diff --git a/my_pro/myproject.c b/my_pro/myproject.c
index f24755e..40a8416 100644
--- a/my_pro/myproject.c
+++ b/my_pro/myproject.c
@@ -403,6 +403,9 @@ void cdc_entry(void *parameter)
         rt_thread_mdelay(500);
     }
 }
+
+/* 用于接收消息的信号量 */
+static struct rt_semaphore rx_sem;
 /* 接收数据回调函数 */
 static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
 {
@@ -414,19 +417,19 @@ static rt_err_t uart_input(rt_device_t dev, rt_size_t size)
 
 static void serial_thread_entry(void *parameter)
 {
-    char ch;
+    char ch[105];
 
     while (1)
     {
         /* 从串口读取一个字节的数据，没有读取到则等待接收信号量 */
-        while (rt_device_read(serial, -1, &ch, 1) != 1)
+        int Size;
+        while ((Size=rt_device_read(serial, -1, &ch, 104) )!= 1)
         {
             /* 阻塞等待接收信号量，等到信号量后再次读取数据 */
             rt_sem_take(&rx_sem, RT_WAITING_FOREVER);
         }
-        /* 读取到的数据通过串口错位输出 */
-        ch = ch + 1;
-        rt_device_write(serial, 0, &ch, 1);
+
+        rt_kprintf("%s",ch);
     }
 }
 
@@ -464,9 +467,22 @@ void serial_init(void)
 
     /* 以 DMA 接收及轮询发送方式打开串口设备 */
     rt_device_open(serial, RT_DEVICE_FLAG_INT_RX);
+    /* 设置接收回调函数 */
+    rt_device_set_rx_indicate(serial, uart_input);
     char str[] = "hello RTT\r\n";
     /* 发送字符串 */
     rt_device_write(serial, 0, str, (sizeof(str) - 1));
+     /* 创建 serial 线程 */
+    rt_thread_t thread = rt_thread_create("serial", serial_thread_entry, RT_NULL, 1024, 25, 10);
+    /* 创建成功则启动线程 */
+    if (thread != RT_NULL)
+    {
+        rt_thread_startup(thread);
+    }
+    else
+    {
+        rt_kprintf("serial Thread Create Failed!\n");
+    }
 }
 void mqt_init(void)
 {