Wiznet makers

👤 AUTHOR / PLATFORM CONTEXT

This project is published on OpenELAB, a platform focused on hands-on tutorials and practical embedded system learning using modern maker hardware.

The content targets developers and engineers who want to quickly prototype network-connected embedded applications using modular hardware platforms such as M5Stack.

🎯 PROJECT DESCRIPTION

This UCC demonstrates how to build a simple embedded web server using:

• M5Stack Atom S3 (ESP32-S3 based controller)
• Atomic PoE (W5500) Ethernet module

The project shows how a compact ESP32-S3 device can serve web pages over wired Ethernet, enabling reliable access to device status and controls through a standard web browser.

Rather than focusing on complex frameworks, the tutorial emphasizes clarity, simplicity, and practical Ethernet usage.

🧩 HARDWARE COMPONENTS

🔧 Core Hardware

• M5Stack Atom S3
  • ESP32-S3 MCU
  • Compact form factor
  • USB-C programming interface
• Atomic PoE Ethernet Module
  • WIZnet W5500 Ethernet controller
  • SPI interface
  • PoE support for simplified power + data delivery

🧩SOFTWARE 

• Arduino IDE (with ESP32 board support)
• M5Stack library for ATOM S3

🌐 Networking

• Wired Ethernet (TCP/IP)
• Embedded HTTP web server

🧠 SYSTEM OVERVIEW

[Web Browser (PC / Mobile)]
            ↓
        Ethernet
            ↓
   WIZnet W5500 (Atomic PoE)
            ↓  SPI
     ESP32-S3 (Atom S3)
            ↓
     Web Server Logic

The ESP32-S3 handles application logic and HTTP responses,
while the W5500 offloads all TCP/IP processing, providing a stable Ethernet connection.

🧠 REFERENCE TO ORIGINAL

🧠 ENGINEERING – FOCUSED INSIGHTS

✔ Why W5500 Matters in This Project

Although the ESP32-S3 includes Wi-Fi, this project deliberately uses wired Ethernet to achieve:

• predictable latency
• stable connectivity
• independence from Wi-Fi quality or access points

The W5500’s hardware TCP/IP stack significantly reduces firmware complexity and CPU load, making it easier to implement a reliable web server on a small MCU.

✔ PoE for Clean Embedded Deployment

By using the Atomic PoE module, the system can receive:

• power
• network connectivity

over a single Ethernet cable—an important advantage for:

• wall-mounted devices
• industrial panels
• remote or hard-to-access installations

🧪 USE CASES

• Embedded device configuration pages
• Network-enabled sensors and controllers
• Industrial or building automation panels
• Educational Ethernet + HTTP examples
• IoT edge devices requiring stable wired access

📘 KEY TAKEAWAYS

• Demonstrates ESP32-S3 + W5500 as a practical Ethernet web server platform
• Shows how PoE simplifies real-world deployment
• Highlights the value of hardware TCP/IP offloading in small embedded systems
• Provides a clear, reproducible starting point for Ethernet-based IoT devices

🏷 TAGS

#M5Stack #AtomS3 #W5500  #EthernetWebServer #PoE #EmbeddedHTTP #IoTNetworking
#ESP32S3