> For the complete documentation index, see [llms.txt](https://docs.petoi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.petoi.com/apis/raspberry-pi-serial-port-as-an-interfac/for-biboard-v0.md).

# For BiBoard V0

### Hardware Connection

Please connect the corresponding pins of the Raspberry Pi and the [BiBoard extension hat](https://docs.petoi.com/biboard/biboard-extension-hat) as follows:

5V power --> 5V

Ground --> GND

GPIO 14 (TXD) --> RX2

GPIO 15 (RXD) --> TX2

Dial the switch on the BiBoard extension hat to the UART2 side.

<figure><img src="/files/8SNuhfXh7oWiPyEWILfF" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/E4I7IUdbhuC6YzaH9pGB" alt=""><figcaption></figcaption></figure>

{% hint style="warning" %}
To ensure a good connection, you may need to solder the wires.
{% endhint %}

The [software setup](/apis/raspberry-pi-serial-port-as-an-interfac/for-biboard-v1.md#software-setup) and [serial port name on Pi](/apis/raspberry-pi-serial-port-as-an-interfac/for-biboard-v1.md#serial-port-name-on-pi) are the same as BiBoard V1.


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