Quote:
Originally Posted by androb4
It's not working because you are supposed to connect the switch to SIG and POWER.
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That's not correct. The digital sidecar has a pullup to 5v on the signal line. Connecting a switch between signal and power means that signal will never change from 5v. You need to connect the switch between signal and ground, so that signal will switch from 5v (when open) to ground (when closed).
I also guess that something is wrong with power. Follow Alan's suggestions.