I'm currently finishing this and it'll be available shortly after the release of ComfortClient 220.127.116.11.
Once the plugin is loaded and the (serial) comms setup then you can access attribute values on your floorplan(see attached screenshot of some samples). At the moment I am decoding the realtime stats that are fed every 12 seconds. On minute/hour boundaries large blocks of historical data are also sent up the wire though I'm ignoring that for the moment. Once I get a graphing or datawarehouse support in ComfortClient then I plan to decode this too; at the moment it's a lot of info that doesnt fit with the realtime floorplan object model.