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Interfacing ESP32 with W5500 discussion on Arduino Forum

Trying to connect ESP32 to W5500 for an Ethernet web server using the Arduino IDE and the AsyncWebServer_ESP32_W5500 library (based on ESPAsyncWebServer)

jakelee

Published August 13, 2025

26 UCC

4 VAR

Original author: bdpakOriginal source (new tab)

Interfacing ESP32 with W5500 discussion on Arduino Forum

Components

Hardware components
W5500

WIZnet - W5500

x 1

ESP32

Espressif - ESP32

x 1

Software Apps and online services
Arduino IDE

Arduino - Arduino IDE

x 1

WIZnet parts

Project description

Forum Discussion Summary Context & Goal (bdpak – March 12, 2025): The user was working on connecting an ESP32 to a W5500 Ethernet module to run an Ethernet web server using the Arduino IDE and the AsyncWebServer_ESP32_W5500 library (based on ESPAsyncWebServer) Arduino Forum+1. Although the sketch compiled successfully and showed "Ethernet connected" in the serial monitor, the Ethernet connection failed on the PC side—it displayed a "trying to assign address" message without completing the connection Arduino Forum+1. Troubleshooting Process Suggested Alternative Library (Juraj): Juraj…

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