inside/outside perimeter detection at lawn center

purplelobster

New member
Hi all,
I'm new to ardumower and I am making plans to build a robot lawn mower.

It is unclear to me if the robot is able to detect that the perimeter sender has stopped working (due to a defect or a grid blackout).
Is the perimeter signal also detectable in the center of the lawn? (in normal use)
Commercial robot lawn mowers are able to do this, I'm wondering how.
 
Oben