[19]==0x0))		/* simple validation of non-empty ac code */
+	{
+	  		/* RFAC  Challenge */
+	  		if (rfac_timer < (STS_BURN_IN_RFAC+3)) {
+	  			rfac_timer ++;
+	  		}
+	  		//STS_YunhornSTSEventRFAC_Process();
+	   		UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_YunhornSTSEventRFAC), CFG_SEQ_Prio_0);
+	}
+	UTIL_TIMER_Start(&YunhornSTSHeartBeatTimer);
 
 }
 
diff --git a/STS/Core/Src/yunhorn_sts_process.c b/STS/Core/Src/yunhorn_sts_process.c
index 8c37e44..24a3182 100644
--- a/STS/Core/Src/yunhorn_sts_process.c
+++ b/STS/Core/Src/yunhorn_sts_process.c
@@ -105,7 +105,7 @@ volatile uint8_t sts_work_mode=4;
 volatile uint32_t rfac_timer=0;
 volatile uint16_t sts_sensor_install_height=3000;
 volatile uint8_t sensor_data_ready=0;
-volatile uint32_t STS_TOFScanPeriod_msec=50, STS_TxPeriod_sec=10, STS_HeartBeatTimerPeriod_sec=120;
+volatile uint32_t STS_TOFScanPeriod_msec=50, STS_TxPeriod_sec=10, STS_HeartBeatTimerPeriod_sec=60;
 static uint8_t outbuf[128]={0x0};
 extern volatile hmac_result_t hmac_result;
 extern uint16_t sensor_id;
@@ -1706,6 +1706,7 @@ void OnYunhornSTSOORSSWakeUpTimerEvent(void *context)
   */
 void OnYunhornSTSHeartBeatTimerEvent(void *context)
 {
+#if 0
 	uint8_t appDataPort, appBufferSize, appDataBuffer[32];
 	appDataPort = YUNHORN_STS_P2_LORA_APP_HTBT_PORT;
 	appBufferSize = 2;
@@ -1724,6 +1725,7 @@ void OnYunhornSTSHeartBeatTimerEvent(void *context)
 	   		UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_YunhornSTSEventRFAC), CFG_SEQ_Prio_0);
 	}
 	UTIL_TIMER_Start(&YunhornSTSHeartBeatTimer);
+#endif
 }
 
 /**