---
title: "How to use MQTT. IoT Switch Arduino Ethernet(MQTT 活用編。IoT型スイッチ Arduino EtherNet)"
url: "https://maker.wiznet.io/scarlet/projects/how-to-use-mqtt-iot-switch-arduino-ethernet-mqtt-%E6%B4%BB%E7%94%A8%E7%B7%A8%E3%80%82iot%E5%9E%8B%E3%82%B9%E3%82%A4%E3%83%83%E3%83%81-arduino-ethernet/"
markdown_url: "https://maker.wiznet.io/scarlet/projects/how-to-use-mqtt-iot-switch-arduino-ethernet-mqtt-%E6%B4%BB%E7%94%A8%E7%B7%A8%E3%80%82iot%E5%9E%8B%E3%82%B9%E3%82%A4%E3%83%83%E3%83%81-arduino-ethernet/md"
type: "UCC: User Created Content"
author: "knaka"
author_url: "http://knaka0209.blogspot.com/2015/10/mqtt-2.html"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "knaka"
original_url: "http://knaka0209.blogspot.com/2015/10/mqtt-2.html"
published: "2023-02-01"
language: "en"
hardware: ["WIZnet WIZ550io"]
likes: 13
views: 560
comments: 2
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# How to use MQTT. IoT Switch Arduino Ethernet(MQTT 活用編。IoT型スイッチ Arduino EtherNet)

> How to use MQTT. IoT Switch Arduino Ethernet

Original author: knaka (source: http://knaka0209.blogspot.com/2015/10/mqtt-2.html)

## Components

- **WIZnet WIZ550io** x 1 ([docs](https://docs.wiznet.io/Product/ioModule/wiz550io))

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Source: https://maker.wiznet.io/scarlet/projects/how-to-use-mqtt-iot-switch-arduino-ethernet-mqtt-%E6%B4%BB%E7%94%A8%E7%B7%A8%E3%80%82iot%E5%9E%8B%E3%82%B9%E3%82%A4%E3%83%83%E3%83%81-arduino-ethernet/