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How to Build FreeRTOS MQTT Networking with WIZnet W5500 on STM32F103?

This education and maker-oriented project uses WIZnet W5500 with STM32F103RET6 and FreeRTOS to build a wired Ethernet MQTT node.

gavinchang

Published July 12, 2026

109 UCC

25 WCC

55 VAR

4 Followers

Original author: bond007Original source (new tab)

How to Build FreeRTOS MQTT Networking with WIZnet W5500 on STM32F103?

Project description

How to Build FreeRTOS MQTT Networking with WIZnet W5500 on STM32F103? Summary This education and maker-oriented project uses WIZnet W5500 with STM32F103RET6 and FreeRTOS to build a wired Ethernet MQTT node. The STM32 firmware manages FreeRTOS tasks, MQTT configuration, topic subscription, data reception, diagnostics, and application behavior, while W5500 provides the Ethernet MAC/PHY, hardwired TCP/IP stack, socket engine, and internal Tx/Rx buffering. The GitCode project identifies the platform as STM32F103RET6, FreeRTOS V10.0.1, STM32 firmware library V3.5, W5500 Ethernet module, and MQTT…

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