[Re]LilyGo-W5500-Lite-WoL

COMPONENTS

PROJECT DESCRIPTION

✅ Project Overview: Wake-on-LAN IoT Dongle Based on W5500

This project utilizes the LILYGO T-Lite W5500 development board to implement a Wake-on-LAN (WoL) IoT dongle. Users can remotely power on a PC by sending Magic Packets via a web-based configuration interface, where they can enter Wi-Fi and Ethernet settings, as well as the MAC address of the target PC.

🧩 Hardware Architecture

MCU: ESP32 (supports Wi-Fi and BLE)
Ethernet Chip: WIZnet W5500, connected via SPI, enabling hardware-based TCP/IP offloading
Display: 0.96" OLED screen (SSD1306, I2C interface)

Pin Mapping:

ETH_RST: GPIO 4
ETH_CS: GPIO 5
ETH_SCLK: GPIO 18
ETH_MISO: GPIO 23
ETH_MOSI: GPIO 19
OLED_SCL: GPIO 22
OLED_SDA: GPIO 21

🧠 Software Stack

Development Environment: Arduino IDE (Board: ESP32 Dev Module)
Key Libraries:
- ESP_DoubleResetDetector: Allows entry into setup mode by double-resetting within 10 seconds
- Custom-modified WebServer library for ESP32 compatibility (located under /libdeps)
Main Features:
- Web-based configuration UI to input Wi-Fi credentials, MAC address of the target PC, and WebSocket server address
- Communication with a WebSocket server to trigger Magic Packet transmission

🔄 Operation Flow

Setup Mode: Triggered by double-resetting the ESP32 within 10 seconds
Web Access Point: The device hosts an AP with SSID WoL_Config to provide access to the configuration page
User Configuration: Inputs include Wi-Fi SSID, password, target PC MAC address, and WebSocket server URL
Active Mode: Once configured, the device connects to the WebSocket server and waits for a trigger
Magic Packet Transmission: When a MAC address is received from the server, the ESP32 sends a WoL packet to power on the PC

🧩 Role & Value of W5500 Chip

Hardware TCP/IP Stack: W5500 offloads the TCP/IP stack from the MCU, freeing up resources on the ESP32
Low Power and High Stability: Improves efficiency by reducing CPU overhead and ensuring stable Ethernet connectivity
Real-Time Performance: Offers reliable packet delivery for time-sensitive tasks such as Magic Packet transmission

📈 Strategic Value to WIZnet

Expanding IoT Market: Demonstrates how W5500 can be effectively integrated into modern IoT use cases
Developer Community Engagement: Open-source projects like this increase awareness and adoption of WIZnet products among makers and hobbyists
Product Versatility: Shows how W5500 complements ESP32 in hybrid Wi-Fi + Ethernet architectures, widening its application range in industrial and home automation

Documents

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