MQTT Clients in Python with the paho-mqtt module

It has been a while since my last Python video. so here is a new one!

In this video I will show you how to create MQTT clients in Python with the module paho-mqtt.

We will write a simple MQTT Publisher and Subscriber.

Headless programming - no IDE needed!

[Dasol]

You're the best, I have been struggling on this topic, , you're example is simple and just works, Thank You.

[noweare]

Yes, very simple, python is such a great language.

[FrancoisSchnell]

For mosquitto on windows 10 I had to remove the -v flag to make it work. Thanks for the straight to the point video, very useful :)

[AvielGergel]

first example that perfectly worked for me

[michaelv.]

Hi, do have you already done a pub sub connection with UDP in open62541? If yes, could you share this with us? Regards

[benjaminwe]

hey is there a way to publish a function's result instead of hardcoding it ?

[SA-ojbo]

nice and simple, do you have a simple combination of both in one program because loop_forever is blocking.

[onlinefaxmachine]

My Subscriber one doesn't get the message, it just prints the CTRL+C message and stays there, even when I send a message from my PLC, - (so not only does it not get the message from the publisher code I just copied from you)

[intanaidazulaiqabintiabdul]

3:55-4:05 : what did you click? I didnt get it

[wooperbestpokemon]

I want to find you and kiss you ! After hours of research, you where the one giving me the right solution ^^ !

[DavidMerinoDavidm]

With threading:

client = mqtt.Client()
AttributeError: 'function' object has no attribute 'Client'

[keerthirajan]

import paho.mqtt.client as paho
import sys

def onMessage(client, userdata, msg):
print(msg.topic + ": " + msg.payload.decode())

client = paho.Client()
client.on_message = onMessage

if client.connect("your-host-name", 1883, 60) != 0:
print("Could not connect to MQTT Broker!")
sys.exit(-1)

client.subscribe("Capstone")
client.publish("Capstone", "Happy Birthday")

try:
print("Press CTRL+C to exit...")
client.loop_forever()
except:
print("Disconnecting from broker...")

client.disconnect()

thanks it worked!