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

Rich Beckwith rjbeckwith at gmail.com
Mon Aug 10 14:11:23 UTC 2009

I think he is in the very early stages at this point, but the project sounds
very promising.

He was asking for features we would like to see in a post.  I wrote that I
thought that it would be cool to provide a 1-wire interface that perhaps the
T-238 could use.  A Dallas 1-wire emulation mode would be pretty cool, and
give T-238 users another option for a weather station.  The source code for
the Argent stuff is usually open source, so I imagine an emulator could be
written if a person were so motivated.

Have to wait and see...


On Sun, Aug 9, 2009 at 10:37 PM, Gerry Creager <gerry.creager at tamu.edu>wrote:

> 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
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