There are on Github MQTT Libraries for .Net available you could use with Unity.

On our side MQTT is planned but so far not with very high priority because MQTT is not much used on PLCs.

This should work. Are you not able to import the signals with an empty top node ID?

Hi, did you checked the Beta. Is everything working fine for you?

Hi, no I am sorry we can't provide this. It was a prototype and we used in the Unity Project some basic Unity UI-Stuff, the game4automation OPCUA interface and Vuforia for marker tracking.

There will be a value in the next release which will allow to configure the "no responding" time which will set the interface to disconnected. 

Could you send me please your variable table (*.sdf) where you are using DBS for me to check?

Next release is planned in 1-2 weeks. It will be integrated there.