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

Developing low-power applications

ESP32 allows us to develop low-power applications with its power management technology. This provides the following:

  • Low-power clocks
  • Ultra-low power (ULP) coprocessors
  • Real-time controller (RTC) memory to be used in sleep modes
  • Wake-up sources

By using these components on ESP32, we can develop highly efficient battery-powered IoT devices. There are five predefined power modes of ESP32:

  • Active: All components of ESP32 are powered, with no power saving. In all examples up to this point, our devkit was in that mode.
  • Modem-sleep mode: Here, Wi-Fi and Bluetooth are disabled, with no radio communication. For such system-on-chip (SoC) types, radio is on top in terms of power consumption. Therefore, when we turn the radio off, it makes quite a difference in saving power.
  • Light-sleep mode: The high-speed clock and all dependent components stop. The cores and RAM are still powered but not available to use. Low-power...