How did you sort it in the end?
I might experience the same issue on my build. I have a Pi4 running pCP with a Digi2 Pro. I noticed that pins 3 and 5 are used by the HiFiBerry board. In my case those two GPIO pins are used by my PiSugar UPS. I'm planning to use a power-off/power-on pushbutton but figured I couldn't add another potential conflict to the 3 and 5 pins so started to look at using 39 and 40, but Digi2 Pro is connected to 40 as well. The folks at HiFiBerry warn about sharing pins but don't mention how to get around sharing issues.
I might experience the same issue on my build. I have a Pi4 running pCP with a Digi2 Pro. I noticed that pins 3 and 5 are used by the HiFiBerry board. In my case those two GPIO pins are used by my PiSugar UPS. I'm planning to use a power-off/power-on pushbutton but figured I couldn't add another potential conflict to the 3 and 5 pins so started to look at using 39 and 40, but Digi2 Pro is connected to 40 as well. The folks at HiFiBerry warn about sharing pins but don't mention how to get around sharing issues.
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