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Perimeter wire with sensors for robotic mower

grint last edited by

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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Yveaux Mod last edited by @grint

@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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grint last edited by @Yveaux

@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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Yveaux Mod last edited by @grint

@grint how would a compass sensor perform in a lawnmower robot?
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@BulldogLowell said: @mntlvr said: And if all six switches are set to gnd the total current would only be 1.5 ma (5volts /20k)x6=.0015 amps I believe. the internal pullup resistors are 20k-50k according to arduino spec. yeah, I know, but if you are underpowered already (the radio....) the extra draw may create an issue... who the heck knows. I'll try on one of mine when I get the chance... your code works, and that's a treat, but now I need to understand why the simpler execution of the same code doesn't seem to cooperate with your rig. weird... you code with pinMode(buttonPin[i], INPUT); exactly same board and USB power supply and same transceiver, here are the results Sending device info...sensor started, id 32 send: 32-32-0-0 s=255,c=0,t=17,pt=0,l=5,st=ok:1.4.1 send: 32-32-0-0 s=255,c=3,t=6,pt=1,l=1,st=ok:0 read: 0-0-32 s=255,c=3,t=6,pt=0,l=1:I send: 32-32-0-0 s=255,c=3,t=11,pt=0,l=13,st=ok:RemoteControl send: 32-32-0-0 s=255,c=3,t=12,pt=0,l=4,st=ok:1.15 Setting up Pin0 send: 32-32-0-0 s=0,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin1 send: 32-32-0-0 s=1,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin2 send: 32-32-0-0 s=2,c=0,t=0,pt=0,l=0,st=ok: Setting up Pin3 send: 32-32-0-0 s=3,c=0,t=0,pt=0,l=0,st=ok: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: read: 32-32-0 s=3,c=0,t=0,pt=0,l=0: Setting up Pin4 send: 32-32-0-0 s=4,c=0,t=0,pt=0,l=0,st=ok: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: read: 32-32-0 s=4,c=0,t=0,pt=0,l=0: Setting up Pin5 send: 0-0-0-0 s=5,c=0,t=0,pt=0,l=0,st=ok: read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch read: 36-81-0 s=0,c=5,t=0,pt=0,l=0: version mismatch Sensor presentation complete send: 0-0-0-0 s=3,c=1,t=16,pt=2,l=2,st=ok:1 Pin 3 changed state... New State: Tripped send: 0-0-0-0 s=0,c=1,t=16,pt=2,l=2,st=ok:1 Pin 0 changed state... New State: Tripped send: 0-0-0-0 s=1,c=1,t=16,pt=2,l=2,st=ok:1 Pin 1 changed state... New State: Tripped send: 0-0-0-0 s=2,c=1,t=16,pt=2,l=2,st=ok:1 Pin 2 changed state... New State: Tripped send: 0-0-0-0 s=3,c=1,t=16,pt=2,l=2,st=ok:0 Pin 3 changed state... New State: Not Tripped
Aluminium Case for MySensors
Hardware • sensor wireless case • • allanvbcrew

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If you look at the Netatmo devices you can see that they have plastic caps and a long plastic notch. I'd bet that the antenna can be found in such an area... I dont think that a small thickness will help to let the radio signal pass. Think of that very thin µ-metal sheet covers on high frequency circuits e.g. in TV or Radio inputs (where you want to stop a radio transmission). They are built to not let radio waves pass and they are thin - so I dont think the thickness plays a major role. As Bulldog wrote paramagnetic blocks radio waves. And aluminum stays paramagnetic even if you reduce the thickness. But I made the experience that relatively small areas, where the radio waves will not get blocked (e.g. plastic caps) can make the difference between no signal and "its working". Also keep in mind that nearly all antennas have a direction. So changing the orienation of the antenna might dramatically change the transmitting capabilties.

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