KNX

KNX is probably one of the oldest and most prominent protocols to build automation modules, KNX is open source and works across multiple mediums such as infrared, RF, twisted-pair wiring, Ethernet and more. 

Unlike other protocols mentioned here, KNX is decentralized. Meaning, it does not need a hub to operate and every single KNX unit is a standalone ecosystem by itself. This gives an advantage that the network will continue to function even if one device or unit malfunctions.

Many new construction projects are still being built without proper building technology and planning for the future. Maybe together we can change that.