Unless the App is constantly running in the background, how does it track your current location and orientation? Also, there is a certain amount of drift associated with dead reckoning. Must one occasionally go to a benchmark location and indicate such to the controller device(s).

I notice that the demo operator is always moving the device in a plane prior applying a rotation in order to execute a command. What happens if I'm carrying something (such as a drink or a kid) that discourages such deliberate action?

I hope that the location scheme does not attempt to use the WiFi signal in any way because many of our systems incorporate multiple access points. However, the WiFi signal might be useful to distinguish the pool house from the main house. And, GPS could be used to detect re-location from the summer house to the main house.