[Xastir] Xastir Digest, Vol 81, Issue 12

[Mike Swiatkowski, AA9VI]

Last check Tom, it looked like the previous rain in last 24 and rain since midnight issues had been rectified with wx.c v1.78 from CVS.  I'll wait for another storm, but immediately after you posted 1.78 to CVS I tried it out and my data looked correct and not improperly resetting during the entire 2 periods.  I use the Davis Weather Logger for APRS.  I recommend a Wiki update to now include this as a supported interface after the recent improvement in the wx.c code.
  
Thanks.

Mike, AA9VI
>________________________________
>
>---------------------------------------------------------------------
>
>Message: 1
>Date: Mon, 13 Aug 2012 11:27:18 -0600
>From: Tom Russo <russo at bogodyn.org>
>To: Xastir - APRS client software discussion <xastir at lists.xastir.org>
>Subject: [Xastir] Davis, Lacrosse weather code modified, need testers.
>Message-ID: <20120813172718.GA4397 at bogodyn.org>
>Content-Type: text/plain; charset=us-ascii
>
>On Sat, Aug 04, 2012 at 02:46:52PM -0600, we recorded a bogon-computron collision of the <russo at bogodyn.org> flavor, containing:
>> What I'm thinking is that the Meteo (and LaCrosse) code should be modified
>> to emit the total rain (so Xastir can display total rain), but that 
>> Meteo/Lacrosse and Davis APRS Data Logger code should be modified so that 
>> Xastir uses th 24-hour, since-midnight, and 1-hour data the station provides
>> directly without overwriting it.? I don't even think it will be that much work,
>> just a matter of maintaining a flag that says "the data in these strings
>> should not be recomputed."
>
>I have just committed a change to wx.c and database.h that should fix the
>transmission of incorrect rain rates by Xastir when using Davis or LaCrosse
>weather stations.
>
>Rather than modifying the db2aprs programs (Davis Meteo and Lacrosse), I have
>taken the approach that since db2aprs (and the Lacrosse version) already 
>provides 24-hour and last-hour rain data, that Xastir should not overwrite
>these.? Further, I have set the code up so that Davis APRS Data Logger
>rain rates are used directly, instead of being overwritten with incorrectly
>computed values.? 
>
>I have already sent this change in private email to Mike, but ask that all
>Xastir users that have weather stations do a CVS update and check that I have
>not broken Xastir's handling of their own weather station (this change is
>supposed to have ZERO impact on stations other than Davis or Lacrosse).
>
>Mike, you needn't bother applying the patch I sent you if you just do a 
>CVS update, as I already committed the change. 
>
>-- 
>Tom Russo? ? KM5VY?  SAR502?  DM64ux? ? ? ? ? http://www.swcp.com/~russo/
>Tijeras, NM? QRPL#1592 K2#398? SOC#236? ? ? ? http://kevan.org/brain.cgi?DDTNM
>"And, isn't sanity really just a one-trick pony anyway? I mean all you get is
>one trick, rational thinking, but when you're good and crazy, oooh, oooh,
>oooh, the sky is the limit!"? --- The Tick
>
>-----------------------------
>
>

------------------------------

Message: 2
Date: Sat, 18 Aug 2012 08:16:12 -0600
From: Tom Russo <russo at bogodyn.org>
To: Dean Groe <warpedspeed1 at yahoo.com>,    Xastir - APRS client software
    discussion <xastir at lists.xastir.org>
Subject: Re: [Xastir] Davis, Lacrosse weather code modified, need
    testers.
Message-ID: <20120818141612.GA14022 at bogodyn.org>
Content-Type: text/plain; charset=us-ascii

On Sat, Aug 18, 2012 at 05:57:51AM -0700, we recorded a bogon-computron collision of the <warpedspeed1 at yahoo.com> flavor, containing:
> Sorry, I know that I had volunteered to help, but I have been kind of completely swamped. 
> 
> So if I understand the problem correctly, we are trying to address the discrepancies in the four rain categories collected by Xastir.? 

Well, really the problem is that Xastir, until this change, was gathering
only ONE rain number from the Davis stations, using that number as if it were
"total rain since station was reset" and then using that number to compute
the 24-hour rain, rain-since-midnight, and last-hour rain.  It was ignoring
the rain-since-midnight, and last-hour rain that the station 
was providing itself, and incorrectly using the 24-hour number from the station
as if it were the "total rain since reset."  

This leads to some incorrect behavior over time, and is silly since the
station itself is reporting all three numbers.

> Here it is not unusual for two spots a mile a way from each other, or even less, to have differences in rain totals between .5 and an inch, so I guess that we do not split hairs over a few hundredths with our own numbers.? 

This change will have no impact on that sort of thing.  These could all be due 
to differences in siting and installation of rain gauges.

> I have also noticed that my Davis Vantage Pro does not do a good job of keeping time.? In fact right now, it is almost an hour off and I need to adjust it again.? Maybe that is part of the discrepancy problem? 

Nope.  Xastir does nothing with the time from the weather station.

-- 
Tom Russo    KM5VY   SAR502   DM64ux          http://www.swcp.com/~russo/
Tijeras, NM  QRPL#1592 K2#398  SOC#236        http://kevan.org/brain.cgi?DDTNM
"And, isn't sanity really just a one-trick pony anyway? I mean all you get is
 one trick, rational thinking, but when you're good and crazy, oooh, oooh,
 oooh, the sky is the limit!"  --- The Tick



------------------------------

_______________________________________________
Xastir mailing list
Xastir at lists.xastir.org
http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir


End of Xastir Digest, Vol 81, Issue 12
**************************************