alesbublik / mqttools

MQTT version 5.0 client and broker using asyncio

MQTT Tools

MQTT tools in Python 3.7 and later.

Both the client and the broker implements MQTT version 5.0 using asyncio.

Client features:

• Subscribe to and publish QoS level 0 topics.
• Broker session resume (or clean start support) for less initial communication.
• Topic aliases for smaller publish packets.
• monitor, subscribe and publish command line commands.

Broker features:

• Subscribe to and publish QoS level 0 topics.
• Session resume (or clean start support) for less initial communication. Session state storage in RAM.
• broker command line command.

Limitations:

There are lots of limitations in both the client and the broker. Here are a few of them:

• QoS level 1 and 2 messages are not supported. A session state storage is required to do so, both in the client and the broker.
• Authentication is not supported.

MQTT version 5.0 specification: https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html

Project homepage: https://github.com/eerimoq/mqttools

Documentation: https://mqttools.readthedocs.io

Installation

pip install mqttools

Examples

There are plenty of examples in the examples folder.

Command line

Subscribe

Connect to given MQTT broker and subscribe to a topic. All received messages are printed to standard output.

$ mqttools subscribe /test/#
Connecting to 'localhost:1883'.

Topic:   /test
Message: 3131
Topic:   /test/mqttools/foo
Message: 626172

Publish

Connect to given MQTT broker and publish a message to a topic.

$ mqttools publish /test/mqttools/foo 626172
Connecting to 'localhost:1883'.

Published 1 message(s) in 0 seconds from 1 concurrent task(s).

Publish multiple messages as quickly as possible with --count to benchmark the client and the broker.

$ mqttools publish --count 100 /test/mqttools/foo
Connecting to 'localhost:1883'.

Published 100 message(s) in 0.39 seconds from 10 concurrent task(s).

Monitor

Connect to given MQTT broker and monitor given topics in a text based user interface.

$ mqttools monitor /test/#

The menu at the bottom of the monitor shows the available commands.

• Quit: Quit the monitor. Ctrl-C can be used as well.
• Play/Pause: Toggle between playing and paused (or running and freezed).

Broker

Start a broker to serve clients.

$ mqttools broker
Starting a broker at 'localhost:1883'.

Scripting

Subscribe

An example connecting to an MQTT broker, subscribing to the topic /test/#, and printing all published messaged.

import asyncio
import mqttools

async def subscriber():
    client = mqttools.Client('localhost', 1883)

    await client.start()
    await client.subscribe('/test/#')

    while True:
        topic, message = await client.messages.get()

        if topic is None:
            print('Broker connection lost!')
            break

        print(f'Topic:   {topic}')
        print(f'Message: {message}')

asyncio.run(subscriber())

Publish

An example connecting to an MQTT broker and publishing the message bar to the topic /test/mqttools/foo.

import asyncio
import mqttools

async def publisher():
    client = mqttools.Client('localhost', 1883)

    await client.start()
    client.publish('/test/mqttools/foo', b'bar')
    await client.stop()

asyncio.run(publisher())