Might be worth going commercial with this, there are already some good well-developed devices for environmental monitoring. I'm a fan of the WeatherGoose / Min

Might be worth going commercial with this, there are already some good well-developed devices for environmental monitoring. I'm a fan of the WeatherGoose / MiniGoose / WatchDog: http://www.itwatchdogs.com/product-detail-weathergoose_ii-1.html http://www.itwatchdogs.com/product-detail-weathergoose_ii-1.... Can email, send SNMP traps, expand to multiple sensors easily, &c.