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How to Build a Web Server with W5500 on STM32 NUCLEO476RG

Run a lightweight HTTP web server on STM32 NUCLEO476RG using W5500 via SPI with hardware TCP/IP offload and multi-socket support.

jakelee

Published March 18, 2026

26 UCC

4 VAR

Original author: Andrew NeilOriginal source (new tab)

How to Build a Web Server with W5500 on STM32 NUCLEO476RG

Components

Hardware components
W5500

WIZnet - W5500

x 1

STMicroelectronics - NUCLEO476RG

x 1

WIZnet parts

Project description

Step 1: Understanding the Hardware This project demonstrates a practical embedded web server using: STM32 NUCLEO476RG (ARM Cortex-M4) W5500 Ethernet controller (hardwired TCP/IP) Key W5500 specifications: SPI interface (commonly 10–80 MHz depending on MCU) 100 Mbps Ethernet support 8 hardware sockets for parallel connections 32 KB internal TX/RX buffer The W5500 connects to STM32 via SPI: SCK / MOSI / MISO (data lines) CS (chip select) Optional RESET and INT pins This architecture removes the need for a software TCP/IP stack, allowing STM32 to focus on application logic while W5500 handles…

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