magc

reader.beginWrite("card data", "card label") -- Sets the device to write the next swiped card with the given label and data.
reader.cancelWrite() -- If the device is waiting for a card to write, cancel that (the next card will be read instead)
reader.isWaiting() -- Returns whether the device is waiting for a card to write
reader.setInsertCardLight(true/false) -- Sets the state of the orange light