I have used the transistor version of the Arduino Serial Board...How can i debug my problem ?
2. wire a jumper from pin 0 to pin 1. This will cause a loop-back connection.
5. If you don't see data coming back, time for a scope to see which direction the serial data is failing.
Which pins (pin 0 & pin 1) are you talking about ? I checked schematic but i could not get pin 0 and pin 1 labeled anywhere !