I think will just have to wait until these are out in the field to figure out exactly what they’re doing.
My friend (who is also a network engineer) pointed out this in the FAQ:
Amazon verifies that the package belongs to the address and the driver is near the door, turns on Amazon Cloud Cam and unlocks your door.
The question is how are they doing that verification? If “near the door” is microlocation and literally means standing in front of the door and they’re doing that before they turn the camera on, then it would make sense if it was the lock recognizing the scanner device.
My friend suggests that this would make the most sense from an engineering standpoint because if you just go by the driver’s location, the driver might check in while they are still sitting in the truck, causing the door to unlock before they’re actually there.
Or if they just went by GPS, the driver might be standing by the wrong door, maybe the front door when the special lock is on the side door, and then the driver would report that the lock didn’t unlock when in fact the side door lock did unlock.
So my friend thinks it will make sense if they actually have some kind of handshake between the correct lock and the driver scanning device to make sure the driver is actually standing in front of the correct door.
But while all of that is logical, it doesn’t mean that’s the way they’ve implemented this. So again, we’ll just have to wait and see.