TCPserver接收数据后通过串口转发出去，测试发现接收数据粘包。

发布于 2024-08-06 15:01:22 浏览：315 订阅该版

```c
void tcpserver_callback485(tcpclient_t client, rt_uint8_t event)
{
    int ret = 0;
    switch (event)
    {
		case TCPSERVER_EVENT_CONNECT:
			get_tcpclient_ip_485(client);
			break;
		case TCPSERVER_EVENT_RECV:
			ret = tcpserver_recv(client,net_gape485.net_rx_buf,NET_BUF_SIZE,0);
			if (ret > 0)
			{
				
				net_to_uart485(net_gape485.net_rx_buf,(uint16_t *)&ret);
			}
			break;
		case TCPSERVER_EVENT_DISCONNECT:
			rt_kprintf("client disconnect:%d\n", client->sock);
			for(uint8_t i = 0;i < SOCK_NUM_MIX;i++)
			{//断开连接清除连接数据
				if(sock_client485[i]  == client)
				{
					sock_client485[i] = RT_NULL;
				}
			}
			break;
		default:
			break;
    }
}
```
在通过串口转发数据前添加下面的代码不会出现粘包现象
tcpserver_send(client,net_gape485.net_rx_buf,ret, 0);
测试结果截图如下

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240806/670eb01999c770327682e9592574c897.png.webp)
不添加上面的代码结果粘包截图如下

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20240806/6758119e9238a77b4e27dec04e26ce06.png.webp)