I'm having some trouble with bad commands. the correct commands for my project work great, but if I enter a command wrong it seems to lock up and the pin 13 led comes on. my code is still pretty simple and I don't see how it could cause this, and I don't see how the library could do it directly either. could it be an overflow someplace?
here's my code
http://download.growcontrol.com/arduino/usbmessenger.pde