I'm using the Boe-bot and I wana do a app that can go to checkpoints then wait for someone to press a button then it continues on the line following. My question is how do I use buttons?
Download a copy of the What's a Microcontroller? tutorial from Parallax's website (in the Stamps in Class section). It's full of all sorts of explanations and examples including the use of switches (chapter #3). A button is just a kind of switch.
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<http://www.parallax.com/dl/docs/books/edu/wamv2_2.pdf>