diff --git a/applications/RS_485.c b/applications/RS_485.c
index 1abc79e..394d667 100644
--- a/applications/RS_485.c
+++ b/applications/RS_485.c
@@ -57,7 +57,7 @@ static rt_err_t uart485_input(rt_device_t dev, rt_size_t size)
     cachecnt += size;
     if (cachecnt < 63) {
 //        LOG_W("not enough data[%d byte(s)], cached and waiting...",size);//处理半包
-        LOG_D("%d byte(s)",size);
+//        LOG_D("%d byte(s)",size);
         return -1;
     }
     msg.dev = dev;
@@ -187,7 +187,7 @@ static void T485_thread_entry(void *parameter)
             rt_pin_write(TR485_RE, PIN_HIGH);
             rt_device_write(serial485, 0, cmd, sizeof(cmd));
             rt_pin_write(TR485_RE, PIN_LOW);
-            LOG_D("send 485");
+//            LOG_D("send 485");
         }
         rt_thread_mdelay(10*1000);
     }
diff --git a/applications/main.c b/applications/main.c
index 6287008..948d84e 100644
--- a/applications/main.c
+++ b/applications/main.c
@@ -86,7 +86,7 @@ void show_version(void)
     char str[30];
     uint8_t t[10];
     size_t len=time2Byte(t);
-    rt_kprintf("SW Version: %s, build-%s\n","1.9d",bytes2str(t, 3, 10, "", str));
+    rt_kprintf("SW Version: %s, build-%s\n","2.1d",bytes2str(t, 3, 10, "", str));
 }
 
 MSH_CMD_EXPORT(show_version,显示版本号);