Perimeter wire with sensors for robotic mower
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 Many of the robotic mowing options out there use a perimeter wire pegged down to define a boundary. Can the pegs be numbered and when a mower gets near the perimeter it senses (for example) Peg 3. How would 
 a} the individual pegs get their own identity
 b} since they would be (shallowly) below soil how could a robotic mower identify them through the soil?
 Thanks
 
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 @grint Nice topic! 
 But googling immediately led me to this site: http://www.ardumower.de/index.php/en/induktion
 Seems quite easy to build yourself.
 
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 @Yveaux - hi - I've seen that and spoken to them, but they don't use the system with numbered pegs that I'm suggesting to get a clearer map of the robot's location. They simply use a perimeter wire. Their lane-by-lane mowing doesn't work very well, because... knowing where the robot is within the defined perimeter is pretty hard. Cheers, 
 
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 @grint how would a compass sensor perform in a lawnmower robot? 
 
 
			
		 
					
				


