I am having difficulty adding GpIO push buttons in addition to a matrix. I have a Raspberry Pi 4 with an Adafruit Hat so I have plenty of pins open. However, when I wire up a button to any of the GPIO buttons I get this warning:
RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) to disable warnings
…and the button doesn’t work. If I start up a file that does not reference the matrix, it all works flawlessly.
Whyis this? Should I not be using RPi.GPIO as an additional import? Do I have to reference something else?
More thorough question here: pi 4 - RGB Matrix interfering with GPIO button - Raspberry Pi Stack Exchange