pwm_fan.py uses over 10% CPU

[dynux90]

Hello,

the control script for fan speed uses a lot of CPU and cannot be hidden with python3 pwn_fan.py &

Is there a more efficient script?

[yoyojacky]

please paste the pwm_fan.py code here..

[dynux90]

please paste the pwm_fan.py code here..

import RPi.GPIO as GPIO
import time
import subprocess as sp

Fan = 8
GPIO.setmode(GPIO.BOARD)
GPIO.setup(Fan, GPIO.OUT)

p = GPIO.PWM(Fan, 50)
p.start(0)

try:
    while True:
        temp = sp.getoutput("vcgencmd measure_temp|egrep -o '[0-9]*\.[0-9]*'")
        print(temp)
        if float(temp) < 48.0:
            p.ChangeDutyCycle(0)
        elif float(temp) > 48.0 and float(temp) < 60.0:
            p.ChangeDutyCycle(50)
            time.sleep(0.1)
        elif float(temp) > 60.0:
            p.ChangeDutyCycle(100)
            time.sleep(0.1)

except KeyboardInterrupt:
    pass
p.stop()
GPIO.cleanup()

Taken from the user manual shipped with the product.