Below are example data files produced by wx200d(8), for download or just looking at. I chose this day because the raw data file was fairly small, there was no wind, then wind, then rain, and the temperature went over 100 degrees Fahrenheit. What's up with that temperature you say? The sensor happens to be located above my air conditioner unit (oops!) Contrast it with the indoor temp and notice it goes up every time the air conditioner is on. Yeah, yeah, I should fix that. But I don't have a more convenient way to arrange my sensors yet.
wx200.txt and wx200d.5 describe most of these file formats.
Tim Witham's wx200d format is identical to the real wx200 data above except that groups are sent only if some bit (any bit) has changed since the last time sent. In addition, if only the HH:MM:SS timestamp of an 8F has changed (the first 3 bytes) then it sends a new 'FF' group instead, containing 'FF', the 3 time bytes, and the checksum.