This post will tell you everything you need to know about MQTT communication which will enable you to use it communicate between devices.
Project tutorial by BnBe_Club
Learn how to use Arduino IoT Cloud and Amazon Alexa to switch the channel, adjust the volume and turn on or off any TV.
Project tutorial by 4 developers
As a follow up to the room thermometer project, we write a sketch that communicates with an online weather service and displays the weather.
Make an EC/pH/ORP/temperature sensor device to monitor water. Interact with it through a website using Bluetooth Low Energy.
Project tutorial by uFire
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