Raspberry pi 4 - CPU Temperature control

• The circuit diagram is based on this https://howchoo.com/g/ote2mjkzzta/control-raspberry-pi-fan-temperature-python website.
• The PID controller is based on this https://apmonitor.com/pdc/index.php/Main/TCLabPIDControl
• The PID was manually tunned
• The process starts automatically with a crontab job (on @reboot)

Don't forget to install

  sudo apt install python3-rpi.gpio
  sudo apt install python3-numpy

In case of issues ubuntu 64 bits gpiozero/gpiozero#837 (comment)

  cd /dev
  chmod og+rwx gpio*