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Industrial IoT Gateway (Field-to-Cloud) Using Dual-Port SP23

A dual-port IIoT gateway using SP2302's built-in Ethernet for cloud and WIZ850io W5500 via SPI for isolated Modbus field device communication.

Grace_Koo

Published June 12, 2026

112 UCC

25 WCC

11 VAR

Original author: SecurePiOriginal source (new tab)

Industrial IoT Gateway (Field-to-Cloud) Using Dual-Port SP23

Components

Hardware components
W5500

WIZnet - W5500

x 1

WIZ850io

WIZnet - WIZ850io

x 1

WIZnet parts

Project description

Dual-Ethernet IIoT Gateway for Field-to-Cloud — SP2302 + WIZ850io A Field-to-Cloud IIoT gateway that uses SP2302's built-in Ethernet (eth0) for cloud connectivity and a WIZ850io (W5500) SPI port (eth1) for isolated Modbus TCP field device collection. Background: Connecting Legacy Industrial Equipment to the Cloud Factories, energy facilities, and infrastructure sites still rely heavily on PLCs, sensors, and legacy controllers that communicate over Modbus. These devices are designed for stable local network operation — they have no native support for IoT protocols, cloud APIs, or secure…

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