diff --git a/applications/log2file.c b/applications/log2file.c
index 761f287..c75bdb2 100644
--- a/applications/log2file.c
+++ b/applications/log2file.c
@@ -69,4 +69,4 @@ void sys_log_file_backend_init(void)
     ulog_file_backend_enable(file_be); //必须使能才能有效
 }
 MSH_CMD_EXPORT(sys_log_file_backend_init,log2file);
-//INIT_APP_EXPORT(sys_log_file_backend_init);
+INIT_APP_EXPORT(sys_log_file_backend_init);
diff --git a/applications/ttTR.c b/applications/ttTR.c
index c659149..1e1953b 100644
--- a/applications/ttTR.c
+++ b/applications/ttTR.c
@@ -179,9 +179,10 @@ void tcpRecMQ_thread_entry(void)
         }
         else
         {
-            LOG_E("received error.");
+            msg.size=0;//收到数据长度为0表示tcp断开
+            rt_mq_send(&TTrx_mq, &msg, sizeof(msg));
+            LOG_E("tcp error, close.");
             break;
-//            return -RT_ERROR;
         }
     }
 }
diff --git a/applications/ttmsg/ttmsg.c b/applications/ttmsg/ttmsg.c
index 6f48993..f340365 100644
--- a/applications/ttmsg/ttmsg.c
+++ b/applications/ttmsg/ttmsg.c
@@ -540,6 +540,9 @@ void recTT_thread_entry()
         if (rt_mq_recv(&TTrx_mq, &msg, sizeof(msg), RT_WAITING_FOREVER) == RT_EOK)
         {
 //            LOG_D("%d Bytes received...",msg.size);
+            if (!msg.size) {//收到数据长度为0表示tcp断开
+                break;
+            }
             LOG_HEX("tcpTT", 16, msg.data, msg.size);
             //此处处理接收到数据
             rt_uint8_t rec_good[] = { 0x88, 0xAA, 0xBB, 0x88 };//前四字节
@@ -548,9 +551,6 @@ void recTT_thread_entry()
                             LOG_I("ack is good.");
                         }
         }
-        if (!isTCPok()) {//TCP断开
-            break;
-        }
     }
 }
 //INIT_COMPONENT_EXPORT(recTT_thread_entry);