Lots of discussion on this in the presence threads, but basically I wanted to set the size of the detection zone pretty small. I use a wheelchair and I have what I call the bus stop problem: The bus stops about half a block from my house and it could take the driver several minutes to get me unloaded. I don’t want my “I’m home” routine to start until I’m just about at my front door.
At the same time, I had terrible problems with the SmartThings arrival sensor. I worked with SmartThings support for months but we never could get it straightened out.
With the Ibeacons, I can set the detection zone to be right around 3 m, the length of the wheelchair ramp at the front door, so it works very well for my purposes.
