I recently purchased a Twine from Supermechanical and placed in in my observatory. It records various things, can have sensors attached that measure ambient light, has temperature, orientation - actually you name the sensor, it can pretty much be attached to this and report on it in some way.
The company is a start up, so they are still getting some bugs sorted out, but I've managed to get it reporting the temperature and have started up a channel on Thingspeak.com to record this in real time (as the Twine rules are triggered that is).
I wonder what else can be plugged in to monitor conditions and ambience in the observatory while I'm not there? Getting wifi signals inside the farroday cage I have apparently built will be a challenge, but I plan on using a simple antenna relay to bounce signals inside the cage from outside...I wonder how successful that will be!
Here's the channel I have set up:
https://www.thingspeak.com/channels/4247
Here's supermechanical's page:
http://www.supermechanical.com/