Hi Ran, thx for the reply.
i had a feeling i was doing something wrong. So i need to use the tx rx pins. Is that digital pin 0 & 1 ? (http://arduino.cc/en/Reference/SoftwareSerial
). Is it correct understood that the data communicated with the serial libary to the Usb-b plug is also available on pin 0 & 1 (sort of in parallel)?
It seems there are some limitations of serial comm on pin 0 & 1 due to it's a sw implementation only, but i guess i can live with that, if everybody else can.
i guess i need to check wheather in can take the 5v signal before trying.