Made a home automation system for my place, by logging in with my smartphone I'm able to control my lights and other product from anywhere in the world. making coffee from my bed or turning on the lights when I'm arriving home. 6 Hardware sensors connect over MQTT with the server, 6 online sensors keep track of changes online, 10 different output channels from lights, audio to pushnotifications. Made my own PCBs to have perfect intergration with home assistant server.