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How to Build Industrial Ethernet with W5500 on the ERQOS EQSP32CE ESP32-S3 PLC?

The ERQOS EQSP32CE is an ESP32-S3-based industrial controller that combines I/O, RS232/RS485, CAN, Wi-Fi, BLE, and wired Ethernet in a DIN-rail PLC format

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Published September 10, 2026

Original author: erqosOriginal source (new tab)

How to Build Industrial Ethernet with W5500 on the ERQOS EQSP32CE ESP32-S3 PLC?

Components

Hardware components

WIZnet parts

Project description

Summary Source: https://refcircuit.com/articles/915-teardown-erqos-eqsp32ce-plc-ethernet-version.html The ERQOS EQSP32CE is an ESP32-S3-based industrial controller that combines protected field I/O, RS232/RS485, CAN, Wi-Fi, BLE, and wired Ethernet in a DIN-rail PLC format. A hardware teardown identifies the Ethernet device as the WIZnet W5500, which provides the controller's SPI-connected 10/100 Ethernet path to the RJ45 interface. ERQOS software then presents Ethernet as a managed system service with DHCP or static addressing, link-state monitoring, MQTT connectivity, and automatic Wi-Fi…

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