How to track devices in Google Universal Analytics from Air mobile application?

I don't know if you managed to make it work, but it kind of worked for me, I did this:

var _urlReq:URLRequest = new URLRequest('http://www.google-analytics.com/collect');

                              var uuid:String = 'my-generated-uuid';

                              _urlReq.method = URLRequestMethod.POST;

                              var scName:String = '&v=1&tid='+myTrackingCode+'&cid='+uuid+'&an='+myAppName+'&av=1.0&t=appview&cd='+myScreenName;

                              _urlReq.data = scName;

                              var urlLoader: URLLoader = new URLLoader();

                              urlLoader.load(_urlReq);

I say "it kind of worked" because I haven't been able to send custom events yet, butI'm on the right track.

Not yet.

But looks like I should.

I think I will use sytem.Capabilities to guess device model and set appropriate user-agent string from list.

But how many devices I can detect using this way? Can I detect ipad 1, 2, 3, 4?