Neat stuff! I've done something like one part of that, in my case I used one light sensor looking out a window but connected to an Arduino (JeeNode) with ethernet board, uploading every minute to the thingspeak.com website. Much less powerful than a R-Pi, but very stable and reliable- worked for over a year with no maintenance whatsoever. I also have a number of R-Pi boards now and have not had filesystem stability trouble with them (only real issue is sometimes wifi links drop out & need reboot).
I notice you powered your window watcher from a 9V battery. Probably just a quick test, but if you want longer runtime, three NiMH AA cells in series gives you about 3.6 V, enough for the Moteino, and will work about 4x longer, and you can recharge them too. Alkaline 9V battery: 550 mAh. NiMH AA battery: 2000 mAh