Back in November I posted about my desire for some way to reliably monitor and report available study seats within the library. I recently heard about Pinoccio, an Indiegogo project, and suspect it might do the trick! It's a very small Arduino board with an optional WiFi board. If one plugged a motion sensor, or used the included temperature sensor, it'd probably be able to report whether there was a body sitting at a given location. Small enough to work, WiFi and a long-life(?) battery. Ooh, even better, you don't need the WiFi bridge for each unit, only one for a given area, so that brings down the cost and complexity.
Pricing in bulk seems reasonable - they have a $999 package that would get you 20 monitors and a WiFi shield. Unfortunately we still have a couple hundred seats I'd like to be able to monitor, so realistically we probably still have to get the cost down. That's the primary reason I haven't given more thought to a more finished product like Twine... I think I'll drop the founders a note asking if they think this whole thing would work, and if so, go ahead and pick up a starter kit for testing.
Stay tuned...