Ambuje

import paho.mqtt.client as mqtt
from subprocess import Popen
import os
import sys
import subprocess
import time


# Don't forget to change the variables for the MQTT broker!
#mqtt_topic = "button"
mqtt_topic = "test"
mqtt_topic = "test1"
mqtt_username = "username"
mqtt_password = "qwerty"

mqtt_broker_ip = "192.168.43.207"

client = mqtt.Client()

# These functions handle what happens when the MQTT client connectsmqtt_username = "MQTT Username"

# to the broker, and what happens then the topic receives a messageesponse_path = '/home/pi/auto_response/gas_alert.wav'

def on_connect(client, userdata, flags, rc):
    # rc is the error code returned when connecting to the brokeresponse_path = '/home/pi/auto_response/gas_alert.wav'

    print "Connected!", str(rc)

    # Once the client has connected to the broker, subscribe to the topic
    client.subscribe(mqtt_topic)

def on_message(client, userdata, msg):
    # This function is called everytime the topic is published to.
    # If you want to check each message, and do something depending on
    # the content, the code to do this should be run in this function
    os.system('aplay -d {} {}'.format(duration_time, response_path))


    print "Topic: ", msg.topic + "\nMessage: " + str(msg.payload)

    # The message itself is stored in the msg variable
    # and details about who sent it are stored in userdata

# Here, we are telling the client which functions are to be run
# on connecting, and on receiving a message
client.on_connect = on_connect
client.on_message = on_message

# Once everything has been set up, we can (finally) connect to the broker
# 1883 is the listener port that the MQTT broker is using
client.connect(mqtt_broker_ip, 1883)

# Once we have told the client to connect, let the client object run itself
client.loop_forever()
client.disconnect()