arduino as distance sensor for a MaxMSP Patch

Hi- I took a class and made a patch in it that uses a distance sensor that goes into a makeboard and read on the patch. the object is mb.usb which i think means Make board, usb. So now i am trying to change it so the distance sensor is read on an arduino instead. my friend helped me program the arduino, so it reads a list of numbers. is there an object that picks those numbers up? I think that I seem to remember that the first time, I needed to add something to the object library (or something) for it to work, do i need to do that again for the arduino?