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Developing IoT Projects with ESP32
Developing IoT Projects with ESP32

Developing IoT Projects with ESP32: Unlock the full Potential of ESP32 in IoT development to create production-grade smart devices , Second Edition

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Developing IoT Projects with ESP32

Understanding the Development Tools

After getting a quick overview of Espressif’s ESP32 technology in the first chapter, we are now ready to start on some development with the real hardware. For this, we need to understand the basics and how to use the available tools for the job. It is a learning process and takes some time; however, we’ll have acquired the fundamental knowledge and gained hands-on experience to develop actual applications on ESP32 by the end of the chapter.

In this chapter, we’re going to install the development environment on our machines and use our development kits to run and debug the applications. The topics covered are as follows:

  • ESP-IDF
  • PlatformIO
  • FreeRTOS
  • Debugging
  • Unit testing

Let’s start by looking into the development framework by Espressif Systems, ESP-IDF.

Technical requirements

Throughout the book, we’re going to use Visual Studio Code (VSCode) as our Integrated Development Environment (IDE). If you don’t have it, you can find it here: https://code.visualstudio.com/. VSCode is updated monthly, but its version is 1.77.3 as of writing this book.

The main development framework that we will use in this chapter and in the book is ESP-IDF v4.4.4. It is available on GitHub here: https://github.com/espressif/esp-idf. If you are a Windows user, you can download the installer from this link as another installation option: https://dl.espressif.com/dl/esp-idf/.

ESP-IDF requires Python 3 to be installed on the development machine. We will also need Python in some of the examples. The Python version that is used is 3.10.11.

The examples in the book are developed on Ubuntu 22.04.2 LTS (Linux 5.15.0-71-generic x86_64). However, they compile regardless of the development platform after the installation of ESP-IDF on the development machine.

For hardware, we need both devkits in this chapter, ESP32-C3-DevKitM-1 and ESP32-S3-Box-Lite.

The source code in the examples is located in the repository found at this link: https://github.com/PacktPublishing/Developing-IoT-Projects-with-ESP32-2nd-edition/tree/main/ch2

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Key benefits

  • Build IoT projects from scratch using ESP32
  • Customize solutions, take them to cloud, visualize real-time data, implement security features
  • Practice using a variety of hands-on projects such as an audio player, smart home, and more

Description

ESP32, a low-cost and energy-efficient system-on-a-chip microcontroller, has become the backbone of numerous WiFi devices, fueling IoT innovation. This book offers a holistic approach to building an IoT system from the ground up, ensuring secure data communication from sensors to cloud platforms, empowering you to create production-grade IoT solutions using the ESP32 SoC. Starting with IoT essentials supported by real-world use cases, this book takes you through the entire process of constructing an IoT device using ESP32. Each chapter introduces new dimensions to your IoT applications, covering sensor communication, the integration of prominent IoT libraries like LittleFS and LVGL, connectivity options via WiFi, security measures, cloud integration, and the visualization of real-time data using Grafana. Furthermore, a dedicated section explores AI/ML for embedded systems, guiding you through building and running ML applications with tinyML and ESP32-S3 to create state-of-the-art embedded products. This book adopts a hands-on approach, ensuring you can start building IoT solutions right from the beginning. Towards the end of the book, you'll tackle a full-scale Smart Home project, applying all the techniques you've learned in real-time. Embark on your journey to build secure, production-grade IoT systems with ESP32 today!

Who is this book for?

If you are an embedded software developer, an IoT software architect or developer, a technologist, or anyone who wants to learn how to use ESP32 and its applications, this book is for you. A basic understanding of embedded systems, programming, networking, and cloud computing concepts is necessary to get started with the book.

What you will learn

  • Explore ESP32 with IDE and debugging tools for effective IoT creation
  • Drive GPIO, I2C, multimedia, and storage for seamless integration of external devices
  • Utilize handy IoT libraries to enhance your ESP32 projects
  • Manage WiFi like a pro with STA & AP modes, provisioning, and ESP Rainmaker framework features
  • Ensure robust IoT security with secure boot and OTA firmware updates
  • Harness AWS IoT for data handling and achieve stunning visualization using Grafana
  • Enhance your projects with voice capabilities using ESP AFE and Speech Recognition
  • Innovate with tinyML on ESP32-S3 and the Edge Impulse platform
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Length: 578 pages
Edition : 2nd
Language : English
ISBN-13 : 9781803237688
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Table of Contents

14 Chapters
Introduction to IoT development and the ESP32 platform Chevron down icon Chevron up icon
Understanding the Development Tools Chevron down icon Chevron up icon
Using ESP32 Peripherals Chevron down icon Chevron up icon
Employing Third-Party Libraries in ESP32 Projects Chevron down icon Chevron up icon
Project – Audio Player Chevron down icon Chevron up icon
Using Wi-Fi Communication for Connectivity Chevron down icon Chevron up icon
ESP32 Security Features for Production-Grade Devices Chevron down icon Chevron up icon
Connecting to Cloud Platforms and Using Services Chevron down icon Chevron up icon
Project – Smart Home Chevron down icon Chevron up icon
Machine Learning with ESP32 Chevron down icon Chevron up icon
Developing on Edge Impulse Chevron down icon Chevron up icon
Project – Baby Monitor Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Top Reviews
Rating distribution
Full star icon Full star icon Full star icon Full star icon Half star icon 4.3
(46 Ratings)
5 star 67.4%
4 star 17.4%
3 star 4.3%
2 star 4.3%
1 star 6.5%
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sgmustadio Feb 24, 2024
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Full disclosure: I was given a copy of the book to write a review.The ESP32 is a fan favorite among engineers, makers, and tinkerers looking to create various IoT projects. For the most part, I stick with the Arduino IDE and libraries when working with the ESP32. However, the non-Arduino option for development, ESP-IDF, is a wonderful suite of tools built to work with nearly any editor. If you are looking to develop professional, robust IoT projects with the ESP32, you will likely gravitate toward ESP-IDF.“Developing IoT Projects with ESP32” starts with a brief overview of the ESP32 hardware and ESP-IDF. In reality, the author assumes you have some working knowledge and experience with the ESP32, which is not a bad thing. This is not a book for beginners. Even though a “getting started” tutorial is provided for ESP-IDF, I would highly recommend using other online resources for setting up and using ESP-IDF. The official Espressif documentation covers more details and is plenty easy to follow.However, the book really shines after you have a basic grasp of ESP-IDF. It covers many topics required for developing professional projects that are sorely lacking in most online content. For example, it goes over the basics of FreeRTOS (the ESP-IDF flavor), step-through debugging, advanced libraries, REST, MQTT, security, IoT cloud services, and machine learning. If I were considering using the ESP32 for developing a professional project, this is the book I would want as my companion and reference guide.The biggest drawback is the lack of Bluetooth content. This chapter was apparently present in the first edition but sadly removed for this version. Even if WiFi is more popular, I think dismissing Bluetooth is a mistake, as plenty of developers still want to use low-energy, wireless connections to various devices (such as smartphones). The addition of machine learning chapters is welcome, but having both Bluetooth and ML would have been better.Additionally, the book switches between PlatformIO and native ESP-IDF tooling for installing third-party libraries. I recognize that PlatformIO is very popular, but I have generally struggled with it. My preference would be a focus on using the ESP-IDF and CMake for installing/linking such libraries, as that is a more portable approach.While the book is best used as a reference guide, it contains several projects that you can build to further grasp the concepts and tools: an audio player, a smart home plug, and a baby monitor. I highly recommend the book to anyone who wants to move beyond Arduino and level up their IoT skills using the ESP32.
Amazon Verified review Amazon
Dan G Jan 19, 2024
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book meticulously steps through the necessary tools and coding for building real IoT projects with the ESP32. I honestly can't think of a better book to learn and expand your knowledge on embedded and IoT. The examples are practical and provide a wide spectrum on the details of working with the internals, peripherals, cloud services, and user interfaces of a working solution. I really appreciate the syntax highlighting of the code samples. There is a lot packed into this book and it is well worth every step to follow along. Great job putting this second edition together with all new material.
Amazon Verified review Amazon
mperez Nov 30, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Disclaimer: I was given an early review copy of this book and did not purchase it.TLDR: Loved the book, definitely keeping it nearby while developing IoT projects This book does a fantastic job on many fronts:- succinctly highlighting details about the ESP32 family- thorough explanations on build setup (a major pain in many projects)- thorough code snippets that include full configuration parameters, making it a great reference- introducing first and third-party libraries that would cover a majority of needs (file systems, json, etc).- demonstrating projects of different scales, increasing the scope in large but exciting steps.- including sections on cloud integrations and ML- emphasizing different aspects of security in well-placed chunksComments:- I was really hoping to see sections involving bluetooth or LoRa- I like that the book used devices with both Xtensa and RISC-V architecturesIf I were to characterize the readers that would benefit most from this book, it would be Advanced Beginners in embedded projects. Programmers from other domains that are interested in IoT, engineering students, hobbyists that have already dabbled in microcontrollers, anyone in the "Ok, I can flash firmware and blink an LED, what's next?" phase or above.
Amazon Verified review Amazon
Chris Richards Jan 30, 2024
Full star icon Full star icon Full star icon Full star icon Full star icon 5
When I started my journey with the ESP32 the first edition of this book was the go to reference for everyone. Everywhere I looked to find guidance on how to begin with this awesome platform I was met with a clear "go read Vedat's book". The new second edition has improved on that reverential text in many ways. The examples are relevant, clear, and concise. The demonstration hardware was out of stock while I was reviewing the book but comparable kits are all over the place; if you know what to look for.And that is the rub, like the first edition before it this book assumes a level of familiarity with coding and microcontrollers you won't likely have if it is your first time. And while the first edition dominated the landscape because there were no beginner friendly alternatives, now we have a plethora of choices for all levels of experience. So, who is this book for?If you are just getting started in microcontrollers with no or very little coding experience, I suggest you start with Arduino. There are many websites and books devoted to you.If you are already comfortable in embedded C/C++ this book may be interesting but honestly you will probably get more value out of the Espressif IDF online documentation, it is fantastic.For C++ developers who have never played with a microcontroller before this book is exactly where you should begin. You will get elegant step by step guidance through the basic applications of the ESP32 using modern code structures.If you are not comfortable with C++, this book could be great as your first experience in microcontrollers as long as you take the time to work through the additional reference texts provided by the author. It will be a lot of work, but very fulfilling when you see the device light up for the first time. It is a magical feeling.Over all, highly recommended, as long as it is to the right audience.
Amazon Verified review Amazon
Brian Tol Dec 01, 2023
Full star icon Full star icon Full star icon Full star icon Full star icon 5
I found "Developing Products with the ESP32" to be a valuable resource. The book provides a well-rounded introduction to the ESP32 line of chips, emphasizing their security features, which is crucial in the IoT space.The author's detailed overview of hardware debugging and unit testing is especially beneficial, given the complexity often encountered in these areas. Additionally, the solid coverage of Real-Time Operating Systems (RTOSes), with a focus on FreeRTOS, complements the technical depth of the book. The book assumes a basic level of electronics knowledge and a solid programming background.For developers delving into embedded systems, the book covers the essentials: storage, GPIO, GUI, and WiFi, alongside a useful introduction to MQTT and REST protocols. While it doesn't dive deep into other IoT protocols and GraphQL, this choice by the author streamlines the content without compromising its utility.The inclusion of discussions on the Rainmaker IoT Platform and AWS IoT Core, with insights into device shadows and time series data, is particularly pertinent. The book also touches upon AI and TinyML, bringing an added dimension to IoT development.What I appreciate most is how the author ties these diverse topics together with practical smart-home projects, offering plenty of examples and clear explanations. It's worth noting, though, that the book is lighter on protocols like BLE, LoRa, and NB-IoT. While these are conscious choices by the author, readers should be aware of the need to seek additional resources for these areas.Overall, it's an excellent introduction to the ESP32 and basic IoT development, but it's not a beginner's guide. For anyone looking to enter the IoT domain, this book provides a solid foundation, although it doesn't delve into the finer details of production-grade systems. Highly recommended for those wanting to get up to speed with the Espressif ecosystem and the essentials of IoT development.
Amazon Verified review Amazon
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