Say I have 2 robots and i'm interested in measuring the distance between the two of them (minimal detection range as possible and maximal range of at least 3 meters)
What can i use to achive this?
I have looked at ultrasonic sensors but from what I can tell they are only used to measure distance between themselves and solid objects, and i need something that can measure between 2 sensors. (360 degrees)
If this is not possible, then can i use a simpler approach of creating a "link" between 2 sensors, and once that link breaks (say at a distance of 3 meters) then both robots will know it?