@Peter
why not just using a python script?
found this one here:
#!/usr/bin/env python3
# coding: utf-8
import os
import time
import signal
import sys
import RPi.GPIO as GPIO
pin = 36 # The pin ID, edit here to change it
maxTMP = 50 # The maximum temperature in Celsius after which we trigger the fan
GPIO.setmode (GPIO.BOARD)
def setup():
GPIO.setmode(GPIO.BOARD)
GPIO.setup(pin,GPIO.OUT)
GPIO.setwarnings(False)
return()
def getCPUtemperature():
res = os.popen('vcgencmd measure_temp').readline()
temp =(res.replace("temp=","").replace("'C\n",""))
print("temp is {0}".format(temp)) #Uncomment here for testing
return temp
def fanON():
setPin(True)
return()
def fanOFF():
setPin(False)
return()
def getTEMP():
CPU_temp = float(getCPUtemperature())
if CPU_temp>maxTMP:
fanON()
else:
fanOFF()
return()
def setPin(mode): # A little redundant function but useful if you want to add logging
GPIO.output(pin, mode)
return()
try:
setup()
while True:
getTEMP()
time. sleep(8) # Read the temperature every 5 sec, increase or decrease this limit if you want
except KeyboardInterrupt: # trap a CTRL+C keyboard interrupt
GPIO.cleanup()
