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Developing IoT Projects with ESP32

Developing IoT Projects with ESP32

By : Vedat Ozan Oner
4.3 (11)
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Developing IoT Projects with ESP32

Developing IoT Projects with ESP32

4.3 (11)
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 (17 chapters)
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1
Section 1: Using ESP32
7
Section 2: Local Network Communication
12
Section 3: Cloud Communication

Working with sensors

To relate to the physical world, we use sensors. For example, a button or a pot are sensors, but when we need to measure different phenomena—let's say temperature—we can use a temperature sensor with a more advanced communication interface rather than a simple GPIO or ADC interface. In this section, we'll cover plenty of sensors with different communication interfaces to get familiar with those interfaces. Let's start with a popular temperature and humidity sensor, DHT11.

Reading ambient temperature and humidity with DHT11

DHT11 is a basic temperature and humidity sensor with a very low price tag. The operational voltage is between 3 and 5 V, so we can use it by directly connecting to our ESP32 without a need for a level shifter. The temperature range is 0-50°C, with ±2°C accuracy and 1°C resolution. We can also use it to measure humidity between 20% and 90% with ±5% accuracy. It already comes calibrated...

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