Book Image

Developing IoT Projects with ESP32

By : Vedat Ozan Oner
Book Image

Developing IoT Projects with ESP32

By: Vedat Ozan Oner

Overview of this book

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.
Table of Contents (18 chapters)
Section 1: Using ESP32
Section 2: Local Network Communication
Section 3: Cloud Communication

Warming up – Basic I/O with buttons, pots, and LEDs

Fundamentally, a sensor is any device that generates some sort of output when exposed to a phenomenon—say, temperature, humidity, light, vibration, and so on. In our case, this output is an electrical signal. However, it is usually not possible to read this electrical signal directly by connecting to an input pin of a microcontroller, so sensor designers integrate another circuitry, called a signal conditioner, to filter this electrical signal and convert it into a form ready to be processed as input to the microcontroller.

Actuators are on the output side of IoT solutions. They change their state according to an analog or digital signal coming from the microcontroller and generate output to the environment. Some examples are a buzzer to make sound, an LED to emit light, a relay to switch on/off, or a motor to create motion.

The most basic skill with any embedded development is to use general-purpose I/O (GPIO...