Sorry for the confusion! The details are in the thread I linked to above. But essentially what I use the IBeacon for is to make the area of detection smaller than it would be with other presence methods. So the lock is unlocked for the same amount of time, it’s just that the system does not detect me as being “home” until I am within about 3 m of my front door. (At the base of the wheelchair ramp there)
The phone detects the IBeacon when I am about 3 m away from it instead of the 15 m of the SmartThings arrival sensor or the even longer distance of regular phone Geopresence.
Because it detected that particular IBeacon, the phone sends a message to SmartThings. Then SmartThings unlocks the door.
Estimote Ibeacons allow you to customize The signal strength of the Beacon, which in turn lets you change the detection area.
I hope that’s clearer.