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ODroid XU4 GPIO pins and ROS

asked 2018-05-21 01:09:38 -0600

updated 2018-05-21 01:21:20 -0600

Odroid running Ubuntu Mate 16.04 and ROS Kinetic. I have wiringPi2 installed for accessing the GPIO pins. I am able to use the GPIO pins through a Python script, but they require sudo access. I have a ROS node (written in Python) in which I want to access the GPIO pin data and publish to a topic. But, I am not able to do so, because wiringPi2 required sudo access, and ROS is not defined in root.

I have tried using wiringPiSetupSys() function which does not require sudo access, but that does not work i.e. I am not able to get the GPIO pin data without sudo access.

All the solutions to similar problems for Raspberry Pi platform don't seem to work for Odroid.

Thanks.

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answered 2018-05-29 04:36:03 -0600

updated 2018-06-01 04:09:04 -0600

Unfortunately, I could not find a fix to the problem with the exact specifications mentioned. However, when I tested the same code on a Raspberry Pi 3 with Raspbian, it works correctly.

So, I have concluded that the issue lies in the OS used i.e. Ubuntu Mate 16.04.

So, a solution might be to use Raspbian on Odroid itself. I am yet to test whether that works out.

Update : Raspbian doesn't exist as such for Odroid, so some other work around might be required.

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answered 2019-07-11 18:52:02 -0600

jdwolk gravatar image

Re: sudo access, you can create a gpio group and add yourself to it:

sudo addgroup gpio

sudo usermod -a -G gpio <YOUR USER>

vi /etc/udev/rules.d/90-gpiomem.rules, add:

SUBSYSTEM=="exynos-gpiomem", GROUP="gpio", MODE="0660" `

Got this from https://wiki.odroid.com/troubleshooti...

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Asked: 2018-05-21 01:09:38 -0600

Seen: 314 times

Last updated: Jul 11