Hi list,
slowly trying to get known with my Pi 4 running Tumbleweed. I added a fan, and wanted to control it via GPIO. But I fail to actually control the pins :( I was trying to follow this description: https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python that uses GIOP17. So I installed the needed 'gpiozero' python package using pip. Trying the command 'pinout' that is part of it results in an error: Unable to initialize GPIO Zero. This usually means that you are not running pinout on a Raspberry Pi. If you still wish to run pinout, set the GPIOZERO_PIN_FACTORY environment variable to 'mock' and retry, or refer to the Remote GPIO section of the manual* to configure your environment to remotely access your Pi. So I export GPIOZERO_PIN_FACTORY=mock, then I get a pinout listed, I can run python, and with from gpiozero import OutputDevice fan = OutputDevice(17) I can use fan.on(), fan.off() or fan.value to set/read the state. Just the pin doesn't do anything, it always stays low :( So I wanted to get most basic and tried echo 17 > /sys/class/gpio/export but that gave me only "write error: Invalid argument" Indeed the directory only lists Pi4:~ # ls /sys/class/gpio export gpiochip446 gpiochip454 unexport which suggests lowest GPIO available is 446!? What am I missing?
