Wiring a boolean switch.

[Dr. Manhattan]

We have a basic toggle switch on our bot, wired to the DIO. The switch bridges the power and signal lines, is this how it should be wired?

[Mark McLeod]

No.
It should connect ground and signal one way and nothing at all the other way.

+5v power is not used for a basic switch.

[Integral]

On our DS I found that I could not get a reliable signal if I just let the signal line float. You need to hold the signal high through a pull up resistor. Solder a 1k resistor to the 5V line, then the free end of the resistor to the signal and 1 side of the switch. Ground the other side of the switch. When the switch is open you will have a solid High signal, when the switch is closed a good low.