diff --git a/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it.c b/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it.c
index 0728963b..f096877a 100644
--- a/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it.c
+++ b/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it.c
@@ -22,7 +22,7 @@
 #include "main.h"
 #include "stm32l4xx_it.h"
 #include "tos_k.h"
-#include "tos_at.h"
+//#include "tos_at.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 /* USER CODE END Includes */
@@ -258,7 +258,7 @@ void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
     extern uint8_t data;
     if (huart->Instance == USART2) {
         HAL_UART_Receive_IT(&huart2, &data, 1);
-        tos_at_uart_input_byte(data);
+        //tos_at_uart_input_byte(data);
     }
 }
 /* USER CODE END 1 */
diff --git a/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it_mqtt.c b/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it_mqtt.c
new file mode 100644
index 00000000..0728963b
--- /dev/null
+++ b/board/NUCLEO_STM32L496ZG/BSP/Src/stm32l4xx_it_mqtt.c
@@ -0,0 +1,265 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_it.c
+  * @brief   Interrupt Service Routines.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2019 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Includes ------------------------------------------------------------------*/
+#include "main.h"
+#include "stm32l4xx_it.h"
+#include "tos_k.h"
+#include "tos_at.h"
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+/* USER CODE END Includes */
+
+/* Private typedef -----------------------------------------------------------*/
+/* USER CODE BEGIN TD */
+
+/* USER CODE END TD */
+
+/* Private define ------------------------------------------------------------*/
+/* USER CODE BEGIN PD */
+
+/* USER CODE END PD */
+
+/* Private macro -------------------------------------------------------------*/
+/* USER CODE BEGIN PM */
+
+/* USER CODE END PM */
+
+/* Private variables ---------------------------------------------------------*/
+/* USER CODE BEGIN PV */
+
+/* USER CODE END PV */
+
+/* Private function prototypes -----------------------------------------------*/
+/* USER CODE BEGIN PFP */
+
+/* USER CODE END PFP */
+
+/* Private user code ---------------------------------------------------------*/
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+/* External variables --------------------------------------------------------*/
+extern UART_HandleTypeDef hlpuart1;
+extern UART_HandleTypeDef huart2;
+extern UART_HandleTypeDef huart3;
+/* USER CODE BEGIN EV */
+
+/* USER CODE END EV */
+
+/******************************************************************************/
+/*           Cortex-M4 Processor Interruption and Exception Handlers          */
+/******************************************************************************/
+/**
+  * @brief This function handles Non maskable interrupt.
+  */
+void NMI_Handler(void)
+{
+  /* USER CODE BEGIN NonMaskableInt_IRQn 0 */
+
+  /* USER CODE END NonMaskableInt_IRQn 0 */
+  /* USER CODE BEGIN NonMaskableInt_IRQn 1 */
+
+  /* USER CODE END NonMaskableInt_IRQn 1 */
+}
+
+/**
+  * @brief This function handles Hard fault interrupt.
+  */
+void HardFault_Handler(void)
+{
+  /* USER CODE BEGIN HardFault_IRQn 0 */
+
+  /* USER CODE END HardFault_IRQn 0 */
+  while (1)
+  {
+    /* USER CODE BEGIN W1_HardFault_IRQn 0 */
+    /* USER CODE END W1_HardFault_IRQn 0 */
+  }
+}
+
+/**
+  * @brief This function handles Memory management fault.
+  */
+void MemManage_Handler(void)
+{
+  /* USER CODE BEGIN MemoryManagement_IRQn 0 */
+
+  /* USER CODE END MemoryManagement_IRQn 0 */
+  while (1)
+  {
+    /* USER CODE BEGIN W1_MemoryManagement_IRQn 0 */
+    /* USER CODE END W1_MemoryManagement_IRQn 0 */
+  }
+}
+
+/**
+  * @brief This function handles Prefetch fault, memory access fault.
+  */
+void BusFault_Handler(void)
+{
+  /* USER CODE BEGIN BusFault_IRQn 0 */
+
+  /* USER CODE END BusFault_IRQn 0 */
+  while (1)
+  {
+    /* USER CODE BEGIN W1_BusFault_IRQn 0 */
+    /* USER CODE END W1_BusFault_IRQn 0 */
+  }
+}
+
+/**
+  * @brief This function handles Undefined instruction or illegal state.
+  */
+void UsageFault_Handler(void)
+{
+  /* USER CODE BEGIN UsageFault_IRQn 0 */
+
+  /* USER CODE END UsageFault_IRQn 0 */
+  while (1)
+  {
+    /* USER CODE BEGIN W1_UsageFault_IRQn 0 */
+    /* USER CODE END W1_UsageFault_IRQn 0 */
+  }
+}
+
+/**
+  * @brief This function handles System service call via SWI instruction.
+  */
+void SVC_Handler(void)
+{
+  /* USER CODE BEGIN SVCall_IRQn 0 */
+
+  /* USER CODE END SVCall_IRQn 0 */
+  /* USER CODE BEGIN SVCall_IRQn 1 */
+
+  /* USER CODE END SVCall_IRQn 1 */
+}
+
+/**
+  * @brief This function handles Debug monitor.
+  */
+void DebugMon_Handler(void)
+{
+  /* USER CODE BEGIN DebugMonitor_IRQn 0 */
+
+  /* USER CODE END DebugMonitor_IRQn 0 */
+  /* USER CODE BEGIN DebugMonitor_IRQn 1 */
+
+  /* USER CODE END DebugMonitor_IRQn 1 */
+}
+
+/**
+  * @brief This function handles Pendable request for system service.
+  */
+__weak void PendSV_Handler(void)
+{
+  /* USER CODE BEGIN PendSV_IRQn 0 */
+
+  /* USER CODE END PendSV_IRQn 0 */
+  /* USER CODE BEGIN PendSV_IRQn 1 */
+
+  /* USER CODE END PendSV_IRQn 1 */
+}
+
+/**
+  * @brief This function handles System tick timer.
+  */
+void SysTick_Handler(void)
+{
+  /* USER CODE BEGIN SysTick_IRQn 0 */
+
+  /* USER CODE END SysTick_IRQn 0 */
+  HAL_IncTick();
+  if (tos_knl_is_running())
+  {
+    tos_knl_irq_enter();
+    tos_tick_handler();
+    tos_knl_irq_leave();
+  }
+  //HAL_SYSTICK_IRQHandler();
+  /* USER CODE BEGIN SysTick_IRQn 1 */
+
+  /* USER CODE END SysTick_IRQn 1 */
+}
+
+/******************************************************************************/
+/* STM32L4xx Peripheral Interrupt Handlers                                    */
+/* Add here the Interrupt Handlers for the used peripherals.                  */
+/* For the available peripheral interrupt handler names,                      */
+/* please refer to the startup file (startup_stm32l4xx.s).                    */
+/******************************************************************************/
+
+/**
+  * @brief This function handles USART2 global interrupt.
+  */
+void USART2_IRQHandler(void)
+{
+  /* USER CODE BEGIN USART2_IRQn 0 */
+
+  /* USER CODE END USART2_IRQn 0 */
+  HAL_UART_IRQHandler(&huart2);
+  /* USER CODE BEGIN USART2_IRQn 1 */
+
+  /* USER CODE END USART2_IRQn 1 */
+}
+
+/**
+  * @brief This function handles USART3 global interrupt.
+  */
+void USART3_IRQHandler(void)
+{
+  /* USER CODE BEGIN USART3_IRQn 0 */
+
+  /* USER CODE END USART3_IRQn 0 */
+  HAL_UART_IRQHandler(&huart3);
+  /* USER CODE BEGIN USART3_IRQn 1 */
+
+  /* USER CODE END USART3_IRQn 1 */
+}
+
+/**
+  * @brief This function handles LPUART1 global interrupt.
+  */
+void LPUART1_IRQHandler(void)
+{
+  /* USER CODE BEGIN LPUART1_IRQn 0 */
+
+  /* USER CODE END LPUART1_IRQn 0 */
+    tos_knl_irq_enter();
+    HAL_UART_IRQHandler(&hlpuart1);
+    tos_knl_irq_leave();
+  /* USER CODE BEGIN LPUART1_IRQn 1 */
+
+  /* USER CODE END LPUART1_IRQn 1 */
+}
+
+/* USER CODE BEGIN 1 */
+void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
+{
+    extern uint8_t data;
+    if (huart->Instance == USART2) {
+        HAL_UART_Receive_IT(&huart2, &data, 1);
+        tos_at_uart_input_byte(data);
+    }
+}
+/* USER CODE END 1 */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvoptx b/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvoptx
index 405d34bc..a6051e4c 100644
--- a/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvoptx
+++ b/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvoptx
@@ -341,8 +341,8 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>..\..\BSP\Src\stm32l4xx_it.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l4xx_it.c</FilenameWithoutPath>
+      <PathWithFileName>..\..\BSP\Src\stm32l4xx_it_mqtt.c</PathWithFileName>
+      <FilenameWithoutPath>stm32l4xx_it_mqtt.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -1553,7 +1553,7 @@
   </Group>
 
   <Group>
-    <GroupName>mbedtls</GroupName>
+    <GroupName>mebdtls</GroupName>
     <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
diff --git a/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvprojx b/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvprojx
index 388f7706..9a1356a6 100644
--- a/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvprojx
+++ b/board/NUCLEO_STM32L496ZG/KEIL/aliyun_iotkit_csdk_mqtt/TencentOS_tiny.uvprojx
@@ -10,14 +10,14 @@
       <TargetName>TencentOS_tiny</TargetName>
       <ToolsetNumber>0x4</ToolsetNumber>
       <ToolsetName>ARM-ADS</ToolsetName>
-      <pCCUsed>5060750::V5.06 update 6 (build 750)::ARMCC</pCCUsed>
+      <pCCUsed>5060750::V5.06 update 6 (build 750)::.\ARMCC</pCCUsed>
       <uAC6>0</uAC6>
       <TargetOption>
         <TargetCommonOption>
           <Device>STM32L496ZGTx</Device>
           <Vendor>STMicroelectronics</Vendor>
-          <PackID>Keil.STM32L4xx_DFP.2.0.0</PackID>
-          <PackURL>http://www.keil.com/pack</PackURL>
+          <PackID>Keil.STM32L4xx_DFP.2.4.0</PackID>
+          <PackURL>http://www.keil.com/pack/</PackURL>
           <Cpu>IRAM(0x20000000,0x00040000) IRAM2(0x10000000,0x00010000) IROM(0x08000000,0x00100000) CPUTYPE("Cortex-M4") FPU2 CLOCK(12000000) ELITTLE</Cpu>
           <FlashUtilSpec></FlashUtilSpec>
           <StartupFile></StartupFile>
@@ -185,6 +185,7 @@
             <uocXRam>0</uocXRam>
             <RvdsVP>2</RvdsVP>
             <RvdsMve>0</RvdsMve>
+            <RvdsCdeCp>0</RvdsCdeCp>
             <hadIRAM2>1</hadIRAM2>
             <hadIROM2>0</hadIROM2>
             <StupSel>8</StupSel>
@@ -338,7 +339,7 @@
               <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER,STM32L496xx,PLATFORM_HAS_STDINT,INFRA_COMPAT,INFRA_LOG,INFRA_TIMER,INFRA_REPORT,INFRA_NET,INFRA_STRING,INFRA_SHA256,MBEDTLS_CONFIG_FILE=&lt;qcloud/tls_psk_config.h&gt;</Define>
               <Undefine></Undefine>
-              <IncludePath>..\..\BSP\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Legacy;..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\kernel\core\include;..\..\TOS-CONFIG;..\..\..\..\platform\arch\arm\cortex-m4\keil;..\..\..\..\kernel\pm\include;..\..\..\..\osal\cmsis_os;..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\BSP\Hardware\DHT11;..\..\BSP\Hardware\BH1750;..\..\BSP\Hardware\OLED;..\..\..\..\examples\helloworld;..\..\..\..\net\at\include;..\..\..\..\kernel\hal\include;..\..\..\..\net\sal_module_wrapper;..\..\..\..\examples\mqtt;..\..\..\..\devices\bc35_28_95;..\..\..\..\devices\esp8266;..\..\..\..\devices\m26;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\infra;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\dev_sign;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\mqtt;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\wrappers;..\..\..\..\components\security\mbedtls\3rdparty\include;..\..\..\..\components\security\mbedtls\wrapper\include</IncludePath>
+              <IncludePath>..\..\BSP\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Legacy;..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\kernel\core\include;..\..\TOS_CONFIG;..\..\..\..\platform\arch\arm\cortex-m4\keil;..\..\..\..\kernel\pm\include;..\..\..\..\osal\cmsis_os;..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\BSP\Hardware\DHT11;..\..\BSP\Hardware\BH1750;..\..\BSP\Hardware\OLED;..\..\..\..\examples\helloworld;..\..\..\..\net\at\include;..\..\..\..\kernel\hal\include;..\..\..\..\net\sal_module_wrapper;..\..\..\..\examples\mqtt;..\..\..\..\devices\bc35_28_95;..\..\..\..\devices\esp8266;..\..\..\..\devices\m26;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\infra;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\dev_sign;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\src\mqtt;..\..\..\..\components\connectivity\iotkit-embedded-3.0.1\3rdparty\wrappers;..\..\..\..\components\security\mbedtls\3rdparty\include;..\..\..\..\components\security\mbedtls\wrapper\include</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
@@ -351,7 +352,7 @@
             <NoWarn>0</NoWarn>
             <uSurpInc>0</uSurpInc>
             <useXO>0</useXO>
-            <uClangAs>0</uClangAs>
+            <ClangAsOpt>4</ClangAsOpt>
             <VariousControls>
               <MiscControls></MiscControls>
               <Define></Define>
@@ -418,9 +419,9 @@
               <FilePath>..\..\BSP\Src\usart.c</FilePath>
             </File>
             <File>
-              <FileName>stm32l4xx_it.c</FileName>
+              <FileName>stm32l4xx_it_mqtt.c</FileName>
               <FileType>1</FileType>
-              <FilePath>..\..\BSP\Src\stm32l4xx_it.c</FilePath>
+              <FilePath>..\..\BSP\Src\stm32l4xx_it_mqtt.c</FilePath>
             </File>
           </Files>
         </Group>
@@ -950,76 +951,7 @@
           </Files>
         </Group>
         <Group>
-          <GroupName>mbedtls</GroupName>
-          <GroupOption>
-            <CommonProperty>
-              <UseCPPCompiler>0</UseCPPCompiler>
-              <RVCTCodeConst>0</RVCTCodeConst>
-              <RVCTZI>0</RVCTZI>
-              <RVCTOtherData>0</RVCTOtherData>
-              <ModuleSelection>0</ModuleSelection>
-              <IncludeInBuild>0</IncludeInBuild>
-              <AlwaysBuild>2</AlwaysBuild>
-              <GenerateAssemblyFile>2</GenerateAssemblyFile>
-              <AssembleAssemblyFile>2</AssembleAssemblyFile>
-              <PublicsOnly>2</PublicsOnly>
-              <StopOnExitCode>11</StopOnExitCode>
-              <CustomArgument></CustomArgument>
-              <IncludeLibraryModules></IncludeLibraryModules>
-              <ComprImg>1</ComprImg>
-            </CommonProperty>
-            <GroupArmAds>
-              <Cads>
-                <interw>2</interw>
-                <Optim>0</Optim>
-                <oTime>2</oTime>
-                <SplitLS>2</SplitLS>
-                <OneElfS>2</OneElfS>
-                <Strict>2</Strict>
-                <EnumInt>2</EnumInt>
-                <PlainCh>2</PlainCh>
-                <Ropi>2</Ropi>
-                <Rwpi>2</Rwpi>
-                <wLevel>0</wLevel>
-                <uThumb>2</uThumb>
-                <uSurpInc>2</uSurpInc>
-                <uC99>2</uC99>
-                <uGnu>2</uGnu>
-                <useXO>2</useXO>
-                <v6Lang>0</v6Lang>
-                <v6LangP>0</v6LangP>
-                <vShortEn>2</vShortEn>
-                <vShortWch>2</vShortWch>
-                <v6Lto>2</v6Lto>
-                <v6WtE>2</v6WtE>
-                <v6Rtti>2</v6Rtti>
-                <VariousControls>
-                  <MiscControls></MiscControls>
-                  <Define></Define>
-                  <Undefine></Undefine>
-                  <IncludePath></IncludePath>
-                </VariousControls>
-              </Cads>
-              <Aads>
-                <interw>2</interw>
-                <Ropi>2</Ropi>
-                <Rwpi>2</Rwpi>
-                <thumb>2</thumb>
-                <SplitLS>2</SplitLS>
-                <SwStkChk>2</SwStkChk>
-                <NoWarn>2</NoWarn>
-                <uSurpInc>2</uSurpInc>
-                <useXO>2</useXO>
-                <uClangAs>2</uClangAs>
-                <VariousControls>
-                  <MiscControls></MiscControls>
-                  <Define></Define>
-                  <Undefine></Undefine>
-                  <IncludePath></IncludePath>
-                </VariousControls>
-              </Aads>
-            </GroupArmAds>
-          </GroupOption>
+          <GroupName>mebdtls</GroupName>
           <Files>
             <File>
               <FileName>aes.c</FileName>
@@ -1453,4 +1385,19 @@
     <files/>
   </RTE>
 
+  <LayerInfo>
+    <Layers>
+      <Layer>
+        <LayName>&lt;Project Info&gt;</LayName>
+        <LayDesc></LayDesc>
+        <LayUrl></LayUrl>
+        <LayKeys></LayKeys>
+        <LayCat></LayCat>
+        <LayLic></LayLic>
+        <LayTarg>0</LayTarg>
+        <LayPrjMark>1</LayPrjMark>
+      </Layer>
+    </Layers>
+  </LayerInfo>
+
 </Project>
diff --git a/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvoptx b/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvoptx
index 10118f1f..0e380e21 100644
--- a/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvoptx
+++ b/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvoptx
@@ -227,7 +227,7 @@
 
   <Group>
     <GroupName>Application/MDK-ARM</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -247,7 +247,7 @@
 
   <Group>
     <GroupName>Application/User</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -575,7 +575,7 @@
 
   <Group>
     <GroupName>Drivers/CMSIS</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -595,7 +595,7 @@
 
   <Group>
     <GroupName>tos/arch</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -639,7 +639,7 @@
 
   <Group>
     <GroupName>tos/kernel</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -935,7 +935,7 @@
 
   <Group>
     <GroupName>tos/cmsis_os</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -955,7 +955,7 @@
 
   <Group>
     <GroupName>examples</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
diff --git a/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvprojx b/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvprojx
index b7018163..061d5924 100644
--- a/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvprojx
+++ b/board/NUCLEO_STM32L496ZG/KEIL/hello_world/TencentOS_tiny.uvprojx
@@ -10,14 +10,14 @@
       <TargetName>TencentOS_tiny</TargetName>
       <ToolsetNumber>0x4</ToolsetNumber>
       <ToolsetName>ARM-ADS</ToolsetName>
-      <pCCUsed>5060750::V5.06 update 6 (build 750)::ARMCC</pCCUsed>
+      <pCCUsed>5060750::V5.06 update 6 (build 750)::.\ARMCC</pCCUsed>
       <uAC6>0</uAC6>
       <TargetOption>
         <TargetCommonOption>
           <Device>STM32L496ZGTx</Device>
           <Vendor>STMicroelectronics</Vendor>
-          <PackID>Keil.STM32L4xx_DFP.2.2.0</PackID>
-          <PackURL>http://www.keil.com/pack</PackURL>
+          <PackID>Keil.STM32L4xx_DFP.2.4.0</PackID>
+          <PackURL>http://www.keil.com/pack/</PackURL>
           <Cpu>IRAM(0x20000000-0x2004FFFF) IROM(0x8000000-0x80FFFFF) CLOCK(8000000) FPU2 CPUTYPE("Cortex-M4")</Cpu>
           <FlashUtilSpec></FlashUtilSpec>
           <StartupFile></StartupFile>
@@ -185,6 +185,7 @@
             <uocXRam>0</uocXRam>
             <RvdsVP>2</RvdsVP>
             <RvdsMve>0</RvdsMve>
+            <RvdsCdeCp>0</RvdsCdeCp>
             <hadIRAM2>0</hadIRAM2>
             <hadIROM2>0</hadIROM2>
             <StupSel>8</StupSel>
@@ -338,7 +339,7 @@
               <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER,STM32L496xx</Define>
               <Undefine></Undefine>
-              <IncludePath>..\..\BSP\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc\Legacy;..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\..\..\kernel\core\include;..\..\..\..\kernel\pm\include;..\..\..\..\osal\cmsis_os;..\..\..\..\examples\hello_world;..\..\TOS_CONFIG</IncludePath>
+              <IncludePath>..\..\BSP\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc\Legacy;..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\..\..\kernel\core\include;..\..\..\..\kernel\pm\include;..\..\..\..\osal\cmsis_os;..\..\..\..\examples\hello_world;..\..\TOS_CONFIG;..\..\..\..\net\at\include;..\..\..\..\kernel\hal\include</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
@@ -351,7 +352,7 @@
             <NoWarn>0</NoWarn>
             <uSurpInc>0</uSurpInc>
             <useXO>0</useXO>
-            <uClangAs>0</uClangAs>
+            <ClangAsOpt>4</ClangAsOpt>
             <VariousControls>
               <MiscControls></MiscControls>
               <Define></Define>
@@ -724,4 +725,19 @@
     <files/>
   </RTE>
 
+  <LayerInfo>
+    <Layers>
+      <Layer>
+        <LayName>&lt;Project Info&gt;</LayName>
+        <LayDesc></LayDesc>
+        <LayUrl></LayUrl>
+        <LayKeys></LayKeys>
+        <LayCat></LayCat>
+        <LayLic></LayLic>
+        <LayTarg>0</LayTarg>
+        <LayPrjMark>1</LayPrjMark>
+      </Layer>
+    </Layers>
+  </LayerInfo>
+
 </Project>
diff --git a/board/NUCLEO_STM32L496ZG/TOS-CONFIG/tos_config.h b/board/NUCLEO_STM32L496ZG/TOS_CONFIG/tos_config.h
similarity index 100%
rename from board/NUCLEO_STM32L496ZG/TOS-CONFIG/tos_config.h
rename to board/NUCLEO_STM32L496ZG/TOS_CONFIG/tos_config.h