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)

Understanding the requirements

Many surfers that are training for surfing competitions want us to build a real-time web-based dashboard with the data provided by an IoT board connected to multiple sensors in the surfboards. Each IoT board will provide the following data:

  • Status: Many wearable wireless sensors embedded in each surfer's wetsuit and other sensors included in the surfboard will provide data and the IoT board will perform a real-time analysis to indicate the status of the surfer
  • Speed: A sensor will measure the surfboard's speed in miles per hour (mph)
  • Altitude: A sensor will measure the surfboard's altitude in feet
  • Water temperature: A sensor located in one of the surfboard's fins will measure the water temperature in degrees Fahrenheit

Third-party software is running on the IoT board and we cannot make changes to the code that publishes the...