Book Image

MQTT Essentials - A Lightweight IoT Protocol

5 (1)
Book Image

MQTT Essentials - A Lightweight IoT Protocol

5 (1)

Overview of this book

This step-by-step guide will help you gain a deep understanding of the lightweight MQTT protocol. We’ll begin with the specific vocabulary of MQTT and its working modes, followed by installing a Mosquitto MQTT broker. Then, you will use best practices to secure the MQTT Mosquitto broker to ensure that only authorized clients are able to publish and receive messages. Once you have secured the broker with the appropriate configuration, you will develop a solution that controls a drone with Python. Further on, you will use Python on a Raspberry Pi 3 board to process commands and Python on Intel Boards (Joule, Edison and Galileo). You will then connect to the MQTT broker, subscribe to topics, send messages, and receive messages in Python. You will also develop a solution that interacts with sensors in Java by working with MQTT messages. Moving forward, you will work with an asynchronous API with callbacks to make the sensors interact with MQTT messages. Following the same process, you will develop an iOS app with Swift 3, build a website that uses WebSockets to connect to the MQTT broker, and control home automation devices with HTML5, JavaScript code, Node.js and MQTT messages
Table of Contents (16 chapters)
MQTT Essentials - A Lightweight IoT Protocol
About the Author
About the Reviewer
Customer Feedback

Installing the Eclipse Paho Java Client

The Eclipse Paho project provides an open source client implementation of MQTT. The project includes a Java client, also known as the Paho Java Client or Eclipse Paho Java client.

The following is the web page for the Eclipse Paho project:

The following is the web page for the Eclipse Paho Java client:


We can use the Eclipse Paho Java client in many modern IoT boards that support Java. For example, we can install and use this client on Raspberry Pi boards, such as Raspberry Pi 3, and on Intel IoT boards, such as the Intel Joule, Intel Edison, and Intel Galileo. We just need to make sure that Java is installed. You can use your development computer to run the examples or any of the mentioned boards. You will need Java 8 or a later version installed on your development computer.

This Java client provides both a blocking (synchronous) and a non-blocking (asynchronous) API. The blocking...