Raspberry Piのファン制御スクリプト

rpi_cooler.py

#!/usr/bin/python3

import RPi.GPIO as GPIO


def main() -> None:
    tmp = get_cpu_temp()
    print("CPU temp:{0}".format(tmp))
    if(tmp > 60):
        fan_control(True)
    elif(tmp < 50):
        fan_control(False)


def fan_control(active: bool) -> None:
    GPIO.setmode(GPIO.BCM)

    # ignore warning 'This channel is already in use.'
    GPIO.setwarnings(False)

    GPIO.setup(18, GPIO.OUT)
    GPIO.output(18, active)

    # if cleanup, output always turns off.
    # GPIO.cleanup()


def get_cpu_temp() -> None:
    with open('/sys/class/thermal/thermal_zone0/temp') as f:
        temp = f.readline()
    return int(temp) / 1000

if __name__ == '__main__':
    main()