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Developing IoT Projects with ESP32

You're reading from   Developing IoT Projects with ESP32 Automate your home or business with inexpensive Wi-Fi devices

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Product type Paperback
Published in Sep 2021
Publisher Packt
ISBN-13 9781838641160
Length 474 pages
Edition 1st Edition
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Author (1):
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Vedat Ozan Oner Vedat Ozan Oner
Author Profile Icon Vedat Ozan Oner
Vedat Ozan Oner
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Table of Contents (17) Chapters Close

Preface 1. Section 1: Using ESP32
2. Chapter 1: Getting Started with ESP32 FREE CHAPTER 3. Chapter 2: Talking to the Earth – Sensors and Actuators 4. Chapter 3: Impressive Outputs with Displays 5. Chapter 4: A Deep Dive into the Advanced Features 6. Chapter 5: Practice – Multisensor for Your Room 7. Section 2: Local Network Communication
8. Chapter 6: A Good Old Friend – Wi-Fi 9. Chapter 7: Security First! 10. Chapter 8: I Can Speak BLE 11. Chapter 9: Practice – Making Your Home Smart 12. Section 3: Cloud Communication
13. Chapter 10: No Cloud, No IoT – Cloud Platforms and Services 14. Chapter 11: Connectivity Is Never Enough – Third-Party Integrations 15. Chapter 12: Practice – A Voice-Controlled Smart Fan 16. Other Books You May Enjoy

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...
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