> 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).


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