Following the same theme as a lot of other recent posts, I have been doing a lot of Android development for my IB Computer Science class. Naturally, I continued to tie Android with the NXT. Initially, Bluetooth was not an option for our outdated G1 development phone*, so I developed this simple solution:
Just a simple solution! For when the situation arises that Bluetooth is not an option, or Arduino board interfacing is not available.
*Fortunately, the Bluetooth API's were back-ported for use on 1.6