USB Temp & Humidity Monitor/Logger

THUM - USB Temperature/Humidity Sensor (Product)

THUM Screenshots (Screen Shots)

Monitor your garden when your away!

~Thought anyone else looking for something like this would enjoy this link~
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Though it's not USB (it's serial), I've used the Weatherduck for a while now. It's meant for server rooms, but works great in a growroom!

IT WatchDogs, Inc. Home of the Weather Duck and Power Egg

Not only will it monitor temp and humidity, but also light levels and sound levels. Also allow up to 3 other inputs (soil / res temp or moisture for example, or a door switch).

It's got a web interface and can send email alerts for any parameter - like the soil's dry, or on the security side - a doors been opened. Emails can be sent to your mobile phone as well.

The monitoring software makes nice graphs over time, can log into a spreadsheet and can input a webcam. Again that can be triggered, like when the door opens it snaps a photo. Or evertime the lights come on (could make a nice time-lapse...)

Grow on