Hey David,
Just to let you know here is the apps status function for the bottom bar:
https://github.com/OpenSprinkler/OpenSprinkler-App/blob/master/www/js/main.js#L5058
For rain sensor, the check I use is as follows:
https://github.com/OpenSprinkler/OpenSprinkler-App/blob/master/www/js/main.js#L5153
Hope this helps with that issue