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38 lines
1.9 KiB
HTML
38 lines
1.9 KiB
HTML
Two weeks ago when I [installed my weather station][install] I setup the wview
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software to log the current conditions and generate and upload
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HTML and graphs to [the weather page][weather]. wview seemed like the
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perfect tool for the job but unfortunately it proved unreliable, even with the
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built in process monitoring. After a few hours of running fine it appeared the
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HTML generation process would hang, preventing any further updates to the
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website.
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[install]: /personal/2010/09/weather-station/
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[weather]: /weather/
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wview has a lot of functionality and thus a lot of code, which turned me
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off trying to track down the bug. I looked around for
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alternatives and found [Open2300][open2300], which is a core collection of
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functions for communicating with a LaCrosse WS-23xx weather station and a set
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of tools. wview logged its observations to an SQLite database, which seemed
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appropriate for this application. There were tools in Open2300 to log current
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conditions to MySQL and PostgreSQL databases but not SQLite. So last weekend
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I spent some of the afternoon learning enough of the SQLite C API to add
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such a tool. The result is in my
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[git mirror of the Open2300 SVN repo][open2300git]. Once the SQLite tool is
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tidied up a bit more I'll submit it upstream.
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[open2300]: http://www.lavrsen.dk/foswiki/bin/view/Open2300/WebHome
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[open2300git]: http://github.com/wezm/open2300
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Now I had a database of observations I needed to replace the HTML pages
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that wview was previously generated. To do this I wrote a small
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[Lua tool][weather-tools]
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to query the database and output the results to a [JSON][json] file. The
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JSON is used on the new [weather page][weather], which is largely populated
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by Javascript and uses the [flot][flot] and [dygraphs][dygraphs] libraries
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visualise the weather data.
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[json]: http://www.json.org/
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[flot]: http://code.google.com/p/flot/
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[dygraphs]: http://dygraphs.com/
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[weather-tools]: http://github.com/wezm/weather-tools
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