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Re: [vox-tech] Temperature monitoring (ibutton)
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Re: [vox-tech] Temperature monitoring (ibutton)

Very cool. And did you use gnuPlot to create the gif?


Bill Broadley wrote:
> I forgot the topic, but I believe ibuttons and/or temperature monitoring
> came up recently.  We have been having some heat problems in our server
> room, so I setup some monitoring (tonight).
> Used 3 "Thermocrons" pretty cool widgets, battery powered when off the
> bus, parasitizes power off the serial when on bus.  They can be programmed
> to take a sample every N minutes up to 2048 samples (even when off the
> serial bus), build a histogram, time sync to serial, timestamp each data
> point, etc.  Pretty amazing for a $10.00 sensor the size of a lifesaver
> or so.
> So I hooked 3 of them to a single serial port in our server room to
> measure the temperature behind the rack, ontop of the rack, and in the
> AC vent.  I write the temps to a SQL database, and have a second script to
> view the result:
>         http://spinor.math.ucdavis.edu/~rt/file.gif
> So basically very nice hardware, very flexible, full source, linux
> compatible, very easy to interface to.  Oh yeah and $10 each.
> --
> Bill Broadley

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