[Geoffrey4283]

Got the COM port cleared and successfully debugged rc_sw1, only to find out that no, the sensor is not getting across. Still unaware of the origin of the problem, waited until I returned home and dropped the code into RoboEmu as you suggested. It worked beautifully! Exactly what we wanted it to do. So apparently our problem is electrical, and we're probably going to spend some time analyzing electrical layouts and try to figure out what the heck is going on. Thanks for all the help on the program, we're halfway there.