Presence allows Hobson to act as people move.
Map presence (also known as geofencing) allows Hobson to perform task(s) as mobile devices enter or leave a large area (e.g. a 3 mile radius around a house).
Beacon presence (using low-cost beacon hardware) allows Hobson to perform task(s) as mobile devices enter or leave a small area (e.g. a room in a house).
Hobson makes it easy to manage both the people and locations that can be used for presence detection.