Book Image

Hands-On MQTT Programming with Python

By : Gaston C. Hillar
Book Image

Hands-On MQTT Programming with Python

By: Gaston C. Hillar

Overview of this book

<p>MQTT is a lightweight messaging protocol for small sensors and mobile devices. This book explores the features of the latest versions of MQTT for IoT and M2M communications, how to use them with Python 3, and allow you to interact with sensors and actuators using Python.</p> <p>The book begins with the specific vocabulary of MQTT and its working modes, followed by installing a Mosquitto MQTT broker. You will use different utilities and diagrams to understand the most important concepts related to MQTT. You will learn to make all the necessary configuration to work with digital certificates for encrypting all data sent between the MQTT clients and the server. You will also work with the different Quality of Service levels and later analyze and compare their overheads.</p> <p>You will write Python 3.x code to control a vehicle with MQTT messages delivered through encrypted connections (TLS 1.2), and learn how leverage your knowledge of the MQTT protocol to build a solution based on requirements. Towards the end, you will write Python code to use the PubNub cloud-based real-time MQTT provider to monitor a surfing competition.</p> <p>In the end, you will have a solution that was built from scratch by analyzing the requirements and then write Python code that will run on water-proof IoT boards connected to multiple sensors in surfboards.</p>
Table of Contents (9 chapters)


MQTT is the preferred IoT publish-subscribe lightweight messaging protocol. Python is definitely one of the most popular programming languages. It is open source, multiplatform, and you can use it to develop any kind of application. If you develop IoT, web applications, mobile apps, or a combination of these solutions, you must learn how MQTT and its lightweight messaging system works. The combination of Python and MQTT makes it possible to develop powerful applications that communicate with sensors, different devices, and other applications. Of course, it is extremely important to take security into account when working with this protocol.

Most of the time, when you work with complex IoT solutions coded in modern Python 3.6, you will use different IoT boards that might use diverse operating systems. MQTT has its own specific vocabulary and different working modes. Learning MQTT is challenging, because it includes too many abstract concepts that require real-life examples to be easy to understand.

This book will allow you to dive deep in to the latest version of the MQTT protocol: 3.1.1. You will learn to work with the most recent Mosquitto MQTT server, command-line tools, and GUI tools to allow you to understand how everything works with MQTT and the possibilities that this protocol provides for your projects. You will learn security best practices and use them for a Mosquitto MQTT server.
Then, you will work with many real-life examples in Python 3.6. You will control a vehicle, process commands, interact with actuators, and monitor a surf competition by exchanging MQTT messages with the Eclipse Paho MQTT client library. You will also work with a cloud-based, real-time MQTT provider.

You will be able to run the examples on a wide range of modern IoT boards, such as Raspberry Pi 3 Model B+, Qualcomm DragonBoard 410c, BeagleBone Black, MinnowBoard Turbot Quad-Core, LattePanda 2G, and UP Core 4GB. However, any other board that supports Python 3.6 will be able to run the samples.