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#!/usr/bin/python2.7 -u
 
import RPi.GPIO as GPIO
import time
import subprocess
import sys
 
fanstatus = "Off"
 
# Use GPIO 18
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(18,GPIO.OUT)
 
# Infinite Loop
while True:
    # Get the RasPi's CPU Temp
    temp = subprocess.Popen(["/usr/local/bin/cputemp","temp"], stdout=subprocess.PIPE).communicate()[0].replace("C\n","")
    # Default to verbose
    service = False
 
    # Start to cool at 43C
    if float(temp) > 43.0 and fanstatus == "Off":
        fanstatus = "On"
        GPIO.output(18,GPIO.HIGH)
    
    # Cool until we reach 38C
    if float(temp) < 38.0 and fanstatus == "On":
        fanstatus = "Off"
        GPIO.output(18,GPIO.LOW)
 
    # Be silent if we are starting at boot
    for arg in sys.argv:
        if arg == "service":
            service = True
 
    if service == False:
        # Get the current date
        date = subprocess.Popen(["/bin/date"], stdout=subprocess.PIPE).communicate()[0].replace("\n","")
        sys.stdout.write('\rTemp: '+temp+'C, Fan: '+fanstatus+' (at '+date+')      \b\b\b\b\b\b')
 
    # Sleep for a bit so we aren't a cpu hog
    time.sleep(6)