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ZL3AI > APRDIG 08.12.03 21:21l 282 Lines 10376 Bytes #999 (0) @ WW
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To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Wednesday, December 03, 2003.
1. Re: Need help forming proper weather packets
2. GPS and APRS stuff for sale
3. Need APRS training presentations for Hamcom '04
4. Re: WX Station decode... Kenwoods
5. WX Station decode... Blame PEET!
6. Re: WX Station decode... Blame PEET!
7. Re: WX Station decode... Kenwoods
8. Re: WX Station decode... Blame PEET!
9. Re: Re: WX Station decode... Kenwoods
10. Default parameters
11. Re: WX Station decode... XXX-wood
12. Re: WX Station decode... Kenwoods
13. MFJ-1270C and Peet 100
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Subject: Re: Need help forming proper weather packets
From: "James Wiles" <kk5wm@ncaars.org>
Date: Tue, 2 Dec 2003 23:11:32
X-Message-Number: 1
Jim KB0THN,
The APRS Spec will give you the information you need to correctly format a
weather packet. Jim WA6OFT's example packet is a good starting place and
the Spec will help you even better understand what each field of the packet
is for. , as well as the expected format/units of the fields. Certain
fields are required whether or not you have data for them and some fields
are optional.
james KK5WM
White County, AR ARES/RACES EC
kk5wm@ncaars.org
On 12/02/03, "James Jefferson <jj@aprsworld.net>" wrote:
>Dear Group -
>
>I have the following weather information:
>
>wind speed
>wind gust
>temperature
>raw rain counter
>
>and the position information consisting of latitude and longitude
>
>I am looking for a packet that will convey this information in a APRS
>specification compliant manner.
>
>Can somebody please help me with this?
>
>Thanks,
>
>-Jim KB0THN
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[commercial content deleted]
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Subject: Need APRS training presentations for Hamcom '04
From: n5oom@arrl.net
Date: Wed, 03 Dec 2003 00:55:11 -0600
X-Message-Number: 3
All,
After having a fairly successful APRS workshop in Dallas this last
September, I've been asked to put together another one to be held at
Hamcom. The workshop takes the form of a set of training presentations. In
September we had 18 presentations, a show and tell and a public service
panel. For Hamcom, I'd like to add to the number of presenters we will
have.
The presentations we did in September are located at:
http://www.n5oom.org/2003_nt_aprs_workshop/
If you are interested in presenting, can suggest a presenter or know
somebody you think would be interested, please contact me immediately. I
have a yahoo group set up for presenters, and have a spreadsheet uploaded
containing a list of my proposed presentations. The yahoo group is at:
http://groups.yahoo.com/group/ntx_aprs_sw/
John Beadles, N5OOM
Richardson, TX
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Subject: Re: WX Station decode... Kenwoods
From: Bob Bruninga <bruninga@usna.edu>
Date: Wed, 3 Dec 2003 09:28:09 -0500 (EST)
X-Message-Number: 4
On Tue, 2 Dec 2003, Byron Smith wrote:
>Correction. Kenwoods dont decode every wx stn on the air.
>The vast multitude of Stand alone weather stations that send the
>RAW "Peet Brothers" Wx data are not decoded by Kenwoods. Only
>"official" APRS "over the air formatted Wx" packets are decoded.
>
>GRRRR!
>
>This was a very myopic choice on their part. I wonder who told them
>this was OK?
Yep, it was me. At the time, there were 5 different formats from Peet
Bros alone, and they were changing every year. (1997) At that time, most
everyone with a WX station was running a PC with it and so it was
extremely rare for there to be any stand-alone WX stations. Since the
Kenwood had to nail down the ROM code then, and the Peet bros formats were
still changing, the only safe option was to go with the APRS format only.
>The extremely sad part is, that *ONLY KENWOODS* dont decode this wx data
>-every other flavor of APRS programs do. (including FINDU)
AH, but those programs you reference run on 600 MHz processors, with
Megabytes of RAM and DISK space that can be re-written whenever a new
format comes out. Ask if those OTHER FLAVORS of APRS were decoding
all of the possible on-the-air PEET Bros formats back in 1997 (even 2
years before the APRS SPEC was published). and the answer is probably
none.
The Kenwood processor is just a tiny processor with limited firmware..
There was not enough code space to add parsers for all the other formats
that were then on the air, much less the new ones being developed. And
the code had to b e forzen for production in 1997 time frame even 2 years
before we could get all the authors then present to even agree on what the
APRS protocol was...
Hindsight is 20/20.... But it doesnt change the conditions back then...
de WB4APR
Bob
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Subject: WX Station decode... Blame PEET!
From: Ralph Milnes <ralphmilnes@patmedia.net>
Date: Wed, 03 Dec 2003 11:24:27 -0500
X-Message-Number: 5
>Byron Smith wrote:
>-----------------
>Correction. Kenwoods dont decode every wx stn on the air.
>
>The vast multitude of Stand alone weather stations that send the
>RAW "Peet Brothers" Wx data are not decoded by Kenwoods. Only
>"official" APRS "over the air formatted Wx" packets are decoded.
>
>GRRRR!
>
>This was a very myopic choice on their part. I wonder who told them
>this was OK? The extremely sad part is,
>that *ONLY KENWOODS* dont decode this wx data - every other flavor
>of APRS programs do. (including FINDU)
Not disagreeing with Byron, but I find it annoying that the PEETS don't
output an APRS-compatible data packet.
GRRRR!
It would seem this would be an easy thing to do, at least for new sales. I
bet APRS users are fair amount of Peet's business.
Bill Peet are you listening?
73,
Ralph KC2RLM
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Subject: Re: WX Station decode... Blame PEET!
From: Richard Garcia <k4gps@bellsouth.net>
Date: 03 Dec 2003 14:54:44 -0500
X-Message-Number: 6
Bill has been retired for many years now. I do not believe he owns any part
of the company anymore.
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Subject: Re: WX Station decode... Kenwoods
From: wa6ylb@theworks.com
Date: Wed, 03 Dec 2003 13:10:45 -0800 (PST)
X-Message-Number: 7
On Tue, 2 Dec 2003, Byron Smith wrote:
>Correction. Kenwoods dont decode every wx stn on the air.
>The vast multitude of Stand alone weather stations that send the
>RAW "Peet Brothers" Wx data are not decoded by Kenwoods. Only
>"official" APRS "over the air formatted Wx" packets are decoded.
>
>GRRRR!
>
>This was a very myopic choice on their part. I wonder who told them
>this was OK?
Bob wrote:
Yep, it was me. At the time, there were 5 different formats from Peet
Bros alone, and they were changing every year. (1997)
--> I know about the multiple formats. They were really similar, and I
remember documenting these changes and sending them to you and other
authors many years ago. There wasn't that much difference between the
formats though. Basically, there was a Peet II and a Peet 2K style format.
I remember 48, 52 and I believe the last is a 56-character format. The 48
and 52 are very rare - Peet will actually (at the time) swap out your 48
and 52 character heads with 56 characters if you needed the latest format.
We actually did this with a U500 about 1997.
At that time, most everyone with a WX station was running a PC with it and
so it was extremely rare for there to be any stand-alone WX stations.
--> I totally disagree with this. In California, where we have a few aprs
users :-), I only know of *1* Wx stn with a PIC on it. The rest were and
always have been non-PIC implemented.
Since the Kenwood had to nail down the ROM code then, and the Peet bros
formats were still changing, the only safe option was to go with the APRS
format only.
--> Perhaps. But I still would have offered the challenge to Kenwood to
attempt to include this in the Kenwoods. Perhaps in a upgrade to D700/D7
firmware upgrade?
>The extremely sad part is, that *ONLY KENWOODS* don't decode this wx data
>-every other flavor of APRS programs do. (including FINDU)
AH, but those programs you reference run on 600 MHz processors, with
Megabytes of RAM and DISK space that can be re-written whenever a new
format comes out.
--> I'd say this is slightly exaggerated. APRSdos for example, which was
touted as running on a 4.77 Mhz XT and 8 Mhz AT's decoded all five WX
flavors just fine in the base 640K. In 1997, there were very few 600 Mhz
machines around. It's true that the programs could be upgraded easy in PC
applications. The Kenwoods could be upgraded in the field too, if Kenwood
decided that they wanted to be great sports and allow us to do such a
thing. Garmin used to only do upgrades to the firmware in the factory, like
Kenwoods does, but then decided that perhaps the user base was smart enough
to use a simple loaded program and prom image to flash their GPS's. It's
purely a marketing decision.
Ask if those OTHER FLAVORS of APRS were decoding all of the possible
on-the-air PEET Bros formats back in 1997 (even 2 years before the APRS
SPEC was published). and the answer is probably none.
--> actually all flavors *did* decode the three formats (48/52/56)then. I
do remember doing the leg work on this issue and did email aprs authors as
to the differences.
The Kenwood processor is just a tiny processor with limited firmware..
--> Agreed. Just how much is unknown.
There was not enough code space to add parsers for all the other formats
that were then on the air, much less the new ones being developed.
--> Peet hasnt changed the format in years. The last one, with 56
characters has been stable before any D700's were ever built.
And the code had to b e frozen for production in 1997 time frame even 2
years before we could get all the authors then present to even agree on
what the APRS protocol was...
--> as I remember it, Peet developed their ascii output code with your
recommendations and thoughts. Yet, it was omitted. Very strange. The APRS
specs committee didnt steer Peet brothers at all in this decision.
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