I used to use other libraries to receive DCC commands with success. So the well known HW with the opto coupler works fine. (http://www.mynabay.com/images/DCC_Monitor/schematic.png
I moved over to Alex Shepherd's NmraDcc library *), it compiles with success for a UNO but I receive random data on the console. There is no correlation between DCC comand's I'm sending and the output. My impression is that I just receive noise or so. So I guess I have an extremly basic problem which I cant see by now.
The HW is connected to UNO's pin 2. I'm using the sample which is included with the lib.
Thanks for any ideas or advices