I have a project that is utilizing a carrier board (balenaFin) and a Raspberry Pi Compute Module 3. The node red utilized some of the pins as digital inputs and outputs. It was up and working fine, then we were sent the CM3+ to put on the carrier board. I am using balena cloud and my dockerfile h…

And I also swap the carrier out with another CM3+ just to make sure it wasn't the that the RPi CM3+ was bad. Same results

I've not looked or ever played with a CM3 - but I would look to see if the BCM pin numbers are mapped differently to physical pin numbers and GPIO numbering.

Thanks, according to the documentation from Raspberry Pi both the CM3 and CM3+ blade pins are the same as I checked that as well, so it should be a drop in replacement as far as I can tell. Of course the table is quite big so I could be wrong but it appears identical

@dceejay @knolleary I've seen you two on a majority of the forums I read to help solve my issues so I figured you two were the best to contact and point me in the right direction. Someone at the carrier board manufacturer was able to solve the issue. They said "it turns out one of the dependencies …

So just to check... the Node-RED node lets you select the pins you do want to use? I don't think we remove any modules ? the latest gpio package is not part of the core but is still available here - https://www.npmjs.com/package/node-red-node-pi-gpio - and does indeed rely on the RPi.GPIO package f…

Yes that is correct. Node red allows the selection, however once its selected it shows a little red box with "Stopped" next to it. I also noticed in the RPi.GPIO ( https://pypi.org/project/RPi.GPIO/ ) version 0.5.11 it mentions a fix for pins >26

So which version of RPi.GPIO are you running ?

I show that I have version 0.6.5 installed. I just thought It might help for troubleshooting

Can you try some pure python to test the library against the CM modules ? eg like https://raspi.tv/2013/rpi-gpio-basics-2-how-to-check-what-pi-board-revision-you-have see if they do indeed report differently so we can report it.

Here is what appeared when following the instructions you gave on the link [REVISION] [version]

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CM3 & CM3+ with node red gpio

General

Ivan 10 December 2020 07:15 12

HI.

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CM3 & CM3+ with node red gpio

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