diff --git a/board/NUCLEO_STM32L053R8/BSP/Inc/mcu_init.h b/board/NUCLEO_STM32L053R8/BSP/Inc/mcu_init.h
index 98d5b948..b54476b1 100644
--- a/board/NUCLEO_STM32L053R8/BSP/Inc/mcu_init.h
+++ b/board/NUCLEO_STM32L053R8/BSP/Inc/mcu_init.h
@@ -9,6 +9,7 @@
 #include "usart.h"
 #include "i2c.h"
 #include "gpio.h"
+#include "rhf76_lora.h"
 #include "tos.h"
 
 void board_init(void);
diff --git a/board/NUCLEO_STM32L053R8/BSP/Inc/rhf76_lora.h b/board/NUCLEO_STM32L053R8/BSP/Inc/rhf76_lora.h
new file mode 100644
index 00000000..321b097d
--- /dev/null
+++ b/board/NUCLEO_STM32L053R8/BSP/Inc/rhf76_lora.h
@@ -0,0 +1,41 @@
+#ifndef __RHF76_LORA_H__
+#define __RHF76_LORA_H__
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include "usart.h"
+#define  UART_RXBUF_MAXSIZE           256
+
+typedef enum _class
+{
+	CLASS_A = 1,
+	CLASS_B ,
+	CLASS_C ,
+}ENUM_CLASS_TypeDef;
+
+typedef enum _mode
+{
+	LWOTAA = 1,
+	LWABP ,
+}ENUM_MODE_TypeDef;
+
+typedef enum _id
+{
+	devaddr = 1,
+	deveui ,
+	appeui,
+}ENUM_ID_TypeDef;
+
+typedef enum _key
+{
+	appkey = 1,
+	appskey ,
+	nwkskey,
+}ENUM_KEY_TypeDef;
+
+
+void rhf76_init(void);
+int rhf76_send(const void  *buf, uint32_t len);
+#endif /* __RHF76_LORA_H__ */
+
diff --git a/board/NUCLEO_STM32L053R8/BSP/Src/mcu_init.c b/board/NUCLEO_STM32L053R8/BSP/Src/mcu_init.c
index 9dcec5ec..fc96aac4 100644
--- a/board/NUCLEO_STM32L053R8/BSP/Src/mcu_init.c
+++ b/board/NUCLEO_STM32L053R8/BSP/Src/mcu_init.c
@@ -33,7 +33,7 @@ void board_init(void)
   SystemClock_Config();
   MX_GPIO_Init();
   MX_I2C1_Init();
-  //MX_USART1_UART_Init();
+  MX_USART1_UART_Init();
   MX_USART2_UART_Init();
 
 }
diff --git a/board/NUCLEO_STM32L053R8/BSP/Src/rhf76_lora.c b/board/NUCLEO_STM32L053R8/BSP/Src/rhf76_lora.c
new file mode 100644
index 00000000..8f7a53f4
--- /dev/null
+++ b/board/NUCLEO_STM32L053R8/BSP/Src/rhf76_lora.c
@@ -0,0 +1,270 @@
+#include "rhf76_lora.h"
+#include "tos.h"
+
+uint16_t rx_rd_index  = 0;
+uint16_t rx_wr_index = 0;
+uint16_t rx_count      = 0;
+uint8_t g_rx_buf[UART_RXBUF_MAXSIZE];
+
+void g_ring_buf(uint8_t in_data)
+{
+    g_rx_buf[rx_wr_index]=in_data;
+    rx_wr_index++;
+    rx_count++;
+
+    if (rx_wr_index == UART_RXBUF_MAXSIZE)
+    {
+        rx_wr_index = 0;
+    }
+
+     /* Check for overflow */
+    if (rx_count == UART_RXBUF_MAXSIZE)
+    {
+        rx_wr_index = 0;
+        rx_count      = 0;
+        rx_rd_index  = 0;
+    }
+}
+
+static int get_rx_byte(void)
+{
+    int c = -1;
+
+    __disable_irq();
+    if (rx_count > 0)
+    {
+        c = g_rx_buf[rx_rd_index];
+
+        rx_rd_index++;
+        if (rx_rd_index == UART_RXBUF_MAXSIZE)
+        {
+            rx_rd_index = 0;
+        }
+        rx_count--;
+    }
+    __enable_irq();
+
+    return c;
+}
+
+
+void drv_uart_send(char * buf, int len)
+{
+    HAL_UART_Transmit(&huart1, (uint8_t *)buf, len,0xFFFF);
+}
+
+static int dev_uart_recv(uint8_t *buf, uint32_t len, uint32_t timeout)
+{
+      int c=0, i=0;
+
+      do
+      {
+          c = get_rx_byte();
+          if (c < 0)
+          {
+               timeout--;
+               HAL_Delay(1);
+          }
+          else
+          {
+               buf[i++] = (char)c;
+          }
+      }while(i<len && timeout>0);
+
+      return i;
+}
+
+
+bool rhf76_send_cmd(char * cmd, uint32_t len,char * reply1, char * reply2, uint32_t waittime)
+{
+    char buf[256] = {0};
+    rx_rd_index = 0;
+    rx_wr_index = 0;
+    rx_count = 0;
+    drv_uart_send((char*)cmd,len);
+    if ( ( reply1 == 0 ) && ( reply2 == 0 ) )
+        return true;
+
+    HAL_Delay( waittime );
+    dev_uart_recv((uint8_t *)buf, 120, 20);
+    printf("%s",buf);
+    if ( ( reply1 != 0 ) && ( reply2 != 0 ) )
+        return ( ( bool ) strstr ( buf, reply1 ) || 
+                     ( bool ) strstr ( buf, reply2 ) ); 
+
+    else if ( reply1 != 0 )
+        return ( ( bool ) strstr ( buf, reply1 ) );
+
+    else
+        return ( ( bool ) strstr ( buf, reply2 ) );
+}
+
+
+void rhf76_reset ( void )
+{
+	rhf76_send_cmd ( "AT+RESET\r\n", strlen("AT+RESET\r\n"),"OK", 0, 2500 );
+}
+
+void rhf76_set_id(ENUM_ID_TypeDef id_type,char *id)
+{
+	char cmd[64] = {0};
+	switch(id_type)
+	{
+		case devaddr:
+			snprintf(cmd, 64, "%s=\"%s\",\"%s\"\r\n", "AT+ID", "devaddr", id);
+			break;
+		case deveui:
+			snprintf(cmd, 64, "%s=\"%s\",\"%s\"\r\n", "AT+ID", "deveui", id);
+			break;
+		case appeui:
+			snprintf(cmd, 64, "%s=\"%s\",\"%s\"\r\n", "AT+ID", "appeui", id);
+			break;
+	}
+}
+
+void rhf76_set_key(ENUM_KEY_TypeDef key_type,char *key)
+{
+	char cmd[64] = {0};
+	switch(key_type)
+	{
+		case appkey:
+			snprintf(cmd, 64, "%s=\"%s\",%s\r\n", "AT+KEY", "appkey", key);
+			break;
+		case appskey:
+			snprintf(cmd, 64, "%s=\"%s\",%s\r\n", "AT+KEY", "appskey", key);
+			break;
+		case nwkskey:
+			snprintf(cmd, 64, "%s=\"%s\",%s\r\n", "AT+KEY", "nwkskey", key);
+			break;
+	}
+}
+
+
+void rhf76_set_class ( ENUM_CLASS_TypeDef type )
+{
+	switch( type )
+	{
+		case CLASS_A:
+			rhf76_send_cmd ( "AT+CLASS=A\r\n", strlen("AT+CLASS=A\r\n"),"+CLASS: A", 0, 2500 );
+			break;
+		case CLASS_B:
+			rhf76_send_cmd ( "AT+CLASS=B\r\n", strlen("AT+CLASS=B\r\n"),"+CLASS: B", 0, 2500 );
+			break;
+		case CLASS_C:
+			rhf76_send_cmd ( "AT+CLASS=C\r\n", strlen("AT+CLASS=C\r\n"),"+CLASS: C", 0, 2500 );
+			break;
+		default:
+			break;
+	}	
+}
+
+void rhf76_set_chanel(void)
+{
+	rhf76_send_cmd ( "at+ch=num,0-7\r\n", strlen("at+ch=num,0-7\r\n"),"NUM, 0-7", 0, 2500 );
+}
+
+void rhf76_set_adr(void)
+{
+	rhf76_send_cmd ( "at+adr=off\r\n", strlen("at+adr=off\r\n"),"OFF", 0, 2500 );
+}
+void rhf76_set_mode ( ENUM_MODE_TypeDef mode )
+{
+	switch( mode )
+	{
+		case LWOTAA:
+			rhf76_send_cmd ( "AT+MODE=LWOTAA\r\n", strlen("AT+MODE=LWOTAA\r\n"),"+MODE: LWOTAA", 0, 2500 );
+			break;
+		case LWABP:
+			rhf76_send_cmd ( "AT+MODE=LWABP\r\n", strlen("AT+MODE=LWABP\r\n"),"+MODE: LWABP", 0, 2500 );
+			break;
+		default:
+			break;
+	}
+}
+
+int32_t rhf76_join(void)
+{
+    if(rhf76_send_cmd("AT+join\r\n",strlen("AT+join\r\n"), "Network joined", "Done",14000))
+    {
+        return 0;
+    }
+
+    else
+        return -1;
+}
+
+void rhf76_init(void)
+{
+    char *key = "2B7E151628AED2A6ABF7158809CF4F3C";
+    char *appeui_id = "70B3D57ED00E0017";
+    HAL_Delay(1000);
+    printf("Init RHF76 LoRa ...\n" );
+    rhf76_reset();
+    printf("\n< 1 >\n");
+    rhf76_set_class(CLASS_A);
+    printf("\n< 2 >\n");
+    rhf76_set_chanel();
+    rhf76_set_adr();
+    rhf76_set_mode(LWOTAA);
+    rhf76_set_id(appeui,appeui_id);
+    rhf76_set_key(appkey,key);
+    printf("\n< 3 >\n");
+    rhf76_join();
+    HAL_Delay(3000);
+    printf("Init RHF76 LoRa done\n");
+}
+
+int32_t rhf76_recv_timeout(int8_t * buf, uint32_t len,
+                           int32_t timeout)
+{
+    return dev_uart_recv((uint8_t *)buf, len, timeout);
+}
+
+int32_t rhf76_recv( int8_t * buf, uint32_t len)
+{
+    return rhf76_recv_timeout(buf, len, 5000);
+}
+
+static char __num2hex(uint8_t num)
+{
+    if (num <= 0x9) {
+        return num + '0';
+    }
+
+    if ((0xA <= num) && (num <= 0xF)) {
+        return num - 0xA + 'A';
+    }
+
+    return (char)-1;
+}
+
+static void __hex2str(uint8_t *in, char *out, int len)
+{
+	int i = 0;
+
+	for (i = 0; i < len; ++i) {
+		out[i * 2] = __num2hex(in[i] >> 4);
+		out[i * 2 + 1] = __num2hex(in[i] & 0x0F);
+	}
+	out[2 * len] = '\0';
+}
+
+int rhf76_send(const void  *buf, uint32_t len)
+{    
+    char *str_buf = NULL;
+
+    str_buf = tos_mmheap_calloc(2 * len + 1, sizeof(char));
+    if (!str_buf) {
+        return -1;
+    }
+    __hex2str((uint8_t *)buf, str_buf, len);
+    
+    char cmd[100] = {0};
+    
+    snprintf(cmd, sizeof(cmd), "AT+CMSGHEX=\"%s\"\r\n", str_buf);
+    cmd[sizeof(cmd) - 1] = '\0';
+    tos_mmheap_free(str_buf);
+
+    rhf76_send_cmd((char *)cmd, strlen(cmd), (char *)"ACK Received","Done",10000);
+    return len;    
+}
diff --git a/board/NUCLEO_STM32L053R8/BSP/Src/stm32l0xx_it_module.c b/board/NUCLEO_STM32L053R8/BSP/Src/stm32l0xx_it_module.c
new file mode 100644
index 00000000..5e2096c3
--- /dev/null
+++ b/board/NUCLEO_STM32L053R8/BSP/Src/stm32l0xx_it_module.c
@@ -0,0 +1,212 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    stm32l0xx_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 "stm32l0xx_it.h"
+#include "tos.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 huart1;
+extern UART_HandleTypeDef huart2;
+/* USER CODE BEGIN EV */
+
+/* USER CODE END EV */
+
+/******************************************************************************/
+/*           Cortex-M0+ 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 System service call via SWI instruction.
+  */
+void SVC_Handler(void)
+{
+  /* USER CODE BEGIN SVC_IRQn 0 */
+
+  /* USER CODE END SVC_IRQn 0 */
+  /* USER CODE BEGIN SVC_IRQn 1 */
+
+  /* USER CODE END SVC_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();
+  }
+  /* USER CODE BEGIN SysTick_IRQn 1 */
+
+  /* USER CODE END SysTick_IRQn 1 */
+}
+
+/******************************************************************************/
+/* STM32L0xx 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_stm32l0xx.s).                    */
+/******************************************************************************/
+
+/**
+  * @brief This function handles EXTI line 0 and line 1 interrupts.
+  */
+void EXTI0_1_IRQHandler(void)
+{
+  /* USER CODE BEGIN EXTI0_1_IRQn 0 */
+
+  /* USER CODE END EXTI0_1_IRQn 0 */
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_1);
+  /* USER CODE BEGIN EXTI0_1_IRQn 1 */
+
+  /* USER CODE END EXTI0_1_IRQn 1 */
+}
+
+/**
+  * @brief This function handles EXTI line 4 to 15 interrupts.
+  */
+void EXTI4_15_IRQHandler(void)
+{
+  /* USER CODE BEGIN EXTI4_15_IRQn 0 */
+
+  /* USER CODE END EXTI4_15_IRQn 0 */
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_4);
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_7);
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_10);
+  HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_13);
+  /* USER CODE BEGIN EXTI4_15_IRQn 1 */
+
+  /* USER CODE END EXTI4_15_IRQn 1 */
+}
+
+/**
+  * @brief This function handles USART1 global interrupt / USART1 wake-up interrupt through EXTI line 25.
+  */
+void USART1_IRQHandler(void)
+{
+  /* USER CODE BEGIN USART1_IRQn 0 */
+
+  /* USER CODE END USART1_IRQn 0 */
+  HAL_UART_IRQHandler(&huart1);
+  /* USER CODE BEGIN USART1_IRQn 1 */
+
+  /* USER CODE END USART1_IRQn 1 */
+}
+
+/**
+  * @brief This function handles USART2 global interrupt / USART2 wake-up interrupt through EXTI line 26.
+  */
+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 */
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32L053R8/BSP/Src/usart.c b/board/NUCLEO_STM32L053R8/BSP/Src/usart.c
index 963e661e..52318c4b 100644
--- a/board/NUCLEO_STM32L053R8/BSP/Src/usart.c
+++ b/board/NUCLEO_STM32L053R8/BSP/Src/usart.c
@@ -21,7 +21,7 @@
 #include "usart.h"
 
 /* USER CODE BEGIN 0 */
-
+uint8_t ch;
 /* USER CODE END 0 */
 
 UART_HandleTypeDef huart1;
@@ -46,7 +46,7 @@ void MX_USART1_UART_Init(void)
   {
     Error_Handler();
   }
-
+  HAL_UART_Receive_IT(&huart1, &ch, 1);
 }
 /* USART2 init function */
 
@@ -176,7 +176,14 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
 } 
 
 /* USER CODE BEGIN 1 */
-
+//extern void g_ring_buf(uint8_t in_data);
+void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
+{
+    if (huart== &huart1) {
+        HAL_UART_Receive_IT(&huart1, &ch, 1);
+		//g_ring_buf(ch);
+    }
+}
 /* USER CODE END 1 */
 
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvoptx b/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvoptx
index 0aadb90b..f89c80f5 100644
--- a/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvoptx
+++ b/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvoptx
@@ -203,7 +203,7 @@
 
   <Group>
     <GroupName>Application/MDK-ARM</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -223,7 +223,7 @@
 
   <Group>
     <GroupName>Application/User</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -294,8 +294,8 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>..\..\BSP\Src\stm32l0xx_it.c</PathWithFileName>
-      <FilenameWithoutPath>stm32l0xx_it.c</FilenameWithoutPath>
+      <PathWithFileName>..\..\BSP\Src\usart.c</PathWithFileName>
+      <FilenameWithoutPath>usart.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -306,8 +306,20 @@
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
-      <PathWithFileName>..\..\BSP\Src\usart.c</PathWithFileName>
-      <FilenameWithoutPath>usart.c</FilenameWithoutPath>
+      <PathWithFileName>..\..\BSP\Src\stm32l0xx_it_module.c</PathWithFileName>
+      <FilenameWithoutPath>stm32l0xx_it_module.c</FilenameWithoutPath>
+      <RteFlg>0</RteFlg>
+      <bShared>0</bShared>
+    </File>
+    <File>
+      <GroupNumber>2</GroupNumber>
+      <FileNumber>9</FileNumber>
+      <FileType>1</FileType>
+      <tvExp>0</tvExp>
+      <tvExpOptDlg>0</tvExpOptDlg>
+      <bDave2>0</bDave2>
+      <PathWithFileName>..\..\BSP\Src\rhf76_lora.c</PathWithFileName>
+      <FilenameWithoutPath>rhf76_lora.c</FilenameWithoutPath>
       <RteFlg>0</RteFlg>
       <bShared>0</bShared>
     </File>
@@ -315,13 +327,13 @@
 
   <Group>
     <GroupName>Drivers/STM32L0xx_HAL_Driver</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>9</FileNumber>
+      <FileNumber>10</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -333,7 +345,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>10</FileNumber>
+      <FileNumber>11</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -345,7 +357,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>11</FileNumber>
+      <FileNumber>12</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -357,7 +369,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>12</FileNumber>
+      <FileNumber>13</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -369,7 +381,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>13</FileNumber>
+      <FileNumber>14</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -381,7 +393,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>14</FileNumber>
+      <FileNumber>15</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -393,7 +405,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>15</FileNumber>
+      <FileNumber>16</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -405,7 +417,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>16</FileNumber>
+      <FileNumber>17</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -417,7 +429,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>17</FileNumber>
+      <FileNumber>18</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -429,7 +441,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>18</FileNumber>
+      <FileNumber>19</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -441,7 +453,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>19</FileNumber>
+      <FileNumber>20</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -453,7 +465,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>20</FileNumber>
+      <FileNumber>21</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -465,7 +477,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>21</FileNumber>
+      <FileNumber>22</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -477,7 +489,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>22</FileNumber>
+      <FileNumber>23</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -489,7 +501,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>23</FileNumber>
+      <FileNumber>24</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -501,7 +513,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>24</FileNumber>
+      <FileNumber>25</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -513,7 +525,7 @@
     </File>
     <File>
       <GroupNumber>3</GroupNumber>
-      <FileNumber>25</FileNumber>
+      <FileNumber>26</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -527,13 +539,13 @@
 
   <Group>
     <GroupName>Drivers/CMSIS</GroupName>
-    <tvExp>1</tvExp>
+    <tvExp>0</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>4</GroupNumber>
-      <FileNumber>26</FileNumber>
+      <FileNumber>27</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -553,7 +565,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>5</GroupNumber>
-      <FileNumber>27</FileNumber>
+      <FileNumber>28</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -565,7 +577,7 @@
     </File>
     <File>
       <GroupNumber>5</GroupNumber>
-      <FileNumber>28</FileNumber>
+      <FileNumber>29</FileNumber>
       <FileType>2</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -577,7 +589,7 @@
     </File>
     <File>
       <GroupNumber>5</GroupNumber>
-      <FileNumber>29</FileNumber>
+      <FileNumber>30</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -597,7 +609,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>30</FileNumber>
+      <FileNumber>31</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -609,7 +621,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>31</FileNumber>
+      <FileNumber>32</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -621,7 +633,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>32</FileNumber>
+      <FileNumber>33</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -633,7 +645,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>33</FileNumber>
+      <FileNumber>34</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -645,7 +657,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>34</FileNumber>
+      <FileNumber>35</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -657,7 +669,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>35</FileNumber>
+      <FileNumber>36</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -669,7 +681,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>36</FileNumber>
+      <FileNumber>37</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -681,7 +693,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>37</FileNumber>
+      <FileNumber>38</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -693,7 +705,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>38</FileNumber>
+      <FileNumber>39</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -705,7 +717,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>39</FileNumber>
+      <FileNumber>40</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -717,7 +729,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>40</FileNumber>
+      <FileNumber>41</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -729,7 +741,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>41</FileNumber>
+      <FileNumber>42</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -741,7 +753,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>42</FileNumber>
+      <FileNumber>43</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -753,7 +765,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>43</FileNumber>
+      <FileNumber>44</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -765,7 +777,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>44</FileNumber>
+      <FileNumber>45</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -777,7 +789,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>45</FileNumber>
+      <FileNumber>46</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -789,7 +801,7 @@
     </File>
     <File>
       <GroupNumber>6</GroupNumber>
-      <FileNumber>46</FileNumber>
+      <FileNumber>47</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -809,7 +821,7 @@
     <RteFlg>0</RteFlg>
     <File>
       <GroupNumber>7</GroupNumber>
-      <FileNumber>47</FileNumber>
+      <FileNumber>48</FileNumber>
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -821,110 +833,6 @@
     </File>
   </Group>
 
-  <Group>
-    <GroupName>examples</GroupName>
-    <tvExp>1</tvExp>
-    <tvExpOptDlg>0</tvExpOptDlg>
-    <cbSel>0</cbSel>
-    <RteFlg>0</RteFlg>
-    <File>
-      <GroupNumber>8</GroupNumber>
-      <FileNumber>48</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\examples\LoRaWAN\lora_demo.c</PathWithFileName>
-      <FilenameWithoutPath>lora_demo.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-  </Group>
-
-  <Group>
-    <GroupName>devices</GroupName>
-    <tvExp>1</tvExp>
-    <tvExpOptDlg>0</tvExpOptDlg>
-    <cbSel>0</cbSel>
-    <RteFlg>0</RteFlg>
-    <File>
-      <GroupNumber>9</GroupNumber>
-      <FileNumber>49</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\devices\rhf76_lora\RHF76.c</PathWithFileName>
-      <FilenameWithoutPath>RHF76.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-  </Group>
-
-  <Group>
-    <GroupName>hal</GroupName>
-    <tvExp>1</tvExp>
-    <tvExpOptDlg>0</tvExpOptDlg>
-    <cbSel>0</cbSel>
-    <RteFlg>0</RteFlg>
-    <File>
-      <GroupNumber>10</GroupNumber>
-      <FileNumber>50</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\platform\hal\st\stm32l0xx\src\tos_hal_uart.c</PathWithFileName>
-      <FilenameWithoutPath>tos_hal_uart.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-  </Group>
-
-  <Group>
-    <GroupName>at</GroupName>
-    <tvExp>1</tvExp>
-    <tvExpOptDlg>0</tvExpOptDlg>
-    <cbSel>0</cbSel>
-    <RteFlg>0</RteFlg>
-    <File>
-      <GroupNumber>11</GroupNumber>
-      <FileNumber>51</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\net\at\src\tos_at.c</PathWithFileName>
-      <FilenameWithoutPath>tos_at.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-    <File>
-      <GroupNumber>11</GroupNumber>
-      <FileNumber>52</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\net\at\src\tos_at_utils.c</PathWithFileName>
-      <FilenameWithoutPath>tos_at_utils.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-    <File>
-      <GroupNumber>11</GroupNumber>
-      <FileNumber>53</FileNumber>
-      <FileType>1</FileType>
-      <tvExp>0</tvExp>
-      <tvExpOptDlg>0</tvExpOptDlg>
-      <bDave2>0</bDave2>
-      <PathWithFileName>..\..\..\..\net\lora_module_wrapper\lora_module_wrapper.c</PathWithFileName>
-      <FilenameWithoutPath>lora_module_wrapper.c</FilenameWithoutPath>
-      <RteFlg>0</RteFlg>
-      <bShared>0</bShared>
-    </File>
-  </Group>
-
   <Group>
     <GroupName>::CMSIS</GroupName>
     <tvExp>0</tvExp>
diff --git a/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvprojx b/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvprojx
index 3fa9e4f4..c42cac22 100644
--- a/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvprojx
+++ b/board/NUCLEO_STM32L053R8/KEIL/lorawan/NUCLEO_STM32L053R8.uvprojx
@@ -417,16 +417,21 @@
               <FileType>1</FileType>
               <FilePath>..\..\BSP\Src\stm32l0xx_hal_msp.c</FilePath>
             </File>
-            <File>
-              <FileName>stm32l0xx_it.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\BSP\Src\stm32l0xx_it.c</FilePath>
-            </File>
             <File>
               <FileName>usart.c</FileName>
               <FileType>1</FileType>
               <FilePath>..\..\BSP\Src\usart.c</FilePath>
             </File>
+            <File>
+              <FileName>stm32l0xx_it_module.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\..\BSP\Src\stm32l0xx_it_module.c</FilePath>
+            </File>
+            <File>
+              <FileName>rhf76_lora.c</FileName>
+              <FileType>1</FileType>
+              <FilePath>..\..\BSP\Src\rhf76_lora.c</FilePath>
+            </File>
           </Files>
         </Group>
         <Group>
@@ -649,56 +654,6 @@
             </File>
           </Files>
         </Group>
-        <Group>
-          <GroupName>examples</GroupName>
-          <Files>
-            <File>
-              <FileName>lora_demo.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\examples\LoRaWAN\lora_demo.c</FilePath>
-            </File>
-          </Files>
-        </Group>
-        <Group>
-          <GroupName>devices</GroupName>
-          <Files>
-            <File>
-              <FileName>RHF76.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\devices\rhf76_lora\RHF76.c</FilePath>
-            </File>
-          </Files>
-        </Group>
-        <Group>
-          <GroupName>hal</GroupName>
-          <Files>
-            <File>
-              <FileName>tos_hal_uart.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\platform\hal\st\stm32l0xx\src\tos_hal_uart.c</FilePath>
-            </File>
-          </Files>
-        </Group>
-        <Group>
-          <GroupName>at</GroupName>
-          <Files>
-            <File>
-              <FileName>tos_at.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\net\at\src\tos_at.c</FilePath>
-            </File>
-            <File>
-              <FileName>tos_at_utils.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\net\at\src\tos_at_utils.c</FilePath>
-            </File>
-            <File>
-              <FileName>lora_module_wrapper.c</FileName>
-              <FileType>1</FileType>
-              <FilePath>..\..\..\..\net\lora_module_wrapper\lora_module_wrapper.c</FilePath>
-            </File>
-          </Files>
-        </Group>
         <Group>
           <GroupName>::CMSIS</GroupName>
         </Group>
diff --git a/board/NUCLEO_STM32L053R8/TOS_CONFIG/tos_config.h b/board/NUCLEO_STM32L053R8/TOS_CONFIG/tos_config.h
index ef6d78d3..9003927f 100644
--- a/board/NUCLEO_STM32L053R8/TOS_CONFIG/tos_config.h
+++ b/board/NUCLEO_STM32L053R8/TOS_CONFIG/tos_config.h
@@ -15,7 +15,7 @@
 
 #define TOS_CFG_MMHEAP_EN               1u
 
-#define TOS_CFG_MMHEAP_POOL_SIZE        0x100
+#define TOS_CFG_MMHEAP_POOL_SIZE        0x400
 
 #define TOS_CFG_MUTEX_EN                1u