[PROBLEM] GPIO button false trigger on startup

[waffle]

Another observation: unlike normal button presses, the false trigger doesn't appear in gpio-buttons.py output (GPIO handler is disabled in settings and run manually as Tim described in post #2):

Code:

pi@moode:~ $ sudo /var/www/command/gpio-buttons.py
/var/www/command/gpio-buttons.py:54: RuntimeWarning: This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.
  GPIO.setup(sw_1_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
/var/www/command/gpio-buttons.py:54: RuntimeWarning: A physical pull up resistor is fitted on this channel!
  GPIO.setup(sw_1_pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
2020-06-28 20:53:31 sw_1: pin=3, enabled=1, bounce_time=500, cmd=python,/home/pi/scripts/relay_toggle.py

I haven't done any digital control work with a RPi and its GPIO. With other SBCs and microcontrollers, we used software filtering, aka software debouncing, to deal with mechanical switches. I expect the technique would work for you but I'm not in a position to to work through it with you. Google is your friend.

Moode already has debounce feature. It registers all button presses with no error, no problems here.