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Send Custom Messages from a Java App
Hey Guys,
does anyone know how to send a custom message from a java application using the sharing services.
I've already build the sharing services and wrote a receiver class in unity (based on custom messages). Everything works fine when Im sending from a HoloLens to another HoloLens. But now Im trying to send a message from my java application (based on the Java TestApp).
The HoloLens receives the message but I then the following Exceptions spawns:
KeyNotFoundException: The given key was not present in the dictionary.
System.Collections.Generic.Dictionary`2<HoloToolkit.Sharing.Tests.CustomMessages/TestMessageID, HoloToolkit.Sharing.Tests.CustomMessages/MessageCallback>.get_Item
This is the code snippet in Java where I`m sending the message:
NetworkConnection
sessionConnection=_currentSession.GetSessionNetworkConnection();
//MessageID.SessionControl.swigValue()
NetworkOutMessage msg = sessionConnection.CreateMessage((byte)186); //The HoloLens is receiving on 186
msg.Write(10);
sessionConnection.Broadcast(msg,
MessagePriority.Immediate,
MessageReliability.UnreliableSequenced,
MessageChannel.Avatar);
sessionConnection.Broadcast(msg);
I really dont know wheres my error and I hope you can help me!
thanking you in anticipation
Answers
I am using MQTT to communicate with external devices. There is a unity asset for that, which we tweaked to work with HoloLens (actually, UWP). From the communication with the developer of that I am expecting a compatible version of the asset soon. ALso you could use the underlying M2Mqtt library as well.
@herbutant how did you run mqtt together with the hololens? I still have some trouble to build my project. Can you send me the link to the version of mqtt, that you have used?
thanks