#!/usr/bin/env python

# Detect motion with a PIR hooked to a Raspberry Pi.

# Copyright 2014 by Akkana Peck. Share and enjoy under the GPLv2 or later.

import RPi.GPIO

class PIR:

def __init__(self, pin):

self.pin = pin

RPi.GPIO.setmode(RPi.GPIO.BCM)

RPi.GPIO.setup(self.pin, RPi.GPIO.IN)

def poll(self):

return RPi.GPIO.input(self.pin)

def set_callback(self, cb):

RPi.GPIO.add_event_detect(self.pin, RPi.GPIO.RISING, callback=cb)

if __name__ == "__main__":

import time

import sys

def motion_detected(pin):

print "Motion detected! (callback)"

pin = 7

use_callback = False

if len(sys.argv) > 1:

for arg in sys.argv[1:]:

if arg == "-c":

use_callback = True

else:

pin = int(arg)

pir = PIR(pin)

if use_callback:

pir.set_callback(motion_detected)

while True:

if use_callback:

print "Sleeping a long time ..."

time.sleep(300)

else:

if pir.poll():

print "Motion detected! (poll)"

time.sleep(1)