a ridiculous reset button

[Mark McLeod]

• Switch plugged into the wrong Digital Input - test by jumping the signal to ground (bypassing power) & watching in code
• Switch broken - test with a multi-meter
• Switch wire broken - test at the far end from the switch with multi-meter
• Wrong wires/connections used - visually inspect, two outside Digital Input pins ONLY (Sig & -), no center pin (NOT pwr)
• Code using duplicate Digital Input - test with a different Digital Input
• Digital Sidecar not powered correctly - check for three brightly glowing power indicators

[Al Skierkiewicz]

Most likely you have wired the switch such that it is always open. The pullup resistors in the interface will pull up to make that input high all the time. You can try just modifying the code knowing that the input will be high until pressed.