Thanks for your intrest
Just go to processing.org n download tab,
U ll get all link like 64bit and 32 bit
Open software and download library for firmata.....
I followed all the steps but same problem.... no success.....
Actually i have completed this project on printer port output but now i want to move on usb.
Will u make this for me..( i u can than its good for me, caz i have to submit ma project before weekend)