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)
1
Section 1: Using ESP32
7
Section 2: Local Network Communication
12
Section 3: Cloud Communication

Solution architecture

In the solution architecture, we need to discuss two different parts: the firmware and the cloud backend. Let's talk about the firmware first.

The device firmware

The following diagram shows the main components of the firmware:

Figure 12.1 – Firmware components

The GPIO controller will configure and drive the GPIO pins of ESP32. There are four pins to be used as inputs and three other pins as outputs. The input pins will read from the tactile buttons (or the speed buttons of the fan in the second prototype) and the output pins will control the relays. When the stop button is pressed, all relays will switch off. If any one of the speed buttons is pressed, the corresponding relay will switch on. The GPIO controller also communicates with the AWS module to send the button state information and to receive voice commands from Alexa.

The Wi-Fi communication module connects to the local Wi-Fi network as specified by the...