Lightsubscriber.py

import paho.mqtt.client as mqtt
from random import randint
from datetime import date, datetime
import time
from time import strftime

def on_log(client, userdata, level, buf):      #log the subscriber considering the buffer
    print("Log: ",buf)

def on_publish(client, userdata, mid): 
    print("Data published to broker")   #print when data is successfully sent
    print("publish mid:", mid, "\n")       #print the message id of the publisher

# The callback for when the client receives a CONNACK response from the server.
def on_connect(client, userdata, flags, rc):
    if rc == 0:
        client.connected_flag = True           #set the flag to true once connected
        print("Connected with result code "+str(rc)) #check to know if we are connected to broker
        print("Status[ON, OFF]")
    else:
        print("Bad connection, returned code= ", rc)  #if connection failed
        print("client disconnected ok")

def on_disconnect(client, userdata, rc):
    print("Client disconnected")       
    client.connected_flag = False     #set flag to false if disconnected
    time.sleep(1)                   #wait before retrying connection
  
client1 = mqtt.Client(mqtt.CallbackAPIVersion.VERSION1, "motion-detector light sensor")  # Create an MQTT client object
client1.connect("broker.hivemq.com", 1883)
client1.on_publish = on_publish
client1.on_log = on_log                   #set log function to print the messages
#client1.on_message = on_message         #assign the on_messsage function
client1.on_connect = on_connect       #assign the on_connect function to the callback attribute
client1.on_disconnect = on_disconnect

while True:
    client1.loop_start()
    result = randint(0,1)
    if (result == 1):
        lightStatus = "GREEN" #signify there is someone or a movement in the room
    else:
        lightStatus = "RED"   #Signify no one or movement seen in the room
    #print(status)
    client1.publish("House/Light", lightStatus)
    time.sleep(2)               #wait for 2 seconds and then change the state of bulb