> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/ethernet-rov-locator/connecting-and-powering-your-rovle-ethernet-receiver-or-transceiver/rovl-wiring/rovl-e-pc-board-internal-connections/serial-connection.md).

# Serial Connection

{% hint style="warning" %}
The ROVL is set at the factor to be either TTL-serial or USB. Just changing the cable is not enough to switch the interface between serial and USB. Contact the factory for help if you need to make this change.
{% endhint %}

### ROVL Serial Connection

<figure><img src="/files/T2WjBDK5CScTzJyvWPUv" alt=""><figcaption></figcaption></figure>