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
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Installing the CocoaMQTT client library to create a new iOS app

The CocoaMQTT client library is an open source MQTT version 3.1.1 client library for iOS and macOS, which is written in Swift 3. This client library provides a non-blocking (asynchronous) API. The GitHub page for this client library is .


You can use the CocoaMQTT client library to develop iOS and macOS apps with Swift 3. You will need a Mac computer and Xcode 8 or greater to run the example.

The easiest way to create a new Xcode project that uses this API is to use the CocoaPods dependency manager for Swift. In case you don't work with CocoaPods, you can easily install it following the detailed instructions included on its main web page, that is, .

Once you have CocoaPods installed in macOS, you are ready to create a simple iOS app, based on the Single View Application template with Xcode.

Navigate to File | New | Project... in Xcode. Click iOS at the top of the Choose...