I've tried to get my original cadence/speed sensor to work, without success (Edge 500 bundle-gifted).
The head unit works fine, so I'm not sure why there even is a speed sensor, unless for a trainer. Doh.
The sensor lit up red, then showed green when the crank arm went by, then quit.
I saw a guy using the crank arm-mounted sensor, no magnets, no fuss, and wondered about it.
I'd order one or two if I thought they worked, but the original one didn't, and I don't want to waste $40
Any feedback on this type of item, or the finicky-ness of the original sensor?