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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 with lwIP

lightweight IP (lwIP) is an open source TCP/IP stack for embedded systems and ESP-IDF has imported it into the framework. The idea behind lwIP is to create a small-footprint TCP/IP protocol suite that resource-constrained embedded systems can use to connect to IP-based networks and leverage the services in a network. lwIP is one of the most popular TCP/IP stacks targeting embedded systems on the market.

Basically, the ESP-IDF port supports the following APIs of lwIP:

  • Berkeley Software Distribution (BSD) sockets API for TCP and UDP connections
  • Dynamic Host Configuration Protocol (DHCP) for dynamic IP addressing
  • Simple Network Time Protocol (SNTP) as a time protocol
  • Multicast Domain Name System (mDNS) for host name resolution and service information
  • Internet Control Message Protocol (ICMP) for network monitoring and diagnostics

Actually, we have already used some of these behind the scenes in our previous examples. In the STA mode...

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