Domoticz

Posted: **Saturday 12 August 2017 9:52**

UDP/IP listening has been added to the framework to allow plugins find and configure remote hardware instances on the network during start up.

A sample showing how to capture and log Dynamic Device Discovery messages has been added to the examples on Github here: https://github.com/domoticz/domoticz/bl ... scovery.py.

Tested successfully on Linux. Works on Windows for messages generated on the machine where Domoticz is running, Windows 10 appears to filter broadcast UDP from network devices even if a firewall rule exists permitting (anyone who knows how to stop that please post here).

Useful IP Address and Port combinations that can be set via the Hardware page:

239.255.250.250:9161-Dynamic Device Discovery (DDD) (default, shows Global Cache, Denon Amps and more)
239.255.255.250:1900 -Simple Service Discovery Protocol (SSDP), (shows Windows, Kodi, Denon, Chromebooks, Gateways, ...)

listening is as easy as:

Code: Select all

self.BeaconConn = Domoticz.Connection(Name="Beacon", Transport="UDP/IP", Address=Parameters["Address"], Port=str(Parameters["Port"]))
self.BeaconConn.Listen()

messages are returned to the plugin via the 'onMessage' call back.

Available in next beta or now if building from source.

Posted: **Monday 18 September 2017 19:43**

This could be this issue :

https://www.tenforums.com/tutorials/496 ... -10-a.html

Look at option 2. Sharing.

Posted: **Monday 12 November 2018 23:15**

I am going to shamelessly bump this.

I was trying your example. It lacks a way to "ask" on the UDP port to 'ask' so to say which devices are there. I tried a couple of ways, but none did work:

The way I think it should work:

Code: Select all

        sAddress = "239.255.255.250"
        sPort = "1900"
        self.BeaconConn = Domoticz.Connection(Name="Beacon", Transport="UDP/IP", Address=sAddress, Port=str(sPort))
    
        data = \ 
            "M-SEARCH * HTTP/1.1\n"+\
            "HOST: 239.255.255.250:1900\n"+\
            "MAN: \"ssdp:discover\"\n"+\
            "MX: 1\n"+\
            "ST: ssdp:all\n\n";
        self.BeaconConn.Send(Message=data)
        self.BeaconConn.Listen()

Ended with Segmentation fault (core dumped)

Try with a separate connection. I suspect Domoticz to reuse the other connection, so internally this is probably more or less the same?

Code: Select all

        sAddress = "239.255.255.250"
        sPort = "1900"
        self.BeaconConn = Domoticz.Connection(Name="Beacon", Transport="UDP/IP", Address=sAddress, Port=str(sPort))
        self.BeaconConn2 = Domoticz.Connection(Name="Beacon2", Transport="UDP/IP", Address=sAddress, Port=str(sPort))
    
        data = \ 
            "M-SEARCH * HTTP/1.1\n"+\
            "HOST: 239.255.255.250:1900\n"+\
            "MAN: \"ssdp:discover\"\n"+\
            "MX: 1\n"+\
            "ST: ssdp:all\n\n";
        self.BeaconConn2.Send(Message=data)
        self.BeaconConn.Listen()

Also an Segmentation fault (core dumped)

So then maybe have a delay before we sent the data?

Code: Select all

        sAddress = "239.255.255.250"
        sPort = "1900"
        self.BeaconConn = Domoticz.Connection(Name="Beacon", Transport="UDP/IP", Address=sAddress, Port=str(sPort))
        #self.BeaconConn2 = Domoticz.Connection(Name="Beacon2", Transport="UDP/IP", Address=sAddress, Port=str(sPort))
    
        data = \ 
            "M-SEARCH * HTTP/1.1\n"+\
            "HOST: 239.255.255.250:1900\n"+\
            "MAN: \"ssdp:discover\"\n"+\
            "MX: 1\n"+\
            "ST: ssdp:all\n\n";
        self.BeaconConn.Send(Message=data, Delay=4)
        self.BeaconConn.Listen()

2018-11-12 23:12:30.033 Error: (myplugin) Connectionless Transport is listening, write directive to 'Beacon' ignored.

I am out of options. Got any clue?

Posted: **Saturday 17 November 2018 22:51**

I figured out why the segmentation fault happened (I debugged the C++ code...). You need to put the "Protocol" thing in there. Adding Protocol="None" solved the segmentation fault.

Now with what I was trying to do, the devices do not answer in the broadcast channel but do only answer to the caller on that port. Domotics does not listen to that.

Domoticz

Python Plugin Framework: UDP/IP Discovery Added

Python Plugin Framework: UDP/IP Discovery Added

Re: Python Plugin Framework: UDP/IP Discovery Added

Re: Python Plugin Framework: UDP/IP Discovery Added

Re: Python Plugin Framework: UDP/IP Discovery Added