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ESP32-C3 + W5500 + CANbus

Bridges CAN bus to MQTT using ESP32-C3 and W5500, enabling remote industrial monitoring and control.

Grace_Koo

Published December 31, 2025

112 UCC

25 WCC

11 VAR

Original source (new tab)

ESP32-C3 + W5500 + CANbus

Components

Hardware components
W5500

WIZnet - W5500

x 1

ESP32

Espressif - ESP32

x 1

WIZnet parts

Project description

Cover image generated by Gemini. ESP32-C3 + W5500 + CANbus: CAN ↔ MQTT Bridge Board This project combines an ESP32-C3, a W5500 (wired Ethernet), and a CAN transceiver on a single board, and uses it as a bridge (gateway) between CANbus and an MQTT broker. The author states that ESPHome is used mainly for OTA (firmware update) convenience, and the data path is built around MQTT. Repository: https://furmwareupdates.com/2025/08/19/esp32-c3-w5500-canbus/ 2) Why send CAN data over MQTT? CAN and MQTT are used in different environments. CAN: A communication bus used inside machines (vehicles…

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