I do plan to move from just using beacons now to using MQTT, since that does seem to enable Mobile App functionality of some sort.  I'm still not seeing the great increase in battery life I'd hoped to see, but I think that's either because of the possible numeric processor bug, or some generic batteries I was using.  I also added some boot code to cut back the beacon rate and make sure I'm in low power mode, so we'll see if that helps.

As far as the water sensor, the Demo looks like that should do the trick if you want one hooked up, but I've already got one on the Lacrosse weather station that is hooked up to the Raspberry Pi.  I just haven't put the data on the web page.  I'm accumulating it though.  That's actually been in the back of my mind for the last couple weeks because it's been raining off & on here.

Lately I've been too busy printing enclosures for the mcModules with my new 3d printer (birthday present from my wife, yay!) thanks to the post by kristofferis in mc-Product General.  Not a perfect solution, but at least I don't have bare circuit boards strewn about