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

Understanding BLE basics

The fastest track to understand how BLE works is to look at its architecture diagram:

Figure 8.1 – Bluetooth technology stack

The architecture contains two major sections – Controller and Host. The controller section manages the radio and the host section implements the stack providing an interface for applications. Therefore, it is possible to design a device with an application processor and a Bluetooth network co-processor separately or to use a single system-on-chip (SoC) having the Bluetooth radio embedded in it. ESP32 falls into the second category.

On the host side, ESP32 uses Bluedroid as the default Bluetooth host. The Bluedroid stack is an open source implementation of the Bluetooth standard for Android devices imported into ESP-IDF. Let's have a quick look at the host-level functionality that we need while developing applications.

The Generic Access Profile

Generic Access Profile (GAP) defines...