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WIZnet Success Stories: Industrial I/O Controller Powered by ESP32-S3 and W5500

An industrial Ethernet-based I/O controller was developed using ESP32-S3 and WIZnet’s W5500 for applications that require reliable field control and monitoring.

Alan

Published July 13, 2026

Original author: Ihan S

WIZnet Success Stories: Industrial I/O Controller Powered by ESP32-S3 and W5500

Project description

Overview An industrial Ethernet-based I/O controller was developed using ESP32-S3 and WIZnet’s W5500 for applications that require reliable field control and monitoring. The product was designed with: 8-channel DIO 8-channel AIO 1-channel RS-485 Ethernet connectivity based on W5500 A particularly distinctive feature of the product is its digital output design using NPN sink-type DO, which makes it well suited for driving field devices such as buzzers, lamps, and door open/close actuators. By combining flexible I/O expansion, serial field communication, and Ethernet networking in a single…

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