Temperature

Past 24 hrs:

The green trace is the inside temperature, and the red trace is the outside temperature. Spikes in the green trace are because the sensor is embedded in my drink coaster. So you can tell when I have a cup of tea on the go. Samples are taken every five minutes.

Past week:

Samples taken every hour for the past six days. I don't really like this, so may increase the sampling frequency.
Then again, I may just get on with the tea drinking instead.

For the curious, the sensors are Dallas DS18B20 units, talking on a one-wire network through a DS2490 one-wire to USB bridge. This is connected to a SheevaPlug device, which is running digitemp software. A crontab entry samples the sensors, and runs a bit of perl to convert the tabular data to a graph and uploads it to the public server.