ioNIC Loopback Arduino Example

This guide explains how to control the W55RP20-S2E module using a Raspberry Pi Pico and implement network loopback functionality.

Grace_Koo

Published March 18, 2026

112 UCC

25 WCC

11 VAR

Components

Hardware components

Raspberry Pi - Raspberry Pi Pico

x 1

WIZnet - W55RP20-EVB-Pico

x 1

Software Apps and online services

Arduino - Arduino IDE

x 1

Project description

How to Run Loopback Example This project uses the Raspberry Pi Pico as the main controller to operate the W55RP20-S2E module. Connect to the W55RP20-S2E module via SPI or UART communication to implement TCP Client, TCP Server, and UDP Loopback functionality. Supported Communication Methods: SPI Communication UART Communication Supported Loopback Modes: TCP Client Loopback TCP Server Loopback UDP Loopback Step 1: Prepare Software Download and install the following software: Required Software: Arduino IDE Tera Term Hercules Step 2: Hardware Connections 2.1 SPI Mode Connection When controlling…

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