> For the complete documentation index, see [llms.txt](https://docs.arkelectron.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arkelectron.com/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier-v3/hardware/gpio-control.md).

# GPIO Control

Unlike the original PAB Carrier and Just a Jetson, the V3 does not route the Jetson's I2S0 pins to a dedicated GPIO connector. Jetson GPIO on the V3 is available on the **Pixhawk Payload Bus** and avionics connectors — see the [Pinout](broken://pages/22TqfKKHo21jaoZgsIMt) for which pins carry GPIO-capable signals.

Additional PWM/GPIO capable outputs are provided by the flight controller side of the board: 16 PWM outputs (8 FMU + 8 IO) on the avionics connectors.

For how Jetson GPIO behaves on ARK carriers — idle states, `libgpiod`/`Jetson.GPIO` usage, and safe-state patterns for actuators — see the [ARK Jetson Kernel GPIO docs](https://github.com/ARK-Electronics/ark_jetson_kernel/blob/main/docs/gpio.md).


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.arkelectron.com/products/flight-controller/jetson-pabs/ark-jetson-pab-carrier-v3/hardware/gpio-control.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.