there ya go
I still want to play with the honeywell but reeds work well too. Instant might not be solid but should average out.
I would say for hookup (guessing):
(prebuilt)
Code:
12v-[reed]-guino vss
otherwise this might get it (prebuilt has pulldown on vss).
Code:
12v -/\/\/5k/\/\-+-[reed]-gnd
|
to guino vss