Multicast can be used on internal networks to send a message to every client which is listening for it. It is, for instance, used to find network printers. Some are reserved, others can be used by any application:
http://www.iana.org/assignments/multicas...sses.xhtml
In my case, a server sends a multicast request every 15 seconds. Online clients should identify themselves on this request.
(I use this for auto configuration in a setup with real and virtual robots. Because it is intended for a stage performance, it is critical that clients can be replaced in a matter of minutes and without manual configuration in case something goes wrong.)
I have implemented this in a Windows IOT application for the real robots, and on the server, both with the plain microsoft network library. But for some reason it doesn't work with Esenthel.
It's not a huge problem, but i was just wondering why it didn't work.