---
title: "Beware of multicast behavior of W5500"
url: "https://maker.wiznet.io/taylor/projects/beware-of-multicast-behavior-of-w5500/"
markdown_url: "https://maker.wiznet.io/taylor/projects/beware-of-multicast-behavior-of-w5500/md"
type: "UCC: User Created Content"
author: "https://www.windesign.work/"
author_url: "https://www.windesign.work/archives/1424#more-1424"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "https://www.windesign.work/"
original_url: "https://www.windesign.work/archives/1424#more-1424"
published: "2022-11-16"
language: "en"
likes: 4
views: 1075
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Beware of multicast behavior of W5500

> W5500 (manufactured by WIZnet), which I intend to use as an Ethernet HAT for Wio Terminal, has found that it is necessary to be careful when

Original author: https://www.windesign.work/ (source: https://www.windesign.work/archives/1424#more-1424)

## Documents and links

- [Ethernet3](https://github.com/katsumin/Ethernet3) (code)

## Article

Original : <https://www.windesign.work/archives/1424#more-1424>

Author : WinDesigns's Page
Published On : 2020-11-01

The author decided to make a HAT of Wio Terminal. The Wio Terminal is a SAMD51-based microcontroller with Wireless Connectivity powered by Realtek RTL872DN that's compatible with Arduino and MicroPython.

: [Wio Terminal](https://wiki.seeedstudio.com/Wio-Terminal-Getting-Started/)

![](https://maker.wiznet.io/upload/ckeditor5/953997257%5F1669841069%2Ejpg)

The author used WIZ550io. These are other articles.

1. [Prototype of Ethernet HAT for Wio Terminal](https://www.windesign.work/archives/1417)

2. [WIZ550io conversion board for Wio Terminal](https://www.windesign.work/%e8%a3%bd%e5%93%81%e4%b8%80%e8%a6%a7/%e3%83%8f%e3%83%bc%e3%83%89%e3%82%a6%e3%82%a7%e3%82%a2/wio-terminal/wio-terminal%e5%90%91%e3%81%91wiz550io%e5%a4%89%e6%8f%9b%e5%9f%ba%e6%9d%bf)

The author describes the experience of using the multicast of W5500.

W5500 UDP Function Multicast : <https://docs.wiznet.io/Product/iEthernet/W5500/Application/udp#multicast.>

---

Source: https://maker.wiznet.io/taylor/projects/beware-of-multicast-behavior-of-w5500/