Unfortunately this Hackaday article, while starting out strong just drops a cynical load of “everything is bad so just let the internet control your home.”

So-called ‘smart home’ appliances and gadgets have become an ever-more present thing the past years, with nary a coffeemaker, AC unit or light bulb for sale today that doesn’t have an associated smartphone app, cloud service and/or subscription to enable you to control it from the beach during your vacation, or just set up automation routines to take tedium out of your busy schedule. Yet as much

Source: How To Build A Fully Offline Smart Home, Or Why You Should Not