There is the KNX standard, but it's to home automation what the USB standard is to PC expandability. Yes, there's a standard, but saying that you're going to bu

There is the KNX standard, but it's to home automation what the USB standard is to PC expandability. Yes, there's a standard, but saying that you're going to build a KNX installation is like saying you're going to build a USB installation. It can do anything, but anything you want it to do requires specific software, and the software in the KNX ecosystem is either a proprietary lock-in or just plain horrible.