# MQTT python

###### tags: `python` `IoT` `MQTT`

## Free MQTT Broker



## Download paho MQTT library

pip install paho-mqtt

## Publish Client

### Inside temperature

import paho.mqtt.client as mqtt
from random import randrange, uniform
import time

#Connect to broker and create the client
mqttBroker ="mqtt.eclipseprojects.io"
client = mqtt.Client("Temperature_inside")
client.connect(mqttBroker)

while True:
    randNumber=uniform(25.0,26.0)                 #Definde a rand of the range
    client.publish("temperature",randNumber)      #Difind the topic 
    print("Inside temperature" + str(randNumber) + "to topic: temperature")  # print waht action happen in public client 
    time.sleep(1)

Result


### Outside temperature

import paho.mqtt.client as mqtt
from random import randrange, uniform
import time

#Connect to broker and create the client
mqttBroker ="mqtt.eclipseprojects.io"
client = mqtt.Client("Temperature_outside")
client.connect(mqttBroker)

while True:
    randNumber=uniform(30.0,31.0)
    client.publish("temperature",randNumber)
    print("Outside temerature " + str(randNumber) + "to topic: temperature")
    time.sleep(1)

Result

## Subscribe client

### Smartphone

import paho.mqtt.client as mqtt
import time

#Connect to broker and create the client
mqttBroker ="mqtt.eclipseprojects.io"
client = mqtt.Client("Smartphone")
client.connect(mqttBroker)


def callBackMessage(client, userdata, message):
    print("Received message:" , str(message.payload.decode("utf-8")))

client.loop_start()

client.subscribe('temperature')
client.on_message = callBackMessage

time.sleep(30)
client.loop_end()

Result