fancontrol.py

#!/usr/bin/python

import RPi.GPIO as GPIO
import os, sys, traceback, signal

from time import sleep
from re import findall
from subprocess import check_output

def gpio_cleanup(signum, frame):
	raise  KeyboardInterrupt

def get_temp():
	temp = os.popen('/opt/vc/bin/vcgencmd measure_temp').readline()
	temp = float(findall('\d+\.\d+', temp)[0])
	return(temp)
try:
	tempOn = 72             # Temp Cooler On
	tempOff = 45		# Temp Cooler Off
	controlPin = 14         # Control Pin Number
	latencyTime = 10	# Time in sec between temperature measuring 
	pinState = False
	# === Init Pins
	GPIO.setmode(GPIO.BCM)
	GPIO.setup(controlPin, GPIO.OUT, initial=0)
	signal.signal(signal.SIGTERM, gpio_cleanup)
	signal.signal(signal.SIGINT, gpio_cleanup)
	while True:
		temp = get_temp()
		if temp > tempOn and not pinState or temp < tempOff and pinState:
			pinState = not pinState
			GPIO.output(controlPin, pinState)
			print(str(temp) + "  " + str(pinState))
		sleep(latencyTime)
except KeyboardInterrupt:
	# ...
	print("Exit pressed Ctrl+C")
except:
	# ...
	print("Other Exception")
	print("--- Start Exception Data:")
	traceback.print_exc(limit=2, file=sys.stdout)
	print("--- End Exception Data:")
finally:
	print("CleanUp")
	GPIO.cleanup()
	print("End of Program");