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TCP/UDP Interface for SP2302 + W5500

A practical example of connecting the WIZnet W5500 Ethernet module to the SP2302 SBC using SPI to implement a full TCP server/client and UDP socket interface.

sophia

Published July 23, 2025

92 UCC

14 VAR

1 Followers

1 Following

Original author: SecurePiOriginal source (new tab)

TCP/UDP Interface for SP2302 + W5500

Components

Hardware components
WIZ850io

WIZnet - WIZ850io

x 1

Project description

Description This project demonstrates how to add a stable Ethernet interface to the SP2302 SBC using the WIZnet W5500 Ethernet chip via the WIZ850io module over SPI. The implementation enables full TCP server/client and UDP socket communication on a Linux-based system. By configuring the W5500 as a secondary Ethernet interface (eth1) through Netplan and Python socket programming, the system becomes capable of wired communication alongside built-in Wi-Fi (eth0). This makes the project ideal for industrial gateways, embedded device controllers, and IoT edge nodes that require multi-protocol…

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