> For the complete documentation index, see [llms.txt](https://docs.auterion.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.auterion.com/hardware-integration/ai-node/connectivity/serial-debug-connection.md).

# Serial Debug Connection

In addition to its Debug USB port, AI Node exposes two serial interfaces. One of the serial interfaces is configured as debug console and can be used to log into the device and acquire shell access.

To get started, you will need AI Node Adapter Board *(item 830-00024)* as well as IO Cable *(item 115-00037)* both of which are available in [AI Node Eval Kit.](/hardware-integration/ai-node/evaluation-kit.md#supported-components)

Connect the adapter board to AI Node IO Connector which is indicated in the image below, using the IO Cable.

<figure><img src="/files/9nLWUSHOuytZLgFtFUir" alt=""><figcaption><p>AI Node rev2, IO Connector</p></figcaption></figure>

Detailed PinOut of IO port can be found in [AI Node Interfaces](/hardware-integration/ai-node/interfaces.md). The PinOut of AI Node Adapter board is matching PinOut of *secondary/bottom* board of [Pixhawk Adapter Board for Skynode](/hardware-integration/skynode/peripherals/adapter-boards.md):

<figure><img src="/files/Dpg0NvSc5VurQ1qzQD8L" alt=""><figcaption></figcaption></figure>

The two accessible serial ports are:

<table><thead><tr><th width="155">Port</th><th>Device</th><th width="167">Port on Breakout Board</th><th>Debug Port</th></tr></thead><tbody><tr><td>UART1</td><td><code>/dev/ttyTHS0</code></td><td><code>GPS2</code></td><td>No</td></tr><tr><td>UART2</td><td><code>/dev/ttyTCU0</code></td><td><code>TELEM3</code></td><td>Shell Access</td></tr></tbody></table>

The debug port is configured to baudrate of 115200. Username is `root,` password `auterion`.


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