Door status

door-status.py

import os
import RPi.GPIO as GPIO
import time

import http.client, urllib

# Based on:
# http://raspberry.io/projects/view/reading-and-writing-from-gpio-ports-from-python/

GPIO.setmode(GPIO.BCM)

# LED will be turned on when door is closed.
GPIO.setup(18, GPIO.OUT, initial=GPIO.LOW)

# Balcony door detector
GPIO.setup(6, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
GPIO.add_event_detect(6, GPIO.BOTH)

# Note that we keep the door status to debounce the input
def balcony_callback(pin):
  val = GPIO.input(pin)
  if (balcony_callback.status != val):
    balcony_callback.status = val
    GPIO.output(18, val)
    message = "DOOR-" + str(pin) + " is " + ("closed" if val else "open")
    send_notification(message)

balcony_callback.status = GPIO.input(6)
print("DOOR-6 is initially:", balcony_callback.status)

def send_notification(message):
  print(message)
  conn = http.client.HTTPSConnection("api.pushover.net:443")
  conn.request("POST", "/1/messages.json",
    urllib.parse.urlencode({
      "user": "XXXXXXXXXXXXXXXX",
      "token": "YYYYYYYYYYYYYYYY",
      "message": message,
    }), { "Content-type": "application/x-www-form-urlencoded" })
  response = conn.getresponse()
  print(response.read())
  conn.close()

GPIO.add_event_callback(6, balcony_callback)

try:
    while True:
       time.sleep(10)

except KeyboardInterrupt:
    print("Quitting..")

print("Bye. On eteint!")
GPIO.output(18,GPIO.LOW)

GPIO.cleanup()