I've noticed some third-party Android app that claims to work with BeamNG.drive's OutGauge feature. This makes me wonder... is there any documentation anywhere for this protocol? I could possibly make an app for my Tizen 3.0 based SmartTV to display such data since it is on the same network as my gaming PC. Well, unless such an app already exists... which is possible.
If you are a programmer the best documentation is in the code that actually sends the data. Look at: lua\vehicle\extensions\outgauge.lua which implements the outgauge functionality