diff --git a/Core/Src/gpio.c b/Core/Src/gpio.c
index 3e14778..9fc72b8 100644
--- a/Core/Src/gpio.c
+++ b/Core/Src/gpio.c
@@ -83,8 +83,13 @@ void MX_GPIO_Init(void)
 #endif
   /*Configure GPIO pin : PtPin */
   GPIO_InitStruct.Pin = BUT2_Pin;
+#ifdef	TOF_2
+  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+#else
   GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;
   GPIO_InitStruct.Pull = GPIO_PULLUP;
+#endif
   HAL_GPIO_Init(BUT2_GPIO_Port, &GPIO_InitStruct);
 
   /*Configure GPIO pin : PtPin */
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 80a8531..bbadc1e 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -26,6 +26,7 @@
 #include "i2c.h"
 #include "dma.h"
 #include "usart.h"
+#include "usart_if.h"
 #include "sys_app.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
@@ -115,7 +116,7 @@ int main(void)
   MX_LoRaWAN_Init();
 
   /* USER CODE BEGIN 2 */
-
+  vcom_DeInit();
   //HAL_Delay(3000);
 
 
diff --git a/Core/Src/stm32_lpm_if.c b/Core/Src/stm32_lpm_if.c
index bfa47d5..6684cd4 100644
--- a/Core/Src/stm32_lpm_if.c
+++ b/Core/Src/stm32_lpm_if.c
@@ -80,15 +80,28 @@ const struct UTIL_LPM_Driver_s UTIL_PowerDriver =
 
 void PWR_EnterOffMode(void)
 {
-  /* USER CODE BEGIN EnterOffMode_1 */
+#if 0
+	LED_OFF;
+	HAL_UART_DeInit(&huart2);
+  HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);//禁用所有使用的唤醒源:PWR_WAKEUP_PIN1 connected to PA.00
+  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);//清除所有相关的唤醒标志
+  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);//启用连接到PA.00的WakeUp Pin
+  HAL_PWR_EnterSTANDBYMode();//进入待机模式
 
+  /* USER CODE BEGIN EnterOffMode_1 */
+	HAL_PWR_EnterSTANDBYMode();
   /* USER CODE END EnterOffMode_1 */
+#endif
 }
 
 void PWR_ExitOffMode(void)
 {
   /* USER CODE BEGIN ExitOffMode_1 */
-
+#if 0
+    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
+    LED_ON;
+    HAL_Delay(200);
+#endif
   /* USER CODE END ExitOffMode_1 */
 }
 
@@ -123,7 +136,7 @@ void PWR_ExitStopMode(void)
     SRAM ctrls, DMAx, DMAMux, AES, RNG, HSEM  */
 
   /* Resume not retained USARTx and DMA */
-  vcom_Resume();
+  //vcom_Resume();
   /* USER CODE BEGIN ExitStopMode_2 */
   MX_GPIO_Init();
   MX_DMA_Init();
diff --git a/Core/Src/sys_app.c b/Core/Src/sys_app.c
index 00070a6..afd0327 100644
--- a/Core/Src/sys_app.c
+++ b/Core/Src/sys_app.c
@@ -122,7 +122,7 @@ void SystemApp_Init(void)
   /*Init low power manager*/
   UTIL_LPM_Init();
   /* Disable Stand-by mode */
-  UTIL_LPM_SetOffMode((1 << CFG_LPM_APPLI_Id), UTIL_LPM_ENABLE);
+  UTIL_LPM_SetOffMode((1 << CFG_LPM_APPLI_Id), UTIL_LPM_DISABLE);
 
 #if defined (LOW_POWER_DISABLE) && (LOW_POWER_DISABLE == 1)
   /* Disable Stop Mode */
diff --git a/Core/Src/usart.c b/Core/Src/usart.c
index f0e4467..f1dcfe9 100644
--- a/Core/Src/usart.c
+++ b/Core/Src/usart.c
@@ -104,13 +104,21 @@ void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
     PA3     ------> USART2_RX
     PA2     ------> USART2_TX
     */
-    GPIO_InitStruct.Pin = USARTx_RX_Pin|USARTx_TX_Pin;
+    GPIO_InitStruct.Pin = USARTx_TX_Pin;
     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
     GPIO_InitStruct.Pull = GPIO_NOPULL;
     GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
     GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 
+    GPIO_InitStruct.Pin = USARTx_RX_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    //GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    //GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+
     /* USART2 DMA Init */
     /* USART2_TX Init */
     hdma_usart2_tx.Instance = DMA1_Channel7;
diff --git a/LoRaWAN/App/lora_app.c b/LoRaWAN/App/lora_app.c
index 863239b..b3416cd 100644
--- a/LoRaWAN/App/lora_app.c
+++ b/LoRaWAN/App/lora_app.c
@@ -68,7 +68,7 @@ volatile sts_cfg_nvm_t sts_cfg_nvm = {
 		sts_mtmcode2,
 		sts_version,
 		sts_hardware_ver,
-		0x05,			//Regular TxPeriodicity interval
+		0x01,			//Regular TxPeriodicity interval
 		'M', 			//unit of Regular TxPeriodicity interval
 		0x3C,			//Heart-beat interval or Sampling interval
 		'M', 			//unit of Heart-beat interval or Sampling interval