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ZL3AI > APRDIG 08.09.06 08:14l 230 Lines 8647 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 27 #6, 2/2
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From: ZL3AI@ZL2BAU.#87.NZL.OC
To : APRDIG@WW
Message: 9
Date: Wed, 6 Sep 2006 11:48:50 +0100
From: "Dave Baxter" <dave_at_emv.co.uk>
Subject: RE: [aprssig] Wi-Fi Positioning System (WPS) for APRS
>In addition, GPS often doesn't work in city downtown areas,
>due to the urban canyons. Yet, these places are rich in
>access points.
Depends as much on the GPS receiver and antenna's capabilities, but.....
So long as the AP owners have presumably logged their site with whoever
(MS? And was that done knowingly??) Also, they have an AP that actually
broadcasts the SSID name. Many don't, but are still fully usable so long
as you know the SSID and whatever WPA key they use. (What, you're not using
WPA and a long key? WEP has been "broken" some time ago.)
In this day and age, with script kiddies owning quite powerful laptops etc,
plus "War Driving" as a hobby, anyone with an "Open" WiFi AP, is somewhat
irresponsible. If it's a private or corporate system, one would expect
(yeah right) for it to be locked down hard. Amazingly at the mo', many
aren't, even ones that are behind an otherwise secure company firewall!
In any case, who specifies what in this case? If a point moves (as they
can with office and company moves etc) most IT people will not rename the
thing, as that then needs all the connecting laptops (and other devices) to
be messed with... About the most that will be done, is change the channel
number, if there is an existing system at the new location.
There is some anecdotal evidence, that the "Location Driven Marketing"
thing is what it's about, and it's already going on, with mobile phones in
London for example, but not all networks, and thankfully you have to opt in
(subscribe) if you want it.
If you want to play, get yourself a copy of "NetStumbler". I say no
more... http://www.stumbler.net/
73.
Dave G0WBX.
------------------------------
Message: 10
Date: Wed, 6 Sep 2006 08:44:32 -0500
From: James Jefferson Jarvis <jj_at_aprsworld.net>
Subject: Re: [aprssig] findU status
The maps on my site, aprsworld.net, appear to be working. Would someone like
to make a report that I can actually check into? I don't regularly monitor
findu.com, so if something is screwed up I don't know.
---
I did just check out a single station plot on findu and a track on findu and
they both appear to be working.
---
Findu.com uses the same interface that is available to everyone else.
73's
-James Jefferson Jarvis KB0THN
On Tuesday 05 September 2006 21:20, Steve Dimse wrote:
>On Sep 5, 2006, at 9:10 PM, Tyson S. wrote:
>>I noticed that some of the maps that were coming to my web page
>>directly from aprsworld.net had stopped working because I think there
>>was something wrong with Jame's server, but it looked as though the
>>findu street maps supplied via aprsworld were working. Are the FINDU
>>maps from aprsworld actually OK or am I just not looking for the right
>>thing. I would guess that you have a different source to get maps from
>>his server than what the general public uses.
>
>I'm not sure what James' server situation is currently, the domain I
>use is geo.aprsworld.net, which supplies the map and a geo file so my
>server can draw in the appropriate place. This could be a separate
>server or a virtual domain (for example, as www.aprs.net and
>www.findu.com,and dozens of others, are served on my two machines).
>
>Steve K4HG
------------------------------
Message: 11
Date: Wed, 6 Sep 2006 10:33:34 -0400
From: "Robert Bruninga" <bruninga_at_usna.edu>
Subject: [aprssig] APRS Telemetry
I'm considering a new Symbol for APRS to represent alternative power
systems, so that owners can monitor their off-grid power systems in a
standard way remotely. Also, then we can make summaries of APRS users
contributions to alternative energy. Here are some of the ideas I am
considering:
1) Alternative energy symbol (with overlay for Wind, Thermal, Water or Sun)
2) Standard telemetry formats using the existing KPC-3+ five channel packets
3) TOCALL version numbers to match the formats so that parsers can display
end units wihtout any other info.
For this purpose, I would like to build a table of all existing APRS KPC-3+
telemetry 5-channel systems so we can see if some standards exist. Here are
3 that might be useful for alternative energy systems:
1) System Volts, Charge Current, Load Current, Panel Temperature, Indoor temp
2) System Volts, Charge Current, Load Current, Battery Current, Temp
3) System A volts, System A current, System B volts, System B current, Temp
Each of these would have a different APExxx version number, so that
decoding Systems can decode and display them without any other knowledge...
Anyone that is running off-grid or with alternative energy systems of any
Kind, I would like to hear from you as well, even if you are not using a
KPC-3+ for telemetry...
Bob, WB4APR
------------------------------
Message: 12
Date: Wed, 6 Sep 2006 08:31:23 -0700
From: <scott_at_opentrac.org>
Subject: RE: [aprssig] APRS Telemetry
I'm not too keen on overloading the TOCALL with yet another meaning. I'd
rather see some sort of extensible telemetry format that includes unit
specifiers. Field labels in a separate message would be nice, but I say
ditch the coefficients and put the conversion burden on the originating
device.
For the record, the OpenTracker's standard format is temperature, voltage,
(undefined extra ADC), counter, GPS HDOP. It's used in a few alternative
power applications.
Scott
N1VG
------------------------------
Message: 13
Date: Wed, 06 Sep 2006 08:32:59 -0700
From: "Phillip B. Pacier" <ad6nh_at_arrl.net>
Subject: Re: [aprssig] APRS Telemetry
Hi Bob. I think this is a great idea, though I'm wondering about stations
such as Digipeaters how changing the symbol is going to help overall
network recognition. What is more important? Knowing that the station is a
functioning digipeater, or knowing by it's symbol that it is off grid?
W7RBV-2 is a solar-powered digipeater in Southwest Nevada. I have voltage
telemetry coming from it, but I have not yet been able to do current or
temperature telemetry. I might attempt that again in the near future.
Telemetry is currently compiled and shown at
http://www.aprsca.net/w7rbv2.html
If you need any more information for your database, let me know!
73
Phil - AD6NH
------------------------------
Message: 14
Date: Wed, 6 Sep 2006 11:46:29 -0400
From: Steve Dimse <steve_at_dimse.com>
Subject: Re: [aprssig] APRS Telemetry
On Sep 6, 2006, at 11:31 AM, <scott_at_opentrac.org>
>I'm not too keen on overloading the TOCALL with yet another meaning. I'd
>rather see some sort of extensible telemetry format that includes unit
>specifiers. Field labels in a separate message would be nice, but I say
>ditch the coefficients and put the conversion burden on the originating
>device.
Bob's goal here seems to be to make a standard for the KPC3+, which does
not have the option to have the device do the conversion. The field labels
in a separate message exist, as does sending the coefficients on the air.
I think it would be fine for Bob to create a voluntary standard set of
these for KPC-3 users, for those that wish to use them, but they should not
be part of the APRS spec.
I do think that using an OT or programming a PIC is a far better choice for
most people in this situation, lower power and lower cost. In a custom
device, it is far better to use the user-defined formats to support this
sort of data rather than defining subsets based on yet another overloading
of the tocall.
Finally, I am opposed to using an icon for alternate power, these stations
are digis or weather stations or home stations. The function of the station
is what the icon should represent, not the power source.
Steve K4HG
------------------------------
Message: 15
Date: Wed, 6 Sep 2006 09:48:52 -0700 (PDT)
From: Jason Rausch <jason_at_ke4nyv.com>
Subject: [aprssig] Re: [tapr-announce] 25th Annual DCC Update
This is just a shot in the dark, but will anyone be officialy or even
unofficially videotaping the presentations? It would be great to have the
abilty for those not able to attend to watch the presentations, especially
the APRS related ones.
I just looked at the speaker's schedule and there really is a top notch
line of topics and speakers this year. I'm very sorry I have to miss it
this year.
Jason KE4NYV
RPC Electronics
www.rpc-electronics.com
The HamHUD Project
www.hamhud.net
------------------------------
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