Developing IoT Projects with ESP32: Automate your home or business with inexpensive Wi-Fi devices
- Length: 470 pages
- Edition: 1
- Language: English
- Publisher: Packt Publishing
- Publication Date: 2021-09-13
- ISBN-10: 1838641165
- ISBN-13: 9781838641160
- Sales Rank: #956265 (See Top 100 Books)
Master the technique of using ESP32 as an edge device in any IoT application where wireless communication can make life easier
Key Features
- Gain practical experience in working with ESP32
- Learn to interface various electronic devices such as sensors, integrated circuits (ICs), and displays
- Apply your knowledge to build real-world automation projects
Book Description
Developing IoT Projects with ESP32 provides end-to-end coverage of secure data communication techniques from sensors to cloud platforms that will help you to develop production-grade IoT solutions by using the ESP32 SoC. You’ll learn how to employ ESP32 in your IoT projects by interfacing with different sensors and actuators using different types of serial protocols.
This book will show you how some projects require immediate output for end-users, and cover different display technologies as well as examples of driving different types of displays. The book features a dedicated chapter on cybersecurity packed with hands-on examples. As you progress, you’ll get to grips with BLE technologies and BLE mesh networking and work on a complete smart home project where all nodes communicate over a BLE mesh. Later chapters will show you how IoT requires cloud connectivity most of the time and remote access to smart devices. You’ll also see how cloud platforms and third-party integrations enable endless possibilities for your end-users, such as insights with big data analytics and predictive maintenance to minimize costs.
By the end of this book, you’ll have developed the skills you need to start using ESP32 in your next wireless IoT project and meet the project’s requirements by building effective, efficient, and secure solutions.
What you will learn
- Explore advanced use cases like UART communication, sound and camera features, low-energy scenarios, and scheduling with an RTOS
- Add different types of displays in your projects where immediate output to users is required
- Connect to Wi-Fi and Bluetooth for local network communication
- Connect cloud platforms through different IoT messaging protocols
- Integrate ESP32 with third-party services such as voice assistants and IFTTT
- Discover best practices for implementing IoT security features in a production-grade solution
Who this book is 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.
Table of Contents
- Getting started with ESP32
- Talking to the world: sensors and actuators
- Impressive outputs with displays
- Deep dive into the advanced features
- Practice – Multisensor for your room
- Good old friend: WiFi
- Security first!
- I can speak BLE
- Practice – Making your home smart
- No cloud no IoT: Cloud platforms and services
- Connectivity is never enough: 3rd party integrations
- Practice – Voice-controlled smart fan
Developing IoT Projects with ESP32
Contributors
About the author
About the reviewers
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Code in Action
Download the color images
Conventions used
Get in touch
Share Your Thoughts
Section 1: Using ESP32
Chapter 1: Getting Started with ESP32
Technical requirements
IoT as an emerging technology
What is IoT?
Where do we apply IoT?
AI/ML on the edge
Energy harvesting
Nanorobotics
Understanding the basic structure of IoT solutions
IoT security
Introduction to ESP32 platform and modules
Why ESP32?
ESP32 features
Development platforms and frameworks
RTOS options
Summary
Chapter 2: Talking to the Earth – Sensors and Actuators
Technical requirements
Toolchain installation, programming, and debugging ESP32
PlatformIO installation
The first program
Debugging the application
Warming up – Basic I/O with buttons, pots, and LEDs
Example: Turning an LED on/off by using a button
Example – LED dimmer
Working with sensors
Reading ambient temperature and humidity with DHT11
Using DS18B20 as temperature sensor
Sensing light with TSL2561
Employing BME280 in your project
Working with actuators
Using an electromechanical relay to control switching
Running a stepper motor
Summary
Questions
Chapter 3: Impressive Outputs with Displays
Technical requirements
Liquid Crystal Displays (LCDs)
Organic Light-Emitting Diode Displays (OLEDs)
Thin Film Transistor Displays (TFTs)
Using FreeRTOS
Counting touch sensor
Using several sensors as producers
Summary
Questions
Chapter 4: A Deep Dive into the Advanced Features
Technical requirements
Communicating over UART
Adding a speaker with I²S
Uploading a sound file to the flash memory
Playing the sound file
Developing a camera application
Preparing the development environment for ESP32-CAM
Flashing and monitoring ESP32-CAM
Developing the project
Developing low-power applications
Waking up from light sleep
Using the ULP coprocessor in deep sleep
Summary
Questions
Chapter 5: Practice – Multisensor for Your Room
Technical requirements
Feature list of the multisensor
Solution architecture
Implementation
Sensor subsystem
User interaction subsystem
Power management subsystem
Main application
Summary
Section 2: Local Network Communication
Chapter 6: A Good Old Friend – Wi-Fi
Technical requirements
Using Wi-Fi
STA mode
AP mode
Developing with lwIP
Sensor service over mDNS
Digital clock with SNTP
Summary
Questions
Further reading
Chapter 7: Security First!
Technical requirements
Secure boot and over-the-air (OTA) updates
Secure boot v1
Secure boot v2
Updating OTA
Securing communication with TLS/DTLS
Integrating with secure elements
Summary
Questions
Further reading
Chapter 8: I Can Speak BLE
Technical requirements
Understanding BLE basics
The Generic Access Profile
The Attribute Profile
The Generic Attribute Profile
The Security Manager Protocol
Developing a BLE beacon
Developing a GATT server
Setting up a BLE Mesh network
Summary
Questions
Further reading
Chapter 9: Practice – Making Your Home Smart
Technical requirements
Feature list
Solution architecture
Light sensor
Switch
Gateway
Implementation
Light sensor
Switch
Gateway
Testing
Summary
Section 3: Cloud Communication
Chapter 10: No Cloud, No IoT – Cloud Platforms and Services
Technical requirements
IoT protocols with ESP32
MQTT
CoAP
WebSocket
Understanding cloud IoT platforms
AWS IoT
Azure IoT
Google IoT Core
Alibaba Cloud IoT Platform (Aliyun IoT)
Developing on AWS IoT
Summary
Questions
Chapter 11: Connectivity Is Never Enough – Third-Party Integrations
Technical requirements
How it works
Amazon Alexa concepts
Integrating with Amazon Alexa
Creating the smart home skill
Creating the Lambda function
Linking an Amazon account to the skill
Enabling the skill
Creating a thing
Developing the Lambda function
Testing the skill
Developing the firmware
Troubleshooting
Defining rules with IFTTT
Preparing the rule
Developing the firmware
Summary
Questions
Further reading
Chapter 12: Practice – A Voice-Controlled Smart Fan
Technical requirements
Feature list of the smart fan
Solution architecture
The device firmware
The cloud architecture
Implementation
Creating the skill
Creating the Lambda function
Account linking
Creating the thing
Developing the Lambda function
Developing the firmware
What is next?
Summary
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