I think if you get the WH31E, you can purchase a shield for it and then sync it to the ws-2902 (or whatever you have) station. It won't show the temp from it on the console, but will on the app I believe. I don't have this, but am thinking about getting it now. Thanks Bluewave for the post. I have a shield for my thermometer now, but if I can get this one, and sync it to the app, it would much easier than clicking though 2 apps like I do now.
edit: I just bought the WH31E from Amazon. It says it will be delivered today, so I'm going to try syncing this sometime this week.