Thanks for the link  .  I did indeed use it to set up Electrum. I can perform all the given curl queries locally without any problem. If however, instead of 127.0.0.1 I use its network address: 192.16.1.60 I get "connection refused".

This morning I tried to forward all traffic of port 7777 from 192.168.1.60 to 127.0.0.1, but I still get connction refused. I followed this post: http://unix.stackexchange.com/questions/111433/iptables-redirect-outside-requests-to-127-0-0-1  and probably did something wrong, since I am not a debian/raspbian expert.

Either I find a way to forward data correctly, or enable Electrum to listen to port 7777 on 192.168.1.60.