# BPI-M1 UART interface

BPI-M1 have 4 UART port on board. Banana Pi M1 板卡上共有4个 UART接口

如何通过minicom接口控制您的UART接口。

1 通过ssh连接您的开发板，并且安装minicom软件：

````
sudo apt-get install minicom ```

![](uart.jpg)

2 choose serial port
````

minicom -s

```
![](uart 1.png)

  Uart port for BPI-M1

  ![](uart en.png)

now , we test UART2 ,setting as below:

![](uart 2.jpg)

save:

![](uart 3.png)

exit, minicom runing:

![](uart 4.jpg)

check Uart number:
```

dmesg | grep ttyS\*\`\`\`

so you can see UART0 is ttyS1

UART0 对应的驱动是/dev/ttyS1

3 您可以在Windows 上使用超级终端或putty软件收发串口数据，注意正确设置端口以及波特率。

![](/files/-M2HXC4WaJWGbl5asK9a)

4,测试发送"hello,pc":

在您的开发板上发送 ‘‘hello’,pc 就能在Windows上接受到 'hello, pc"

![](/files/-M2HXC4Ycqlmzjq9I0NK)

BPI-M1 上接收到 " hello Ok"

![](/files/-M2HXC4_v8L3r4NxJLnG)

5 您可以用同样方法测试 UART3(ttyS2) UART7(ttyS3)![](/files/-M2HXC4buNDYT0amdyaH)


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