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Re: limit switches
This is definitely a simple matter of testing for the wrong value in code. Digital inputs on the RC (but not on the OI) have "pull ups", which means they are set to register as 1 in software when not grounded. Your input will be in the 0 state when the switch is pressed. This isn't a problem at all, just invert where you have tests for 1s and 0s.
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