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Date: Sun, 17 Apr 2022 16:54:47 +0200
Mime-Version: 1.0
From: Thomas Schneider <t.schneider@disroot.org>
Subject: Enable GPIO for RPi 4
To: ~alpine/devel@lists.alpinelinux.org
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Hello,

I want to use a RPi power button
<https://howchoo.com/g/mwnlytk3zmm/how-to-add-a-power-button-to-your-raspberry-pi>
and this requires GPIO <https://pimylifeup.com/raspberry-pi-gpio/>.

However, it looks like GPIO is disabled in RPi 4.
When I start a relevant Python program I get this error:
$ sudo /usr/bin/python3 /opt/fanshim-python/examples/poweroff.py
traceback (most recent call last):
  File "/opt/fanshim-python/examples/poweroff.py", line 12, in <module>
    GPIO.wait_for_edge(button_pin, GPIO.FALLING)
RuntimeError: Error waiting for edge

Can you please advise how to fix this issue?

This isssue is not reproducible with Raspbian OS (based on Debian).

THX
Thomas