You're reading from Raspberry Pi and MQTT Essentials A complete guide to helping you build innovative full-scale prototype projects using Raspberry Pi and MQTT protocol

Product type Paperback

Published in Sep 2022

Publisher Packt

ISBN-13 9781803244488

Length 272 pages

Edition 1st Edition

Tools

MQTT

Concepts

IoT Development

Author (1):

Dhairya Parikh

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Table of Contents (14) Chapters

Preface

1. Part 1:Covering the Basics

2. Chapter 1: Introduction to Raspberry Pi and MQTT FREE CHAPTER

3. Chapter 2: MQTT in Detail

4. Chapter 3: Introduction to ESP Development Boards

5. Chapter 4: Node-RED on Raspberry Pi

6. Part 2: Practical Implementation – Building Two Full-Scale Projects

7. Chapter 5: Major Project 1: IoT Weather Station

8. Chapter 6: Major Project 2: Smart Home Control Relay System

9. Part 3: How to Take Things Further – What Next?

10. Chapter 7: Taking Your MQTT Broker Global

11. Chapter 8: Project Prototype to Product – How?

12. Index

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Major Project 2: Smart Home Control Relay System

In this chapter, we will be creating yet another full-scale project using the concepts we learned in the initial chapters of this book. The main objective of this chapter is to create a smart home device for controlling wall switches using the Node-RED dashboard hosted on the Raspberry Pi. The device will be based on the popular ESP32 development board.

This chapter is a step-by-step tutorial to build this project from scratch. We will be covering the following aspects of the project:

Hardware requirements and setup
Code explanation
Raspberry Pi setup
Project enhancements

For this project, we will be preparing a PCB instead of creating the circuit on a breadboard for a more finished and professional look. The final hardware is shown in Figure 6.1.

Figure 6.1 – Smart home control relay system (ESP32)

In this figure, we can see that the hardware has four relays, and the functionality...