Hello Please Help!!,
I've got my new Arduino Nano V3.0 and it works fine alone. My computer recognizes it when connect to USB port. But when I snap the Nano to DFRobot I/O Expansion (Roboduino Nano Expansion) 2009 the computer reports "Unknown Device" when trying to connect it via USB cable. I appreciate any suggestions/work around.
Thanks,
--PC