diff --git a/main/APP/README.md b/main/APP/README.md
index e69de29..0d410b5 100644
--- a/main/APP/README.md
+++ b/main/APP/README.md
@@ -0,0 +1,2 @@
+每个APP调用不同的service来组成不同的功能
+module间通过消息队列进行功能
\ No newline at end of file
diff --git a/main/APP/main_app/main_app.c b/main/APP/main_app/main_app.c
index 5bcca77..e14d1ae 100644
--- a/main/APP/main_app/main_app.c
+++ b/main/APP/main_app/main_app.c
@@ -33,15 +33,19 @@
 #include "main_common.h"
 #include "shell_port.h"
 
+#include "imp_msg_queue.h"
+#include "ext_trans_service.h"
+
 /* define --------------------------------------------------------------------*/
 /* typedef -------------------------------------------------------------------*/
 /* variables -----------------------------------------------------------------*/
 
-static uint8_t print_en = 0;
+static uint8_t          print_en     = 0;
+static imp_msg_queue_t* msg_q_handle = NULL;
 
 /* Private function(only *.c)  -----------------------------------------------*/
 
-uint8_t _set_print_en(int argc, char **argv)
+uint8_t _set_print_en(int argc, char** argv)
 {
     if (argc < 2) {
         cdc_printf("too few argv\r\n");
@@ -50,14 +54,50 @@ uint8_t _set_print_en(int argc, char **argv)
     print_en = en_v;
     return 0;
 }
+
+uint8_t _set_send_msg_to(int argc, char** argv)
+{
+    if (argc < 3) {
+        cdc_printf("too few argv: cmd sendtoid value_num\r\n");
+    }
+    uint16_t send_to_id = (uint16_t)atoi(argv[1]);
+    int      value_num  = atoi(argv[2]);
+
+    imp_msg_item_t msg_item = { 0 };
+    msg_item.msg_data       = value_num;
+    imp_msg_queue_send_msg(msg_q_handle, send_to_id, &msg_item);
+    cdc_printf("send from %d to %d value %d ok\r\n", msg_item.send_id,
+               msg_item.recv_id, msg_item.msg_data);
+    return 0;
+}
+
+uint8_t _main_task_wake_up_services()
+{
+    xTaskCreate(imp_ext_trans_service_task,
+                imp_main_task_table[IMP_TASK_ID_EXT_TRANS_SERVICE_TASK], 2048,
+                NULL, 10, NULL);
+    return 0;
+}
+
 /* Exported functions --------------------------------------------------------*/
 
 uint8_t imp_main_app_task()
 {
-    int i = 0;
+    uint16_t i   = 0;
+    msg_q_handle = imp_msg_queue_create_handle(IMP_TASK_ID_MAIN_TASK);
+    imp_msg_item_t msg_item = { 0 };
+
+    _main_task_wake_up_services();
+
     while (1) {
         if (print_en) {
-            cdc_printf("hello %d\r\n", i++);
+            cdc_printf("hello %d\r\n", i);
+        }
+
+        if (i++ % 4 == 0) {
+            msg_item.msg_data = i;
+            imp_msg_queue_send_msg(
+                msg_q_handle, IMP_TASK_ID_EXT_TRANS_SERVICE_TASK, &msg_item);
         }
 
         vTaskDelay(1000 / portTICK_PERIOD_MS);
@@ -67,6 +107,8 @@ uint8_t imp_main_app_task()
 
 SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN),
                  main_pe, _set_print_en, set print value);
+SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_MAIN),
+                 main_msg_to, _set_send_msg_to, send msg to other task);
 
 /*
  * EOF
diff --git a/main/APP/main_app/main_app.h b/main/APP/main_app/main_app.h
index f6bce4d..6082536 100644
--- a/main/APP/main_app/main_app.h
+++ b/main/APP/main_app/main_app.h
@@ -29,6 +29,7 @@ extern "C" {
 /* Includes ------------------------------------------------------------------*/
 
 #include <stdint.h>
+#include "main_common.h"
 
 /* define --------------------------------------------------------------------*/
 /* typedef -------------------------------------------------------------------*/
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index ba97d06..5360c41 100755
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -12,6 +12,8 @@ idf_component_register(
     "utilities/imp_util_ring_queue/"
     "utilities/imp_types/"
     "APP/main_app/"
+    "components/msq_queue"
+    "services/ext_trans_service"
     
     EXCLUDE_SRCS 
     "utilities/usb_cherry/CherryUSB/class/cdc/usbh_cdc_acm.c"
@@ -34,6 +36,8 @@ idf_component_register(
     "utilities/imp_util_ring_queue/"
     "APP/main_app/"
     "utilities/imp_types/"
+    "components/msq_queue"
+    "services/ext_trans_service"
 
     LDFRAGMENTS 
     "utilities/letter_shell/port/esp-idf/shell.lf"
diff --git a/main/components/README.md b/main/components/README.md
new file mode 100644
index 0000000..ca38801
--- /dev/null
+++ b/main/components/README.md
@@ -0,0 +1 @@
+component是
\ No newline at end of file
diff --git a/main/components/msq_queue/imp_msg_queue.c b/main/components/msq_queue/imp_msg_queue.c
new file mode 100644
index 0000000..7df4959
--- /dev/null
+++ b/main/components/msq_queue/imp_msg_queue.c
@@ -0,0 +1,124 @@
+/**
+ * @file imp_msg_queue.c
+ * @author Alvin Young (impressionyang@outlook.com)
+ * @brief 
+ * @version 0.1
+ * @date 2024-12-04
+ * 
+ *      _                            _                              
+ *     (_)_ _  ___  _______ ___ ___ (_)__  ___  __ _____ ____  ___ _
+ *    / /  ' \/ _ \/ __/ -_|_-<(_-</ / _ \/ _ \/ // / _ `/ _ \/ _ `/
+ *   /_/_/_/_/ .__/_/  \__/___/___/_/\___/_//_/\_, /\_,_/_//_/\_, / 
+ *          /_/                               /___/          /___/  
+ * @copyright Copyright (c) 2024 impressionyang
+ * 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date           <th>Version  <th>Author         <th>Description
+ * <tr><td>2024-12-04     <td>v1.0     <td>Alvin Young     <td>首次创建
+ * </table>
+ * 
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+/* Includes ------------------------------------------------------------------*/
+#include "imp_msg_queue.h"
+#include "main_common.h"
+#include <stdlib.h>
+#include <string.h>
+/* define --------------------------------------------------------------------*/
+/* typedef -------------------------------------------------------------------*/
+/* variables -----------------------------------------------------------------*/
+
+/// @brief 消息队列的freeRTOS句柄
+static QueueHandle_t sg_imp_msg_queue = NULL;
+
+/* Private function(only *.c)  -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+uint8_t imp_msg_queue_init()
+{
+    sg_imp_msg_queue =
+        xQueueCreate(IMP_MSG_QUEUE_MAX_ITEM_COUNT, sizeof(imp_msg_item_t));
+    if (sg_imp_msg_queue != NULL) {
+        cdc_printf("msg queue init ok!\n");
+    } else {
+        cdc_printf("msg queue init failed!\n");
+        return 1;
+    }
+    return 0;
+}
+
+imp_msg_queue_t* imp_msg_queue_create_handle(uint16_t task_id)
+{
+    if (NULL == sg_imp_msg_queue) {
+        cdc_printf("msg queue create failed!\n");
+        return NULL;
+    }
+    imp_msg_queue_t* ptr  = (imp_msg_queue_t*)malloc(sizeof(imp_msg_queue_t*));
+    ptr->is_init          = 1;
+    ptr->msg_queue_handle = sg_imp_msg_queue;
+    ptr->task_id          = task_id;
+    ptr->task_name        = imp_main_task_table[task_id];
+    return ptr;
+}
+
+uint8_t imp_msg_queue_recv_msg(imp_msg_queue_t* handle, imp_msg_item_t* msg,
+                               uint16_t timeout)
+{
+    if (NULL == sg_imp_msg_queue || NULL == handle) {
+        cdc_printf("handle or msg queue is NULL\n");
+        return 1;
+    }
+    BaseType_t     msg_queue_return;
+    imp_msg_item_t item = { 0 };
+
+    msg_queue_return = xQueuePeek(handle->msg_queue_handle, &item, timeout);
+    if (msg_queue_return != pdTRUE) {
+        return 2;
+    } else {
+        // read succeed
+        if (item.recv_id == handle->task_id) {
+            xQueueReceive(handle->msg_queue_handle, msg, 0);
+            if (msg->recv_id == handle->task_id) {
+                return 0;
+            }
+            return 3;
+        }
+    }
+    return 4;
+}
+
+uint8_t imp_msg_queue_send_msg(imp_msg_queue_t* handle, uint16_t recv_id,
+                               imp_msg_item_t* msg)
+{
+    if (NULL == sg_imp_msg_queue || NULL == handle) {
+        cdc_printf("handle or msg queue is NULL\n");
+        return 1;
+    }
+    BaseType_t msg_queue_return;
+
+    msg->send_id     = handle->task_id;
+    msg->recv_id     = recv_id;
+    msg_queue_return = xQueueSend(handle->msg_queue_handle, msg, portMAX_DELAY);
+
+    return 0;
+}
+
+uint8_t imp_msg_queue_destroy_handle(imp_msg_queue_t* handle)
+{
+    if (NULL == sg_imp_msg_queue || NULL == handle) {
+        cdc_printf("handle or msg queue is NULL\n");
+        return 1;
+    }
+
+    handle->is_init          = 0;
+    handle->msg_queue_handle = NULL;
+    handle->task_name        = NULL;
+    handle->task_id          = 0;
+    free(handle);
+    return 0;
+}
+
+/*
+ * EOF
+ */
\ No newline at end of file
diff --git a/main/components/msq_queue/imp_msg_queue.h b/main/components/msq_queue/imp_msg_queue.h
new file mode 100644
index 0000000..9c6f0f8
--- /dev/null
+++ b/main/components/msq_queue/imp_msg_queue.h
@@ -0,0 +1,174 @@
+/**
+ * @file imp_msg_queue.h
+ * @author Alvin Young (impressionyang@outlook.com)
+ * @brief 
+ * @version 0.1
+ * @date 2024-12-03
+ * 
+ *      _                            _                              
+ *     (_)_ _  ___  _______ ___ ___ (_)__  ___  __ _____ ____  ___ _
+ *    / /  ' \/ _ \/ __/ -_|_-<(_-</ / _ \/ _ \/ // / _ `/ _ \/ _ `/
+ *   /_/_/_/_/ .__/_/  \__/___/___/_/\___/_//_/\_, /\_,_/_//_/\_, / 
+ *          /_/                               /___/          /___/  
+ * @copyright Copyright (c) 2024 impressionyang
+ * 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date           <th>Version  <th>Author         <th>Description
+ * <tr><td>2024-12-03     <td>v1.0     <td>Alvin Young     <td>首次创建
+ * </table>
+ * 
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __IMP_MSG_QUEUE_H__
+#define __IMP_MSG_QUEUE_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+
+#include <stdint.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+
+/* define --------------------------------------------------------------------*/
+
+#define IMP_MSG_QUEUE_MAX_ITEM_COUNT (20)
+/* typedef -------------------------------------------------------------------*/
+
+/// @brief 消息队列的消息内容
+typedef struct __imp_msg_item_t__
+{
+    uint16_t send_id;
+    uint16_t recv_id;
+    uint16_t msg_type;
+    union {
+        uint32_t msg_data;
+        void*    msg_data_ptr;
+    };
+    union {
+        uint32_t msg_reserve;
+        uint32_t msg_data_len;
+    };
+} imp_msg_item_t;
+
+/// @brief 消息队列的句柄
+typedef struct __imp_msg_queue_t__
+{
+    uint8_t is_init;
+    /// @brief 唯一的值代表不同的Task
+    uint16_t task_id;
+    char*    task_name;
+    /// @brief 通过create 获取消息队列句柄
+    QueueHandle_t msg_queue_handle;
+} imp_msg_queue_t;
+
+/* variables -----------------------------------------------------------------*/
+/* Private function(only *.c)  -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/**
+ * 
+ * @brief 初始化消息队列
+ * @return uint8_t 
+ * @date 2024-12-04
+ * @author Alvin Young (impressionyang@outlook.com)
+ * 
+ * @details 
+ * @note 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date             <th>Author         <th>Description
+ * <tr><td>2024-12-04      <td>Alvin Young     <td>新建
+ * </table>
+ */
+uint8_t imp_msg_queue_init();
+
+/**
+ * 
+ * @brief 获取一个消息队列控制句柄
+ * @param [in] task_id 
+ * @return imp_msg_queue_t* 
+ * @date 2024-12-04
+ * @author Alvin Young (impressionyang@outlook.com)
+ * 
+ * @details 
+ * @note 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date             <th>Author         <th>Description
+ * <tr><td>2024-12-04      <td>Alvin Young     <td>新建
+ * </table>
+ */
+imp_msg_queue_t* imp_msg_queue_create_handle(uint16_t task_id);
+
+/**
+ * 
+ * @brief 接收消息
+ * @param [in] handle 
+ * @param [in] msg 
+ * @return uint8_t 
+ * @date 2024-12-04
+ * @author Alvin Young (impressionyang@outlook.com)
+ * 
+ * @details 
+ * @note 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date             <th>Author         <th>Description
+ * <tr><td>2024-12-04      <td>Alvin Young     <td>新建
+ * </table>
+ */
+uint8_t imp_msg_queue_recv_msg(imp_msg_queue_t* handle, imp_msg_item_t* msg,
+                               uint16_t timeout);
+
+/**
+ * 
+ * @brief 发送消息
+ * @param [in] handle 
+ * @param [in] recv_id 
+ * @param [in] msg 
+ * @return uint8_t 
+ * @date 2024-12-04
+ * @author Alvin Young (impressionyang@outlook.com)
+ * 
+ * @details 
+ * @note 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date             <th>Author         <th>Description
+ * <tr><td>2024-12-04      <td>Alvin Young     <td>新建
+ * </table>
+ */
+uint8_t imp_msg_queue_send_msg(imp_msg_queue_t* handle, uint16_t recv_id,
+                               imp_msg_item_t* msg);
+
+/**
+ * 
+ * @brief 销毁一个消息队列控制句柄
+ * @param [in] handle 
+ * @return uint8_t 
+ * @date 2024-12-04
+ * @author Alvin Young (impressionyang@outlook.com)
+ * 
+ * @details 
+ * @note 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date             <th>Author         <th>Description
+ * <tr><td>2024-12-04      <td>Alvin Young     <td>新建
+ * </table>
+ */
+uint8_t imp_msg_queue_destroy_handle(imp_msg_queue_t* handle);
+
+#ifdef __cplusplus
+}
+#endif
+#endif  //__IMP_MSG_QUEUE_H__
+
+/*
+ * EOF
+ */
\ No newline at end of file
diff --git a/main/main.c b/main/main.c
index 0a38b8a..c08b037 100755
--- a/main/main.c
+++ b/main/main.c
@@ -20,6 +20,7 @@
 #include "shell_port.h"
 #include "main_app.h"
 #include "main_common.h"
+#include "imp_msg_queue.h"
 
 static void _init_esp()
 {
@@ -47,14 +48,14 @@ void app_main(void)
     esp_chip_info_t chip_info;
     uint32_t        flash_size;
     esp_chip_info(&chip_info);
-    cdc_printf("This is %s chip with %d CPU core(s), %s%s%s%s, ", CONFIG_IDF_TARGET,
-           chip_info.cores,
-           (chip_info.features & CHIP_FEATURE_WIFI_BGN) ? "WiFi/" : "",
-           (chip_info.features & CHIP_FEATURE_BT) ? "BT" : "",
-           (chip_info.features & CHIP_FEATURE_BLE) ? "BLE" : "",
-           (chip_info.features & CHIP_FEATURE_IEEE802154)
-               ? ", 802.15.4 (Zigbee/Thread)"
-               : "");
+    cdc_printf("This is %s chip with %d CPU core(s), %s%s%s%s, ",
+               CONFIG_IDF_TARGET, chip_info.cores,
+               (chip_info.features & CHIP_FEATURE_WIFI_BGN) ? "WiFi/" : "",
+               (chip_info.features & CHIP_FEATURE_BT) ? "BT" : "",
+               (chip_info.features & CHIP_FEATURE_BLE) ? "BLE" : "",
+               (chip_info.features & CHIP_FEATURE_IEEE802154)
+                   ? ", 802.15.4 (Zigbee/Thread)"
+                   : "");
 
     unsigned major_rev = chip_info.revision / 100;
     unsigned minor_rev = chip_info.revision % 100;
@@ -64,12 +65,13 @@ void app_main(void)
         return;
     }
 
-    cdc_printf("%" PRIu32 "MB %s flash\r\n", flash_size / (uint32_t)(1024 * 1024),
-           (chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded"
-                                                         : "external");
+    cdc_printf("%" PRIu32 "MB %s flash\r\n",
+               flash_size / (uint32_t)(1024 * 1024),
+               (chip_info.features & CHIP_FEATURE_EMB_FLASH) ? "embedded"
+                                                             : "external");
 
     cdc_printf("Minimum free heap size: %" PRIu32 " bytes\r\n",
-           esp_get_minimum_free_heap_size());
+               esp_get_minimum_free_heap_size());
 
     // for (int i = 10; i >= 0; i--) {
     //     printf("Restarting in %d seconds...\n", i);
@@ -77,6 +79,8 @@ void app_main(void)
     // }
     cdc_printf("start run app:\r\n");
 
+
+    imp_msg_queue_init();
     xTaskCreate(imp_main_app_task, "main", 2048, NULL, 10, NULL);
 
     while (1) {
diff --git a/main/main_common.c b/main/main_common.c
new file mode 100644
index 0000000..5e1f535
--- /dev/null
+++ b/main/main_common.c
@@ -0,0 +1,39 @@
+/**
+ * @file main_common.c
+ * @author Alvin Young (impressionyang@outlook.com)
+ * @brief 
+ * @version 0.1
+ * @date 2024-12-04
+ * 
+ *      _                            _                              
+ *     (_)_ _  ___  _______ ___ ___ (_)__  ___  __ _____ ____  ___ _
+ *    / /  ' \/ _ \/ __/ -_|_-<(_-</ / _ \/ _ \/ // / _ `/ _ \/ _ `/
+ *   /_/_/_/_/ .__/_/  \__/___/___/_/\___/_//_/\_, /\_,_/_//_/\_, / 
+ *          /_/                               /___/          /___/  
+ * @copyright Copyright (c) 2024 impressionyang
+ * 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date           <th>Version  <th>Author         <th>Description
+ * <tr><td>2024-12-04     <td>v1.0     <td>Alvin Young     <td>首次创建
+ * </table>
+ * 
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+/* Includes ------------------------------------------------------------------*/
+#include "main_common.h"
+/* define --------------------------------------------------------------------*/
+/* typedef -------------------------------------------------------------------*/
+/* variables -----------------------------------------------------------------*/
+
+/// @brief 所有Task的命名集合，名字长度不能超过configMAX_TASK_NAME_LEN = 16
+char* imp_main_task_table[] = {
+    "idle",
+    "main_task",
+    "ext_trans_task",
+};
+/* Private function(only *.c)  -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+/*
+ * EOF
+ */
\ No newline at end of file
diff --git a/main/main_common.h b/main/main_common.h
index 0e15478..d0bc67d 100644
--- a/main/main_common.h
+++ b/main/main_common.h
@@ -29,13 +29,21 @@ extern "C" {
 
 /* Includes ------------------------------------------------------------------*/
 /* define --------------------------------------------------------------------*/
+
+#define IMP_TASK_ID_IDLE (0)
+#define IMP_TASK_ID_MAIN_TASK (1)
+#define IMP_TASK_ID_EXT_TRANS_SERVICE_TASK (2)
+
 /* typedef -------------------------------------------------------------------*/
 /* variables -----------------------------------------------------------------*/
+
+extern char* imp_main_task_table[];
+
 /* Private function(only *.c)  -----------------------------------------------*/
 /* Exported functions --------------------------------------------------------*/
 
-extern void cdc_acm_msc_init();
-extern int  cdc_printf(const char* fmt, ...);
+extern void         cdc_acm_msc_init();
+extern int          cdc_printf(const char* fmt, ...);
 extern signed short cdc_usb_read_bytes(char* data, unsigned short len);
 extern signed short cdc_usb_writ_bytes(char* data, unsigned short len);
 
diff --git a/main/services/README.md b/main/services/README.md
new file mode 100644
index 0000000..f19bbab
--- /dev/null
+++ b/main/services/README.md
@@ -0,0 +1 @@
+service是某个专门的功能集合，具备多线程资源，他自己就是一个线程，通过调动不同的component进行特定的事项
\ No newline at end of file
diff --git a/main/services/ext_trans_service/ext_trans_service.c b/main/services/ext_trans_service/ext_trans_service.c
new file mode 100644
index 0000000..893d489
--- /dev/null
+++ b/main/services/ext_trans_service/ext_trans_service.c
@@ -0,0 +1,59 @@
+/**
+ * @file ext_trans_service.c
+ * @author Alvin Young (impressionyang@outlook.com)
+ * @brief 
+ * @version 0.1
+ * @date 2024-12-04
+ * 
+ *      _                            _                              
+ *     (_)_ _  ___  _______ ___ ___ (_)__  ___  __ _____ ____  ___ _
+ *    / /  ' \/ _ \/ __/ -_|_-<(_-</ / _ \/ _ \/ // / _ `/ _ \/ _ `/
+ *   /_/_/_/_/ .__/_/  \__/___/___/_/\___/_//_/\_, /\_,_/_//_/\_, / 
+ *          /_/                               /___/          /___/  
+ * @copyright Copyright (c) 2024 impressionyang
+ * 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date           <th>Version  <th>Author         <th>Description
+ * <tr><td>2024-12-04     <td>v1.0     <td>Alvin Young     <td>首次创建
+ * </table>
+ * 
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+/* Includes ------------------------------------------------------------------*/
+
+#include "ext_trans_service.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "imp_msg_queue.h"
+
+/* define --------------------------------------------------------------------*/
+/* typedef -------------------------------------------------------------------*/
+/* variables -----------------------------------------------------------------*/
+
+static imp_msg_queue_t* msg_q_handle = NULL;
+/* Private function(only *.c)  -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+uint8_t imp_ext_trans_service_task()
+{
+    int i = 0;
+    msg_q_handle =
+        imp_msg_queue_create_handle(IMP_TASK_ID_EXT_TRANS_SERVICE_TASK);
+    imp_msg_item_t msg_item     = { 0 };
+    uint8_t        msg_read_ret = 0;
+    while (1) {
+        msg_read_ret = imp_msg_queue_recv_msg(msg_q_handle, &msg_item, 0);
+        if (!msg_read_ret) {
+            // read succeed
+            cdc_printf("read msg ok from %d to %d value: %d\r\n",
+                       msg_item.send_id, msg_item.recv_id, msg_item.msg_data);
+        }
+        vTaskDelay(100 / portTICK_PERIOD_MS);
+    }
+    return 0;
+}
+
+/*
+ * EOF
+ */
\ No newline at end of file
diff --git a/main/services/ext_trans_service/ext_trans_service.h b/main/services/ext_trans_service/ext_trans_service.h
new file mode 100644
index 0000000..3b80889
--- /dev/null
+++ b/main/services/ext_trans_service/ext_trans_service.h
@@ -0,0 +1,51 @@
+/**
+ * @file ext_trans_service.h
+ * @author Alvin Young (impressionyang@outlook.com)
+ * @brief 用来界定外部串口输出的内容是字符流还是控制流的，需要完成的操作为分割控制流
+ * 和字符流，控制流交给控制模块同时切断cdc_printf的功能，字符流则释放cdc_printf的打
+ * 印内容权限
+ * @version 0.1
+ * @date 2024-12-03
+ * 
+ *      _                            _                              
+ *     (_)_ _  ___  _______ ___ ___ (_)__  ___  __ _____ ____  ___ _
+ *    / /  ' \/ _ \/ __/ -_|_-<(_-</ / _ \/ _ \/ // / _ `/ _ \/ _ `/
+ *   /_/_/_/_/ .__/_/  \__/___/___/_/\___/_//_/\_, /\_,_/_//_/\_, / 
+ *          /_/                               /___/          /___/  
+ * @copyright Copyright (c) 2024 impressionyang
+ * 
+ * @par 修改日志:
+ * <table>
+ * <tr><th>Date           <th>Version  <th>Author         <th>Description
+ * <tr><td>2024-12-03     <td>v1.0     <td>Alvin Young     <td>首次创建
+ * </table>
+ * 
+ */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __EXT_TRANS_SERVICE_H__
+#define __EXT_TRANS_SERVICE_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+
+#include <stdint.h>
+#include "main_common.h"
+/* define --------------------------------------------------------------------*/
+/* typedef -------------------------------------------------------------------*/
+/* variables -----------------------------------------------------------------*/
+/* Private function(only *.c)  -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+uint8_t imp_ext_trans_service_task();
+
+#ifdef __cplusplus
+}
+#endif
+#endif  //__EXT_TRANS_SERVICE_H__
+
+/*
+ * EOF
+ */
\ No newline at end of file