diff --git a/bsp/inc/bsp_nt26k.h b/bsp/inc/bsp_nt26k.h
index b9c7ae3..42a6896 100644
--- a/bsp/inc/bsp_nt26k.h
+++ b/bsp/inc/bsp_nt26k.h
@@ -201,6 +201,8 @@ struct Nt26k_Ops
 };
 
 extern struct Nt26k_Ops nt26k_ops;
+extern rt_mutex_t nt26k_mutex;
+
 extern rt_sem_t nt26k_recv_sem;
 extern rt_sem_t nt26k_recv_msg_sem;
 extern rt_sem_t nt26k_disconnect_sem;
diff --git a/bsp/src/at_device_nt26k.c b/bsp/src/at_device_nt26k.c
index 59c9236..d1c156c 100644
--- a/bsp/src/at_device_nt26k.c
+++ b/bsp/src/at_device_nt26k.c
@@ -52,6 +52,8 @@ struct rt_completion nt26k_init_complate;
 volatile int socket_id = 0;
 volatile rt_uint8_t ntp_flag  = 0;
 
+
+
 // 将本地时间转换为对应时区时间
 void Time_Zone_Conversion(TsRtcDateTime *timeInfo)
 {
@@ -370,6 +372,7 @@ int at_send_data(struct at_device *device, const char *data, rt_size_t size)
         at_delete_resp(resp);
         return -RT_ERROR;
     }
+    rt_mutex_take(nt26k_mutex, RT_WAITING_FOREVER);
     if (at_obj_exec_cmd(device->client, resp, TCP_SEND_DATA, socket_id, data) == RT_EOK)
     {
         if ((line_buffer = at_resp_get_line(resp, 2)) != RT_NULL)
@@ -377,11 +380,13 @@ int at_send_data(struct at_device *device, const char *data, rt_size_t size)
             if (rt_strstr(line_buffer, "SEND OK") != RT_NULL)
             {
                 LOG_D("send data success, socket_id: %d", socket_id);
+                rt_mutex_release(nt26k_mutex);
                 at_delete_resp(resp);
                 return RT_EOK;
             }
         }
     }
+    rt_mutex_release(nt26k_mutex);
     at_delete_resp(resp);
     return -RT_ERROR;
 }
diff --git a/bsp/src/bsp_nt26k.c b/bsp/src/bsp_nt26k.c
index 4a02529..e2191ad 100644
--- a/bsp/src/bsp_nt26k.c
+++ b/bsp/src/bsp_nt26k.c
@@ -62,7 +62,7 @@ struct rt_event at_device_event;
 rt_sem_t nt26k_recv_sem;
 rt_sem_t nt26k_recv_msg_sem; // 用于接收信号
 rt_sem_t nt26k_disconnect_sem;
-
+rt_mutex_t nt26k_mutex;
 static rt_timer_t nt26k_timer;        // 上报心跳
 static rt_timer_t nt26k_upload_timer; // 更新本地时间定时器
 static rt_timer_t nt26k_error_timer;  // 上电失败情况下启动定时器
@@ -77,7 +77,7 @@ rt_uint8_t nt26k_disconnect_retry_flag = 0; // 用于判断是否已经启动了
 Nt26kEventIndex nt26k_event_index;
 
 rt_uint8_t power_on_send_flag = 0;
-rt_mutex_t nt26k_mutex;
+
 int BSP_Nt26k_Init(struct Nt26k_Ops *ops, rt_uint8_t version);
 int BSP_Nt26k_Update(struct Nt26k_Ops *ops, rt_uint8_t device_type, rt_uint8_t event_type);
 int Nt26k_Send_Data(struct Nt26k_Ops *ops, rt_uint8_t data_num, rt_uint8_t cmd, rt_uint8_t device_type, rt_uint8_t event_type);
@@ -346,7 +346,7 @@ int Nt26k_Send_Data(struct Nt26k_Ops *ops, rt_uint8_t data_num, rt_uint8_t cmd,
         return RT_ERROR;
     }
     rt_memset(ops->body, 0, sizeof(struct DataBody));
-    rt_mutex_take(nt26k_mutex, RT_WAITING_FOREVER);
+    
     ret = nt26k_ops.update_data(ops, device_type, event_type);
     if (ret == RT_EOK)
     {
@@ -361,7 +361,7 @@ int Nt26k_Send_Data(struct Nt26k_Ops *ops, rt_uint8_t data_num, rt_uint8_t cmd,
             ret = -ret;
         }
     }
-    rt_mutex_release(nt26k_mutex);
+    
     return ret;
 }
 
@@ -811,6 +811,7 @@ int Nt26k_Process_Events(Nt26kEvent nt26k_recv_event, struct at_device *device,
                     if (result != RT_EOK)
                     {
                         LOG_E("nt26k send failed\n");
+                        nt26k_connect_sever_flag = 1;
                         ret = RT_ERROR;
                         continue;
                     }
@@ -825,7 +826,7 @@ int Nt26k_Process_Events(Nt26kEvent nt26k_recv_event, struct at_device *device,
                         }
                         else
                         {
-                            // 收不到说明在平台未注册,此时nt26k_connect_sever_flag 为0，但nt26k_conncet_tcp_flag = 1；此时不发起重连，等待事件触发就行
+                            // 收不到说明在平台未注册或者信号不行,此时nt26k_connect_sever_flag 为0，但nt26k_conncet_tcp_flag = 1；此时不发起重连，等待事件触发就行
                             nt26k_connect_sever_flag = 0;
                             ret                      = RT_ERROR;
                         }