I need to keep this short, but Like you to know you are no being ignored.
I do understand the 127.0.0.1 as loop back IP .
I am still not sure when IP is "internal protocol" and when Internet protocol.
I take it 127.0.0.1 is an "internal " "IP" address - singular.
I have the "conversion from "nost" name to such IP address done.
So far it looks as I have to have TWO sockets -
one as "plain network" (with loopback 127.0.0.1) and the other as an addition of "RF communication " for future full usage of bluetooth.
I have the "network" socket figured out and working on the RF socket.
I assume they have to be "tied together" somehow.
As far as "remote loopback " goes - such "feature is part of RS232 / EIA standard allowing the originator of the connection to set the receiving end to "remote loop back" to pass the data from the RS232 hardware back to sender without sending it to the attached hardware.
That way the actual transmission path is used both ways without need to communicate to remote system.
Perhaps it can be done by controlling the "RF socket" connection itself.
Back to entertain visiting grand kids. Sorry.