This is probably the solution you are looking for http://www.ewon.biz/en/home.html

Did you ever get this working? Looking at your screen grab your modbus request looks good for RTU as the checksum is correct. Here is what your request is based on the data you provided Slave ID is 1 Function code is 3 (Read holding registers) Start address is 99 (0x63) Number of registers is 100 (0...

Thanks, I should have mentioned I tried that method and it didn't work. It seems as if on boot something over-rides the alsa settings. I managed a cheap hack to make it work while I search for a proper fix.

I've installed pianobar and after several problems I managed to get it to work. However, after every reboot I have to run amixer or after opening a station it will play for about 5 seconds and it seems to hang up. This is the amixer command that makes it work. amixer cset numid=3 1 I can't seem to g...