Example of iRidium Server Custom UDP driver joining a multicast group

"Joining" is not the functionality of UDP, it is implemented in higher-level protocols.

SSDP already in UPNP  http://dev.iridiummobile.net/Drivers_API/en#.Subscribe

But if you want to go a long way:

var inUDP = IR.GetDevice("In_UDP");
var outUDP = IR.GetDevice("Out_UDP");
IR.AddListener(IR.EVENT_RECEIVE_DATA, inUDP, function(data)
{
   IR.Log("GLOBAL IN DATA (1900 port):" + data)
});
IR.AddListener(IR.EVENT_RECEIVE_DATA, outUDP, function(data)
{
   IR.Log("UNICAST DATA (12345 port):" + data)
});
      
function snd() {
   outUDP.Send(["M-SEARCH * HTTP/1.1\r\n"+
   "HOST: 239.255.255.250:1900\r\n"+
   "MAN: \"ssdp:discover\"\r\n"+
   "MX: 5\r\n"+
   "ST: ssdp:all\r\n"]);
}

Check network settings with https://github.com/coherence-project/UPnP-Inspector

Thx! Can you give me a short example of how to use SSDP with the Subscribe command?

What is "Subscribe command"? It is not part of SSDP protocol.

again: UPnP already realized in i3 Pro!

http://dev.iridiummobile.net/Drivers_API/en#.Subscribe (eventSubURL)

IR.GetDevice("Sonos").Subscribe("urn:schemas-upnp-org:service:AVTransport:1");

sample: http://support.iridiummobile.net/topics/12214-sonos-not-working-with-latest-sonos-firmware/#comment-77802

Martin, the implementation was a success?

yes thx!