trs300:
No luck... (but thanks for the advice). The RX led shows it receives the send but nothing comes back... I may order the extra chip just to see... Thanks for the help.
I'm sorry, I forgot a step needed for the loop back test to work. As well as a jumper from reset to ground, you need a jumper from pin 0 to pin 1, that is what wires the receive data back to send back to the PC. Try that and see if the test works.
Lefty