diff --git a/Core/Src/sts_lamp_bar.c b/Core/Src/sts_lamp_bar.c
index d17a762..f7aa3df 100644
--- a/Core/Src/sts_lamp_bar.c
+++ b/Core/Src/sts_lamp_bar.c
@@ -102,7 +102,7 @@ void STS_YunhornSTSEventP1_Process(void)
 
 void STS_YunhornSTSEventP2_Process(void)
 {
-	STS_Lamp_Bar_Refresh();
+	//STS_Lamp_Bar_Refresh();  //TODO XXX eliminate refresh every second.... try
 	if ((sts_work_mode >= STS_RSS_MODE) && (sts_work_mode <= STS_TOF_RSS_MODE))
 	{
 		STS_RSS_Smart_Presence_Detection();
diff --git a/LoRaWAN/App/lora_app.c b/LoRaWAN/App/lora_app.c
index 73fc2fb..1d2a569 100644
--- a/LoRaWAN/App/lora_app.c
+++ b/LoRaWAN/App/lora_app.c
@@ -146,6 +146,7 @@ typedef enum TxEventType_e
 /* USER CODE BEGIN PTD */
 #define YUNHORN_STS_RSS_WAKEUP_CHECK_TIME 		SamplingPeriodicity		//3000 ms
 #define YUNHORN_STS_SAMPLING_CHECK_TIME			SamplingPeriodicity
+#define YUNHORN_STS_HEART_BEAT_CHECK_TIME		HeartBeatPeriodicity
 /* USER CODE END PTD */
 
 /* Private define ------------------------------------------------------------*/
@@ -322,6 +323,14 @@ static void OnJoinTimerLedEvent(void *context);
 
 static void OnYunhornSTSOORSSWakeUpTimerEvent(void *context);
 
+/**
+  * @brief  Yunhorn STS Heart beat timer callback function
+  * @param  context ptr of context
+  */
+
+static void OnYunhornSTSHeartBeatTimerEvent(void *context);
+
+
 /**
   * @brief  Yunhorn STS Heart Beat Periodicity Chagne function
   * @param  duration of periodicty in ms (1/1000 sec)
@@ -568,6 +577,13 @@ void LoRaWAN_Init(void)
 		  YUNHORN_STS_RSS_WAKEUP_CHECK_TIME,
 		  UTIL_TIMER_PERIODIC, OnYunhornSTSOORSSWakeUpTimerEvent, NULL);
   UTIL_TIMER_Start(&YunhornSTSRSSWakeUpTimer);
+
+  UTIL_TIMER_Create(&YunhornSTSHeartBeatTimer,
+		  YUNHORN_STS_HEART_BEAT_CHECK_TIME,
+		  UTIL_TIMER_PERIODIC, OnYunhornSTSHeartBeatTimerEvent, NULL);
+  UTIL_TIMER_Start(&YunhornSTSHeartBeatTimer);
+
+
 #else
   UTIL_TIMER_Create(&YunhornSTSSamplingCheckTimer,
 		  YUNHORN_STS_SAMPLING_CHECK_TIME,
@@ -1274,6 +1290,22 @@ static void OnYunhornSTSOORSSWakeUpTimerEvent(void *context)
 	}
 }
 
+/**
+  * @brief  Yunhorn STS Heart beat timer callback function
+  * @param  context ptr of context
+  */
+
+static void OnYunhornSTSHeartBeatTimerEvent(void *context)
+{
+	heart_beat_timer = 1;
+
+	if (STS_LoRa_WAN_Joined != 0)
+	{
+	    	UTIL_SEQ_SetTask((1 << CFG_SEQ_Task_LoRaSendOnTxTimerOrButtonEvent), CFG_SEQ_Prio_0);
+
+	}
+}
+
 /**
   * @brief  Yunhorn STS  Sensor Live Heart Beat Periodicity/interval Change callback function
   * @param  context ptr of STS Live Heart Beat context