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STM32 W5500 Ethernet Tutorial Part 2 – TCP Server in Blocking Mode

In this tutorial, we’ll take the next step and create a TCP server on STM32 using the W5500 module.

viktor

Published November 12, 2025

Original author: ControllersTechOriginal source (new tab)

STM32 W5500 Ethernet Tutorial Part 2 – TCP Server in Blocking Mode

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Project description

⚙️ STM32 + W5500 Ethernet — TCP Server Tutorial This tutorial shows how to turn an STM32 microcontroller plus a W5500 Ethernet module into a TCP server. The server listens for incoming TCP connections, echoes received data back to the client, and uses the data to control a hardware component (for example an LED) on the STM32 board. 🧰 What the project covers Using the W5500 module via SPI to interface with the STM32. Setting up the socket in TCP mode, binding it to a port, listening for connections, accepting a client, then using recv() and send() (or the equivalent library calls) to receive…

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