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

Organic Light-Emitting Diode Displays (OLEDs)

Organic Light-Emitting Diode (OLED) displays have a number of advantages over LCDs, most notably the following:

  • Lower energy usage since there is no need for a backlight.
  • A fast response time.
  • Integrated I2C communication.
  • It is thinner in depth.

Those advantages make it a strong option in many products. However, it is a relatively new technology, so prices are a bit higher. You can see an image of an OLED display in the following figure:

Figure 3.4 – 1.3" OLED with 128x64 pixels

This time, we will develop the same temperature application with an OLED display. The hardware components that we need are as follows:

  • A 1.3" OLED display with an SH1106 driver chip (I have one from AZ-Delivery)
  • DHT11

The driver chip supports 3.3 V logic level and we can directly interface it with ESP32. Moreover, we don't require any external power source, thanks to its...