Well, after wandering about the place looking for this, if you have a LaCrosse 3600 weather station, and know about coding - this may be helpful. It amy also be useful for other stations, not sure.
http://www.chalmers.com.cn/open3600/open3600_v020c.zip
It’s the full source code, and compiled binaries as well, READMEs etc of the whole thing. Very interesting reading. But I suspect it needs some work.
It is available apparently from the original site in .nl, but I can’t access that site.
Hope this is helpful. As you are aware, you can access the WS-3600 from it’s heavyweather software, clunky, or directly with fetch3600, part of this opensource package. Any programming gurus will have a field day with this code.