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I live close to the DCF77 radio transmitter, so my signal was always pretty strong and clear. This is of course not the case for everybody :-) Gwen Roelants did run into problems. He writes:

Although your code works (thanks for that!) it looked like it was very sensitive to how the antenna was positioned.
I found that I did receive a signal every second, but that for the longer signals, I sometimes got a short flash interrupting it, causing the library to add 2 seconds instead of one. Since I got such a flash in almost every minute it could take a very long time before a proper sync was found, and because 2 seconds were counted the time would also drift during the time no new signal could be decoded.
I found a rather simple fix for your code that greatly improved the reliability and time to find a correct signal.

I don’t have an Arduino around so I did not test it, but the proposed changes seem to be reasonable. You can find the changes in the Arduino forums. Thanks, Gwen!

The photo was CCed on flickr by Nathan Gibbs.

I just released a new version of USBTemp. This one includes some minor bugfixes:

• The placement of C5 was wrong in the schematic.
• The host software now compensates for some USB hickups.
• The RRDTool graph generation script adds minimum, maximum and average temperature readings to the summary.

You can get the new version from the Mikrowerk page. The photo of the Galileo thermometer above was CC’ed on flickr by Nick Lawes.

I now publish the temperatures I am measuring in Kaiserslautern on the temperature page. Slightly easier to find ;-)