Service that will run on startup to adjust cooling fan speed based on CPU temperature.
Uing the GeeekPi 4 Extreme Cooling Heat Sink. The fan is only 2-pin so speed is adjusted using PWM.
This repo contains two programs fan_ctrl and fan_info. Fan_ctrl is installed as a systemd service that launches at startup. Fan_info can be called with the alias faninfo and shows the cpu temp and fan power percentage.
Upper and lower temperature parameters can be adjusted by modifying the values in /etc/fan_ctrl/fan_temperature_settings then restarting the service or rebooting.