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

Defining rules with IFTTT

IFTTT is an online rule engine for any type of application, including IoT projects. We basically define a trigger (if this) and an action (then that). In this example, we will create a webhook on IFTTT, where our ESP32 device publishes temperature readings, and the IFTTT service will record the incoming readings on a Google spreadsheet. As hardware, we simply connect a DHT11 sensor to GPIO17 of the ESP32 devkit. Let's start by defining a rule on IFTTT first.

Preparing the rule

There are several tasks that we need to do at this stage. Here are the steps:

  1. Create a Google account if you don't have one and navigate to Google Drive at https://drive.google.com.
  2. Create a new folder named ifttt on Google Drive and a spreadsheet in it, temperature_log.
  3. Go to https://ifttt.com and log in. Then, navigate to https://ifttt.com/create to create a new applet. An applet is the IFTTT term for a rule. In the free plan, we can create up to three...