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[wxsig] Fwd: [opentracker] Weather station update - 1 - Wire possibility

Gerry Creager gerry.creager at tamu.edu
Mon Aug 10 03:37:48 UTC 2009

I had NOT been following it but I'll touch base with Scott.  I'd like to 
get some of these in and do some tests.

Thanks Gerry

Rich Beckwith wrote:
> Don't know if any of you are following the OpenTracker group, but
> thought this very interesting.  Scott is working on a weather station
> product/project. Should be a fairly capable device when he is done. He
> is considering a 1-Wire interface for the instrument.
> Rich
> ---------- Forwarded message ----------
> From: Scott Miller <scott at opentrac.org>
> Date: Fri, Aug 7, 2009 at 6:07 PM
> Subject: [opentracker] Weather station update
> To: opentracker at yahoogroups.com
> The WX boards came in the other day, and I've got the first prototype
> assembled.
> After fighting with it all day, I've finally got the stupid barometric
> pressure sensor working. It involves reading a bunch of calibration
> constants from the device and doing some math, and I found two errors in
> the example code given in the data sheet during my testing. After
> finding the last error, it's now reading within 1 hPa of the barometer
> on the wall, which is within its specified absolute accuracy.
> So as of this afternoon, here's the status:
> Wind speed - working, looks right, needs calibration
> Wind direction - working, no consensus averaging yet
> Rain - working, needs calibration
> Temperature - OK
> Pressure - OK
> Humidity - OK
> No show stoppers with the board layout yet. A couple of minor
> silkscreen errors, and the board stop on one of the RJ12's interferes
> with a boss on the lid, but nothing a pair of side cutters can't fix.
> Scott
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Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
Cell: 979.229.5301 Office: 979.458.4020 FAX: 979.862.3983
Office: 1700 Research Parkway Ste 160, TAMU, College Station, TX 77843

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