Anyone know what the slowest serial baud rate that can be set? I'm looking for something that can do 45 baud. None of the current crop of uarts can be set to such a slow speed.
It would help if I knew what you were doing with it and why you need that speed?
RTTY?
You can go as slow or as fast(well to a limit) as you want in software.
Read this thread to get you started:
http://forum.arduino.cc/index.php?topic=83815.0