Megha

import json
import time
import requests

#importing gpio for raspberry pi
try:
    import RPi.GPIO as GPIO
except RuntimeError:
    print("Error importing RPi.GPIO!  This is probably because you need superuser privileges")

# Defining a global device id so it could be increased in sequence
device_id=1001
payload= {'Device_id': device_id}
url = "http://?????"

# Change the state of the pi to desired
def piStatus(content):
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(11, GPIO.OUT)
    payloadDict= json.loads(content)
    light_state = payloadDict["state"]["light"]
    if (light_state == "off"):
        #GPIO.output(channel, state)
        GPIO.output(11, GPIO.LOW)
    elif (light_state == "on"):
        GPIO.output(11, GPIO.HIGH)


if __name__ == '__main__':

    content_type_header     = "application/json"

    global device_id
    headers = {'Content-Type': content_type_header}
# polling raspberry Pi for response :- status , content of the message
    while True:
        status, content = requests.get( url, params = payload, headers=headers)
        #if the status is 200- the raspberry pi is working fine and has sent a positive message
        if status == 200:
            #switching on and off the pi here depending on the content of the response
            piStatus(content)
            print (content)
            device_id += 1
        else:
            print("Device not responding")