Hi Frank,
again thank for your quick answers. As far as I know C1 has no I2S, but I am not sure.
Just checked the wifi settings, my router tells me its IPv4 (is that Network/DNS?), cmd tells me that IPv4 of Network and DNS are the same, so there should not be a problem. But I lost connection again. I had wifi and Ethernet plugged into the device and was able to puTTy into it via Wifi in order to have a look at /etc/netctl/. Funny thing is that I did also loose the connection via Ethernet. My router tells me that both connections (Wifi and Ethernet) are still working. Strange
Good night
Tinitus
Cool about the IR