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A Beginner's Guide to Home Automation with the Internet of Things (IoT) Rakesh Ch Software Developer and IoT Hobbyist explains how to use IoT/Smart devices. IoT is a network of devices, devices that are embedded with sensors, software, and other technologies with the sole purpose of connecting and exchanging data with other devices over the internet. The user sends a signal to a smart device to turn on or turn on a light, which in turn sends that signal directly to the cloud. Home Assistant is one software that provides a platform/Gateway/Hub functionality.