diff --git a/app/drivers/sertrf/protocol/resend_protl.h b/app/drivers/sertrf/protocol/resend_protl.h
index 871882b..c4de39f 100644
--- a/app/drivers/sertrf/protocol/resend_protl.h
+++ b/app/drivers/sertrf/protocol/resend_protl.h
@@ -34,7 +34,7 @@ typedef enum
 
     RESEND_CMD_DATA_ACK = 0x06,
 
-    RESEND_CMD_MODE_STATUS = 0x07,
+    RESEND_CMD_ERROR_CODE = 0x07,
 
     RESEND_CMD_OTA_GET_PARAM = 0x010,
     RESEND_CMD_OTA_START = 0x011,
diff --git a/app/drivers/sertrf/sertrf.c b/app/drivers/sertrf/sertrf.c
index 98e0958..744477b 100644
--- a/app/drivers/sertrf/sertrf.c
+++ b/app/drivers/sertrf/sertrf.c
@@ -211,7 +211,8 @@ void task_thread(void* arg)
             static size_t end_time = 0;
             if(start_time - end_time > 2000)
             {
-                switch(get_protocol_status())
+                sertrf.fc_protocol_status = get_protocol_status();
+                switch(sertrf.fc_protocol_status)
                 {
                     case PROTOCOL_STATUS_OK:
                         // rgb_color_change(1, sertrf.device.last_color);
@@ -664,4 +665,11 @@ int stmisp_recv(void* data, uint16_t len, int timeout)
 int stmisp_get_length(void)
 {
     return embedded_device_get_rx_length(&sertrf.device);
+}
+
+int app_send_error_code(uint8_t error_code)
+{
+    sertrf.mode_status.sertrf_error_code = error_code;
+
+    return resend_send_data(&sertrf.resend_device, RESEND_CMD_ERROR_CODE, &sertrf.mode_status.sertrf_error_code, sizeof(sertrf_mode_status_t), 1000);
 }
\ No newline at end of file
diff --git a/app/drivers/sertrf/sertrf.h b/app/drivers/sertrf/sertrf.h
index 7d75d4f..27dc05c 100644
--- a/app/drivers/sertrf/sertrf.h
+++ b/app/drivers/sertrf/sertrf.h
@@ -21,10 +21,22 @@ typedef enum
     DATA_HANDLE_ISP_DATA,
     DATA_HANDLE_ISP_DATA_END
 }data_handle_e;
-typedef struct 
+typedef enum
+{
+    SERTRF_ERROR_NONE = 0,
+    SERTRF_ERROR_OTA_INIT = 10,                 // ota初始化失败
+    SERTRF_ERROR_OTA_DATA,                      // ota数据传输异常
+    SERTRF_ERROR_OTA_END,                       // ota 结束异常
+
+    SERTRF_ERROR_FC_ISP_UART_TYPE = 30,         // 飞控ISP 无法识别其协议
+    SERTRF_ERROR_FC_ISP_UART_DATA,              // 飞控ISP 无法收到其数据
+    SERTRF_ERROR_FC_ISP_SYNC,                   // 飞控ISP 无法与ISP建立连接，需判断BOOT键是否有效
+}sertrf_error_code_e;
+typedef struct __attribute__((packed))
 {
     data_handle_e task_state;
 
+    uint16_t sertrf_error_code;
 }sertrf_mode_status_t;
 typedef struct 
 {
@@ -55,6 +67,9 @@ typedef struct
     uint8_t efuse_mac[6];
     uint8_t efuse_mac_encrypt[6];
 
+    // 记录错误信息
+    protocol_status_e fc_protocol_status; //飞控连接端的协议状态
+
 }sertrf_t;
 
 typedef struct __attribute__((packed))