# Using J18 for expander I/O Board

Source: https://forum.modalai.com/topic/5022/using-j18-for-expander-i-o-board
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2
Posted: 2026-01-29 22:46:52 UTC by magnetocircuit
Replies: 1 · Views: 151

## magnetocircuit · 2026-01-29 22:46:52 UTC

The VOXL2 I/O Board is meant to connect to J19, but I am using both channels on this connector for other peripherals. Does anyone know if J18 can be used for this? I am planning to use this expander board for controlling some generic PWM ESCs and servos. Thanks!

## Reply by Eric Katzfey (ModalAI staff) · 2026-01-29 22:57:31 UTC

@magnetocircuit Yes, this is supported. In the config file for px4 `/etc/modalai/voxl-px4.conf` set `ESC=VOXL2_IO_PWM_ESC`.