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Hands-On Internet of Things with MQTT
Hands-On Internet of Things with MQTT

Hands-On Internet of Things with MQTT: Build connected IoT devices with Arduino and MQ Telemetry Transport (MQTT)

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Hands-On Internet of Things with MQTT

Basic Architecture of an IoT Prototype

In this chapter, you will be introduced to the basic building blocks of an IoT project. You will briefly get to know various protocols, architectures, and development boards for IoT prototyping. The main purpose of this chapter is to show you what's out there, so you can decide which technologies might be of interest for your next project and give you a head start on further exploration. If you feel overwhelmed by the number of new technologies and options available, don't be. You don't need to understand everything here, but hopefully you will come back later to look up one or more topics if you stumble upon them elsewhere. This chapter neither tries to be a complete reference, nor can it be. It would go completely beyond the scope of this book—which is to teach you how to build IoT prototypes with Arduino and MQTT....

Building blocks of IoT connectivity

One thing all IoT devices have in common is connectivity. In most cases, this means that the device can connect to the internet; in some cases, it might communicate with a local smart hub via another technology such as Bluetooth, which is connected to the internet itself, and sometimes devices from a local network, for example, via radio (see the ZigBee and Thread sections). In each case, there is a communication channel, so devices can either send out data, receive commands, or both.

Having a device that is connected to the internet or another device is much use. It needs to be connected to input and output components. With sensors as input components alone, there are a gazillion possibilities. If you haven't done so already, you should have a look at the sensor category for Sparkfun, one of the best-known shops (https://www.sparkfun...

Understanding protocols and communication

In this section, we will have a look at four common protocols and technologies used for communication between IoT devices. ZigBee and Thread are both technologies that use radio to transmit information. ZigBee has long been the preferred way to transmit information between devices locally (without using the internet, but using radio signals), but is about to be replaced by Thread.

CoAP and MQTT, on the other hand, communicate over the internet. They are both intended to be used with constrained devices and have different areas where each protocol shines. We won't go into too much detail about CoAP and will concentrate on MQTT, starting with Chapter 3, Getting Started with MQTT, instead.

ZigBee

...

Exploring microcontrollers for IoT

There are a multitude of microcontrollers available on the market today that are well suited for IoT prototyping. For simple projects where you just want to read a sensor value and log its value in the cloud, most microcontrollers with internet access will do a great job. In more complex projects, where you need a filesystem and more features than you would typically find on a regular computer, a microcontroller might not be enough, and you may need a development board running a full-grown operating system such as the Raspberry Pi (https://www.raspberrypi.org) or Asus Tinker (https://www.asus.com/de/Single-Board-Computer/Tinker-Board/):

Various development boards

These development boards come with display connectors and USB ports to connect hard drives, webcams, a keyboard, or a mouse to, and are able to run programs written in various...

Summary

In this chapter, you were introduced to a lot of different principles, protocols, and microcontroller boards used in IoT prototyping. We've learned what constitutes the client-server architecture. Next, we looked at how the frontend and backend play together and how machines communicate with one another using APIs. Finally, we learned about the frameworks that use web development technologies such as HTML, CSS, and JavaScript to build desktop and mobile apps, which can communicate with your prototype. We also had a look at various communication methods; devices can transmit information not only over the internet, but also by using radio signals.

One of the most common modules for integrating radio-communication into your project is called XBee, and uses the ZigBee specification. Some devices also ship with Thread support—an upcoming radio-based protocol...

Questions

  1. Name three development boards suitable for IoT prototyping.
  2. Does it matter if a development board runs on 3.3V or 5V?
  3. Name four protocols used in IoT development.
  4. What are over-the-air updates?
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Key benefits

  • Leverage the power of MQTT to build a pet food dispenser, e-ink to-do list, and a productivity cube
  • Learn about technologies like laser cutting, 3D printing, and PCB production for building robust prototypes
  • Explore practical uses cases to gain an in-depth understanding of MQTT

Description

MQ Telemetry Transport (MQTT) is a lightweight messaging protocol for smart devices that can be used to build exciting, highly scalable Internet of Things (IoT) projects. This book will get you started with a quick introduction to the concepts of IoT and MQTT and explain how the latter can help you build your own internet-connected prototypes. As you advance, you’ll gain insights into how microcontrollers communicate, and you'll get to grips with the different messaging protocols and techniques involved. Once you are well-versed with the essential concepts, you’ll be able to put what you’ve learned into practice by building three projects from scratch, including an automatic pet food dispenser and a smart e-ink to-do display. You’ll also discover how to present your own prototypes professionally. In addition to this, you'll learn how to use technologies from third-party web service providers, along with other rapid prototyping technologies, such as laser cutting, 3D printing, and PCB production. By the end of this book, you’ll have gained hands-on experience in using MQTT to build your own IoT prototypes.

Who is this book for?

If you are an IoT developer or enthusiast who wants to start building IoT prototypes using MQTT, this book is for you. Basic knowledge of programming with Arduino will be useful.

What you will learn

  • Explore MQTT programming with Arduino
  • Discover how to make your prototypes talk to each other
  • Send MQTT messages from your smartphone to your prototypes
  • Discover how you can make websites interact with your prototypes
  • Learn about MQTT servers, libraries, and apps
  • Explore tools such as laser cutting and 3D printing in order to build robust prototype cases
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Publication date, Length, Edition, Language, ISBN-13
Publication date : Oct 04, 2019
Length: 350 pages
Edition : 1st
Language : English
ISBN-13 : 9781789341782
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Length: 350 pages
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Language : English
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Table of Contents

9 Chapters
The Internet of Things in a Nutshell Chevron down icon Chevron up icon
Basic Architecture of an IoT Prototype Chevron down icon Chevron up icon
Getting Started with MQTT Chevron down icon Chevron up icon
Setting Up a Lab Environment Chevron down icon Chevron up icon
Building Your Own Automatic Pet Food Dispenser Chevron down icon Chevron up icon
Building a Smart E-Ink To-Do List Chevron down icon Chevron up icon
Building a Smart Productivity Cube, Part 1 Chevron down icon Chevron up icon
Building a Smart Productivity Cube, Part 2 Chevron down icon Chevron up icon
Presenting Your Own Prototype Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.2
(5 Ratings)
5 star 40%
4 star 0%
3 star 20%
2 star 20%
1 star 20%
U.We. May 28, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I bought this book hoping to get a gentle introduction into the world of MQTT with the Arduino platform and wasn't disappointed.What I really like about this book is that some of its chapters serve as a reference on key topics (which I might revisit at a later point) while others are hands-on tutorials to build entertaining projects (e.g. a pet feeder that can be controlled via smartphone).To be honest the projects are not that special (quite simple), but they were easy to follow. I definitely prefer simple (but limited) example projects over too complicated ones that mix up a lot of different technologies, but don't explain what is going on.Another thing that I liked is the MQTT platform being used (Shiftr). This makes it super easy to understand how the MQTT messages are sent around.Would I recommend this book? Definitely!
Amazon Verified review Amazon
etlam May 10, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Die Themen sind gut erklärt (auch für Leute mit wenig Arduino-Erfahrung wie mich). Das Buch reißt einiges an Themen an, etwas knapp teilweise, aber oft werden weiterführende Links zu Youtube oder Artikel zum Weiterstöbern geboten.Es wird recht wenig an Vorwissen vorausgesetzt und man kann dem Inhalt gut folgen. Für Arduino-Profis könnte es etwas langatmig sein, die Zielgruppe sind hier wohl eher Anfänger und Fortgeschrittene.Mit MQTT lässt sich echt eine Menge machen. Hätte nicht gedacht, dass es so einfach ist Nachrichten zwischen mehreren Arduinos, dem Smartphone und Computer hin und her zu schicken.
Amazon Verified review Amazon
Code Wrangler Nov 14, 2019
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
I got a copy of this book to review and while it's OK for the beginner setting up SSL for MQTT is a must for any serious IoT book. How many IoT devices have been hacked as a result of poor security (think security cameras, etc.). I even provide how to configure this with a sample project on my github site.
Amazon Verified review Amazon
John L Nov 15, 2023
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
There is a lot of code in the book. By chapter 4 you’ll find out it’s already outdated. Would not buy until it’s updated.
Amazon Verified review Amazon
Kiran Salunkhe Jul 20, 2020
Full star icon Empty star icon Empty star icon Empty star icon Empty star icon 1
Need book not kindle
Amazon Verified review Amazon
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