diff --git a/applications/VK_Client.c b/applications/VK_Client.c
index 161793f..00d78b3 100644
--- a/applications/VK_Client.c
+++ b/applications/VK_Client.c
@@ -7,8 +7,9 @@
 #include "rtdef.h"
 #include "rtthread.h"
 #include "rttypes.h"
+#include "VKFly/mavlink.h"
+#include "mavlink_helpers.h"
 
-#define LINK_4G
 
 char cmd_cmd[100] = {0};
 char cmd_str[100] = {0};
@@ -82,8 +83,10 @@ int16_t EC800K_Reset(void) {
 int16_t client_tcp_connect(Cclient_t *client) {
   int16_t rtn = 0;
 
-  if (lte_dev.config_sta == false) return rtn;
-  if (client->connect_sta == true) return rtn;
+  if (lte_dev.config_sta == false)
+    return rtn;
+  if (client->connect_sta == true)
+    return rtn;
 
   if (lte_dev.reset_flag == DTU_CF_NEED_RESET) {
     /*查询PDP场景*/
@@ -94,7 +97,7 @@ int16_t client_tcp_connect(Cclient_t *client) {
                                LTE_CMD_WAIT_LLONG)) {
         BSP_LTE_SendCmd(AT_QIDEACT, NETCLOSE_SUCCESS, NETCLOSE_FAILURE,
                         LTE_CMD_WAIT_LLONG);
-        //client->error_cnt++;
+        // client->error_cnt++;
         return -1;
       }
     }
@@ -134,16 +137,34 @@ int16_t client_tcp_connect(Cclient_t *client) {
   client->error_cnt = 0;
   lte_dev.reset_flag = DTU_CF_NO_NEED_RESET;
 
-  //rt_kprintf("%s\r", lte_dev.at_buf);
+  // rt_kprintf("%s\r", lte_dev.at_buf);
 
 #ifdef TRANSPARENT_MODE
 // Set_Tansparent_Mode(client);
 #endif
 
-#ifdef LINK_4G
+#ifdef EDU_TRAINING
+  mavlink_message_t msg = {0};
+  uint8_t mav_buf[MAVLINK_MAX_PACKET_LEN] = {0};
+  uint16_t mav_len = 0;
+  mavlink_dtu_status_t _status_t = {0};
+  _status_t.csq = lte_dev.csq;
+  rt_memcpy(_status_t.imei,lte_dev.imei,sizeof(_status_t.imei));
+  mavlink_msg_dtu_status_encode(1, MAV_COMP_ID_TELEMETRY_RADIO, &msg,
+                                &_status_t);
+  mav_len = mavlink_msg_to_send_buffer(mav_buf, &msg);
+
+  for (int i = 0; i < 3; i++) {
+    rt_device_write(lte_dev.com_dev, 0, mav_buf, mav_len);
+  }
+  rt_device_t fmu_com = fmu_com_get();
+  if (fmu_com != RT_NULL) {
+    rt_device_write(fmu_com, 0, mav_buf, mav_len);
+  }
+#else
   char buf[128] = {0};
-  rt_sprintf(buf, "{\"sn\":\"%s\",\"client_id\":\"%s\",\"csq\":\"%d\"}\r\n", lte_dev.iccid,
-          lte_dev.imei,lte_dev.csq);
+  rt_sprintf(buf, "{\"sn\":\"%s\",\"client_id\":\"%s\",\"csq\":\"%d\"}\r\n",
+             lte_dev.iccid, lte_dev.imei, lte_dev.csq);
 
   rt_device_write(lte_dev.com_dev, 0, buf, sizeof(buf));