I have an Arduino Uno connected to a breadboard on pin #3 and a 10k resistor and the 3.3v pin.
I then installed a button in between them so I can represent a break in the connection to fire the interrupt.
Trouble is the button does not seem to fire the interrupt at all. If I remove the 3.3v wire so that it floats on pin #3 then it wakes up.
Any ideas why I cannot seem to get it to recognize the break in connection?
test.ino (1 KB)