import RPi.GPIO as GPIO
import time
from threading import Timer
import subprocess


GPIO.setmode(GPIO.BCM)
GPIO.setup(11, GPIO.IN)
timer = False
monitor_is_on = True

def monitor_off():
  global monitor_is_on
  subprocess.call(['/opt/vc/bin/tvservice', '-o'])
  monitor_is_on = False

def monitor_on():
  global monitor_is_on
  subprocess.call(['/opt/vc/bin/tvservice', '-p'])
  subprocess.call(['fbset -depth 8'], shell=True)
  subprocess.call(['fbset -depth 16'], shell=True)
  subprocess.call(['xrefresh'], shell=True)
  monitor_is_on = True


while True:
  time.sleep(0.5)
  movement = GPIO.input(11)
  if movement:
    if timer:
      print "canceler timer"
      timer.cancel()
      timer = False
    if not monitor_is_on:
      print "Taender skaerm"
      monitor_on()
  else:
    if not timer:
      print "starter timer"
      timer = Timer(60*5, monitor_off)
      timer.start()