Problem: Arduino Uno + Ultra Compact RS232 to TTL Converter -> Projector-Control

das_benni:
Now it works... i used a cross gender changer, because it doesn't worked without. The manual tells me to use a crosscable... With the the USB-Adapter i need a crosscable, instead of the RS232-Konverter – its crossed internal ;D

Glad you got it working though I was of no help in doing so.