My device doesn't see Serviio
This could be caused by you having multiple IP addresses on the machine and Serviio binding to a wrong one. Insert IP address of the machine running Serviio into 'Bound IP address' field in Network Settings section in the console or pass system variable serviio.boundAddr including the IP address when starting the server.
Also make sure that TCP port 8895 and UDP 1900 are open in your firewall.
If you are on a Linux based OS, make sure you set up multicast routes properly.
The lack of the multicast route IS the problem. you have to add up route add -net 188.8.131.52 netmask 255.0.0.0 dev eth1 to /etc/network/interfaces to fix the problem permanently.
If on Windows, you can push Serviio service down in starting order.