diff --git a/Core/Src/main.c b/Core/Src/main.c
index 21f8504..f8d7b02 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -109,14 +109,20 @@ int main(void)
   /* USER CODE BEGIN 2 */
   MX_USART2_UART_Init();
   /* USER CODE END 2 */
-  example11_init();
-  example11_process();
+  printf("\n\n####### start 1\n\r");
+  printf("\n\n####### start 2\n\r");
+  printf("\n\n####### start 3\n\r");
+  printf("\n\n####### start 4\n\r");
+
+  //example11_init();
+  //example11_process();
   /* Infinite loop */
   /* USER CODE BEGIN WHILE */
   while (1)
   {
     /* USER CODE END WHILE */
-	  example11();
+	  //example11();
+	  //example11_process();
     MX_LoRaWAN_Process();
     //MX_TOF_Process();
 	//  MX_TOF_Ranging_Process();
diff --git a/Core/Src/sys_app.c b/Core/Src/sys_app.c
index 88f209f..182c229 100644
--- a/Core/Src/sys_app.c
+++ b/Core/Src/sys_app.c
@@ -123,7 +123,7 @@ void SystemApp_Init(void)
   /*Initialize the Sensors */
   EnvSensors_Init();
 #if defined(L8)
-  //MX_TOF_Init();
+  MX_TOF_Init();
 #endif
 #if	defined(STS_P2)
   STS_TOF_VL53LX_PeopleCounting_Process_Init();
diff --git a/Core/Src/usart_if.c b/Core/Src/usart_if.c
index 8ac0e4a..7a9a992 100644
--- a/Core/Src/usart_if.c
+++ b/Core/Src/usart_if.c
@@ -128,7 +128,7 @@ UTIL_ADV_TRACE_Status_t vcom_DeInit(void)
   /* ##-3- Disable the NVIC for DMA ########################################### */
   /* USER CODE BEGIN 1 */
   HAL_NVIC_DisableIRQ(DMA1_Channel6_IRQn);
-
+  HAL_NVIC_DisableIRQ(DMA1_Channel7_IRQn);
   return UTIL_ADV_TRACE_OK;
   /* USER CODE END 1 */
   /* USER CODE BEGIN vcom_DeInit_2 */
diff --git a/STS/TOF/App/app_tof.c b/STS/TOF/App/app_tof.c
index 47a149f..99d554a 100644
--- a/STS/TOF/App/app_tof.c
+++ b/STS/TOF/App/app_tof.c
@@ -114,9 +114,9 @@ void MX_TOF_Init(void)
   //MX_53L1A2_SimpleRanging_Init();
   //STS_TOF_VL53LX_PeopleCounting_Process();
 #ifdef	L8
-  //MX_53L8A1_ThresholdDetection_Init();
-  //MX_53L8A1_ThresholdDetection_Process();
-  example11_init();
+  MX_53L8A1_ThresholdDetection_Init();
+  MX_53L8A1_ThresholdDetection_Process();
+  //example11_init();
 #endif
 
   /* USER CODE BEGIN TOF_Init_PostTreatment */
@@ -185,8 +185,8 @@ void MX_TOF_Process(void)
 	//sts_tof_vl53lx_peoplecount_subprocess();
 #ifdef L8
 	//MX_53L8A1_ThresholdDetection_Process();
-	//STS_TOF_L8_Process();
-	example11_process();
+	STS_TOF_L8_Process();
+	//example11_process();
 #endif
 
   /* USER CODE BEGIN TOF_Process_PostTreatment */
@@ -215,15 +215,21 @@ void STS_TOF_L8_Process(void)
 void STS_Reset_Sensor(void)
 {
 /* Sensor reset */
+	printf("\r\nSTS_reset_sensor start 1\r\n");
  HAL_GPIO_WritePin(VL53L8A1_PWR_EN_C_PORT, VL53L8A1_PWR_EN_C_PIN, GPIO_PIN_RESET);
- HAL_Delay(2);
+ printf("\r\nSTS_reset_sensor start 1.1\r\n");
+ //HAL_Delay(50);
+ printf("\r\nSTS_reset_sensor start 1.2\r\n");
  HAL_GPIO_WritePin(VL53L8A1_PWR_EN_C_PORT, VL53L8A1_PWR_EN_C_PIN, GPIO_PIN_SET);
- HAL_Delay(2);
-
+ //HAL_Delay(50);
+ printf("\r\nSTS_reset_sensor start 2\r\n");
  HAL_GPIO_WritePin(VL53L8A1_LPn_C_PORT, VL53L8A1_LPn_C_PIN, GPIO_PIN_RESET);
- HAL_Delay(2);
+ printf("\r\nSTS_reset_sensor start 2.1\r\n");
+ //HAL_Delay(50);
+ printf("\r\nSTS_reset_sensor start 2.2\r\n");
  HAL_GPIO_WritePin(VL53L8A1_LPn_C_PORT, VL53L8A1_LPn_C_PIN, GPIO_PIN_SET);
- HAL_Delay(2);
+ //HAL_Delay(50);
+ printf("\r\nSTS_reset_sensor finished \r\n");
 }
 
 /*   VL53L8A1    */
@@ -324,7 +330,7 @@ static void MX_53L8A1_ThresholdDetection_Process(void)
   printf("-------------------------------------------\n\r");
   printf("please put a target between %d and %d millimeters from the sensor\n\r",
 		  LOW_THRESHOLD, HIGH_THRESHOLD);
-#if 1
+#if 0
   //while (1)
   {
     /* interrupt mode */
@@ -905,7 +911,7 @@ int example11_init(void)
 	* example, only the I2C address is used.
 	*/
 	Dev.platform.address = VL53L8CX_DEFAULT_I2C_ADDRESS;
-
+	printf("\r\n example11_init: dev =%02x\r\n", Dev.platform.address);
 	/* (Optional) Reset sensor toggling PINs (see platform, not in API) */
 	//STS_Reset_Sensor(&(Dev.platform));
 	STS_Reset_Sensor();
@@ -920,19 +926,23 @@ int example11_init(void)
 	/*********************************/
 #if 0
 	/* (Optional) Check if there is a VL53LMZ sensor connected */
-	status = vl53lmz_is_alive(&Dev, &isAlive);
+	printf("\r\n check Alive status \r\n");
+	status = vl53l8cx_is_alive(&Dev, &isAlive);
+
 	if(!isAlive || status)
 	{
 		printf("VL53LMZ not detected at requested address\n");
-		return status;
+		//return status;
 	}
 #endif
 	/* (Mandatory) Init VL53LMZ sensor */
+	printf("\r\nstart Init \r\n");
 	status = vl53l8cx_init(&Dev);
+	printf("\r\nInit status =%d  \r\n", status);
 	if(status)
 	{
 		printf("VL53LMZ ULD Loading failed\n");
-		return status;
+		//return status;
 	} else {
 		printf("VL53L8CX ULD good\n");
 	}
@@ -944,6 +954,7 @@ int example11_init(void)
 	/*********************************/
 	/*   Program motion indicator    */
 	/*********************************/
+	printf("VL53LMZ program motion indicator\n");
 
 	/* Create motion indicator with resolution 8x8 */
 	status = vl53l8cx_motion_indicator_init(&Dev, &motion_config, VL53L8CX_RESOLUTION_8X8);