MQTT.py

"""
Python MQTT Subscription client - No Username/Password
Thomas Varnish (https://github.com/tvarnish), (https://www.instructables.com/member/Tango172)
Written for my Instructable - "How to use MQTT with the Raspberry Pi and ESP8266"
"""
import paho.mqtt.client as mqtt
from db import sensor_Data_Handler
# Don't forget to change the variables for the MQTT broker!



mqtt_topic = "/sunway/level1/toilet1/#"
mqtt_broker_ip = "192.168.0.170"
client = mqtt.Client()

# These functions handle what happens when the MQTT client connects
# to the broker, and what happens then the topic receives a message
def on_connect(client, userdata, flags, rc):
    # rc is the error code returned when connecting to the broker
    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
    
    print "Topic: ", msg.topic + "\nMessage: " + str(msg.payload) 
    sensor_Data_Handler(msg.topic, 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()