# GPIO 64 GPI_64_INT_N on J10 signal

Source: https://forum.modalai.com/topic/5229/gpio-64-gpi_64_int_n-on-j10-signal
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2-mini
Posted: 2026-06-01 08:27:32 UTC by mkriesel
Replies: 6 · Views: 1014

## mkriesel · 2026-06-01 08:27:32 UTC

Hello, I am trying to send a signal and catch it on GPIO 64 on J10, however I can't seem to access it like the other gpios and I don't see it documented anywhere on how its referenced. Any notes will be helpful, thanks.

https://docs.modalai.com/voxl2-mini-connectors/#j10---external-uart

voxl2-mini (M0104):~$ ls /sys/class/gpio/
export    gpio1137  gpio1150  gpio1154  gpio1167  gpio1185  gpio1189  gpio1253  gpio1259      gpiochip1094
gpio1100  gpio1146  gpio1151  gpio1155  gpio1182  gpio1186  gpio1224  gpio1254  gpiochip1072  gpiochip1100
gpio1101  gpio1148  gpio1152  gpio1156  gpio1183  gpio1187  gpio1231  gpio1255  gpiochip1076  unexport
gpio1136  gpio1149  gpio1153  gpio1157  gpio1184  gpio1188  gpio1252  gpio1257  gpiochip1085

## Reply by LukeNow (ModalAI staff) · 2026-06-01 21:04:26 UTC

Hi, 

I don't believe that on the voxl2-mini anything is using that gpio so it might be possible to export. Let me look into that and get back to you. 

For context are you just trying to use it as a regular GPIO like you are describing? 

Thanks, 
-Luke

## Reply by mkriesel · 2026-06-01 21:23:07 UTC (in reply to LukeNow)

@LukeNow Correct I am just using it as a normal GPIO watching for an input signal. I'm also running SDK 1.6.3 if that helps. Thanks

## Reply by LukeNow (ModalAI staff) · 2026-06-02 16:57:44 UTC (in reply to mkriesel)

Hi @mkriesel, are you planning on using the UART functionality on the j10 connector?

## Reply by mkriesel · 2026-06-02 17:25:03 UTC (in reply to LukeNow)

@LukeNow Yes

## Reply by LukeNow (ModalAI staff) · 2026-06-03 16:59:37 UTC (in reply to mkriesel)

@mkriesel Hello, 

I have pushed some changes to enable gpio64 as an input on the meta-vox2l-bsp branch [link](https://gitlab.com/voxl-public/system-image-build/meta-voxl2-bsp/-/tree/feature/voxl2-mini-gpio64-export?ref_type=heads)

To do that please follow the build docs here to rebuild the kernel image and to push it onto your device [here](https://docs.modalai.com/voxl2-kernel-build-guide/)

In the build docs, after you build the docker image and run it, add following line to qrb5165-common.sh top level file in the build docker

 CI_META_VOXL2_BSP_BRANCH="feature/voxl2-mini-gpio64-export"  

Then run the rest of the steps, sync patch and build, as normal to build the image. 

Please also check if you need to build the kernel image with the -v var02 flag following the guide here - https://docs.modalai.com/m0054-versions/#m0054-1-and-m0054-2 , with the variant type being the same for the voxl2-mini m0104 

Let me know if that works for you!

Thanks, 
-Luke

## Reply by mkriesel · 2026-06-04 17:31:45 UTC (in reply to LukeNow)

@LukeNow This worked, thanks.