Preface

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 perse 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 pe 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.