<![CDATA[voxl-gpio not working as expected]]>I have tried all the listed GPIO pins exposed on connectors J7, J10, J11 and J12.
Why can't I write to a GPIO pin?

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]]>https://forum.modalai.com/topic/612/voxl-gpio-not-working-as-expectedRSS for NodeWed, 19 Aug 2026 20:25:23 GMTWed, 15 Dec 2021 21:51:51 GMT60<![CDATA[Reply to voxl-gpio not working as expected on Thu, 16 Dec 2021 21:41:22 GMT]]>Great, thanks for the info. I suspected something along those lines.

]]>https://forum.modalai.com/post/2833https://forum.modalai.com/post/2833Thu, 16 Dec 2021 21:41:22 GMT<![CDATA[Reply to voxl-gpio not working as expected on Thu, 16 Dec 2021 19:05:53 GMT]]>Hello Matthew,

When you execute voxl-gpio write, it configures the desired pin to OUTPUT mode and sets the desired state (0=low or 1=high). When you execute voxl-gpio read, the pin is configured as INPUT with a pull-up, so any previous pin state is no longer applicable. If nothing is connected to the pin while it is configured as INPUT, it will read 1 due to the pull-up.

If you would like to test the pin read and write functionality, you could set up a loop back connection, where you connect two pins together and you write one pin and read another.

I hope this helps

Alex

]]>https://forum.modalai.com/post/2830https://forum.modalai.com/post/2830Thu, 16 Dec 2021 19:05:53 GMT