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ZL3AI > APRDIG 16.03.07 07:05l 262 Lines 10401 Bytes #999 (0) @ WW
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To : APRDIG@WW
Today's Topics:
1. Re: Re:All APRS Digipeaters In The World (Almost!) Mapped On UIview
(Ray Wells)
2. APRS Multi-Mode Tracker (Scott Drumm)
3. RE: APRS Multi-Mode Tracker (Michael Hatzakis Jr MD)
4. Re: APRS Multi-Mode Tracker (Stephen H. Smith)
5. RE: APRS Multi-Mode Tracker ('Scott Miller')
6. Re: APRS Multi-Mode Tracker (Curt, WE7U)
----------------------------------------------------------------------
Message: 1
Date: Mon, 05 Mar 2007 07:49:05 +1100
From: Ray Wells <vk2tv_at_exemail.com.au>
Subject: Re: [aprssig] Re:All APRS Digipeaters In The World (Almost!) Mapped
On UIview
Richard Hoskin wrote:
>Bob,
>
>My understanding was that we used the SSID of the station's callsign to
>indicate a secondary function.
>
>Eg
>
>Here are those common defaults:
>
>-0 Home Station, Home Station running IGate.
>-1 Digipeater, Home Station running a Relay Digi, Wx Digipeater
>-2 Digipeater [#2 or] on 70CM
>-3 Digipeater [#3]
>-4 HF to VHF Gateway
>-5 IGate (Not home station)
>-6 is for Operations via Satellite
>-7 Kenwood D7 HH
>-8 is for boats, sailboats and ships (maybe 802.11 in the future)
>-9 is for Mobiles
>-10 is for operation via The internet only
>-11 is for APRStouch-tone users (and the occasional Balloons)
>-12 Portable Units such as Laptops, Camp Sites etc.
>-14 is for Truckers
>-15 is for HF
>
>So a home station running a digi and an igate will have a -1 ssid and use
>the icon of an IGate. (It may also have a blue square around it if it is
>running UI-View)
>
>Or a weather station that is also a digi would use the blue WX icon with a
>ssid of -1 etc.
>
>Is this still valid and how does it integrate into your color codes.
>
>Cheers
>Richard
>VK3JFK
This is all well and good if one's life revolves around APRS, however, for
a multi-purpose station running APRS, BBS, Node, Packet Terminal program,
etc, it tends to fall apart a bit so that only broad compliance with a
suugested SSID list is possible, if at all.
The guys running Fpac in Florida use -8 and -9 for L2 and L3 connections.
In France the trend is -10 and -11. In VK2 it was -0 and -1. I use -1 and
-2 because the bbs is -0.
Comply if you can but expect non-compliance as well :-(
Ray vk2tv
------------------------------
Message: 2
Date: Sun, 4 Mar 2007 17:21:21 -0600
From: "Scott Drumm" <swdrumm_at_gmail.com>
Subject: [aprssig] APRS Multi-Mode Tracker
A non-text attachment was scrubbed...
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Message: 3
Date: Sun, 4 Mar 2007 15:57:27 -0800
From: "Michael Hatzakis Jr MD" <lists_at_hatzakis.net>
Subject: RE: [aprssig] APRS Multi-Mode Tracker
microphone connector of the radio for the beacon. An RS-232 splitter
Yes, this works fine in my car. I do this with a Deluo GPS unit that feeds
a TinyTrak to a radio that is the beacon. The GPS has unidirectional data,
so multiple devices can be fed. In my car, the other split goes to my
Laptop to feed mapping/tracking and also can attach to a second TNC. Not
sure you can use the same radio for both, though.
Michael K3MH
_____
>From: Scott Drumm
>Sent: Sunday, March 04, 2007 3:21 PM
>To: aprssig_at_lists.tapr.org
>Subject: [aprssig] APRS Multi-Mode Tracker
>
>I need some advice on building a multi-mode APRS tracker.
>
>The attached schematic illustrates what I'm trying to do. In case the list
>manager strips attachments, it shows that I want to build a beacon-style
>tracker that will simultaneously feed the GPS position and APRS network
>traffic to a laptop PC. The GPS data would be used for onboard vehicle
>navigation and the APRS feed is to monitor the location of other stations.
>
>I'm using a dedicated radio (Yaesu FT-1500) for this purpose. The FT-1500
>has a 6-pin DIN port on the back specifically for TNC communications.
>
>My original design concept was to attach a Byonics TinyTrak3+
><http://www.byonics.com/tinytrak/tt3plus.php> to the microphone connector
>of the radio for the beacon. An RS-232 splitter
><http://www.sfcable.com/store/d920-yy.html> would send the GPS
><http://www.deluoelectronics.com/customer/product.php?productid=99> data to
>the TinyTrak and to the laptop simultaneously. An Elcom USB MicroTNT
><http://www.elcom.gr/> in KISS / listen mode attached to the radio's data
>port would send all of the APRS data to the laptop. Will this work?
>
>Alternatively, I just read a writeup about the PacComm
><http://www.paccomm.com/> dual-port PicoPacket...
>
>It looks like the PicoPacket will do all of the above, w/o the need for a
>second TNC or strange cabling, yes?
>
>Thanks!
>73, N3XFD
>
>--
>Scott W. Drumm
>swdrumm_at_gmail.com
------------------------------
Message: 4
Date: Sun, 04 Mar 2007 18:51:13 -0800
From: "Stephen H. Smith" <wa8lmf2_at_aol.com>
Subject: Re: [aprssig] APRS Multi-Mode Tracker
swdrumm_at_gmail.com wrote:
>I need some advice on building a multi-mode APRS tracker.
>
>The attached schematic illustrates what I'm trying to do. In case the
>list manager strips attachments, it shows that I want to build a
>beacon-style tracker that will simultaneously feed the GPS position
>and APRS network traffic to a laptop PC. The GPS data would be used
>for onboard vehicle navigation and the APRS feed is to monitor the
>location of other stations.
>
>I'm using a dedicated radio (Yaesu FT-1500) for this purpose. The
>FT-1500 has a 6-pin DIN port on the back specifically for TNC
>communications.
>
>My original design concept was to attach a Byonics TinyTrak3+
><http://www.byonics.com/tinytrak/tt3plus.php> to the microphone
>connector of the radio for the beacon. An RS-232 splitter
><http://www.sfcable.com/store/d920-yy.html> would send the GPS
><http://www.deluoelectronics.com/customer/product.php?productid=99>
>data to the TinyTrak and to the laptop simultaneously. An Elcom USB
>MicroTNT <http://www.elcom.gr/> in KISS / listen mode attached to the
>radio's data port would send all of the APRS data to the laptop. Will
>this work?
>
>Alternatively, I just read a writeup about the PacComm
><http://www.paccomm.com/> dual-port PicoPacket...
1) DON'T put up line art (like your schematic) as JPGs!! JPG is only
intended for continuous-tone images; i.e. photos. It applies image
compression by looking for gradual gradients of brightness and color from
groups of adjacent pixels. When applied line art images like your block
diagram that jump from 100% white to 100% black in a single pixel, you get
the kind of squirmy, fuzzy compression artifacts that are showing in your
diagram. For any kind of non-continuous-tone images such as maps,
schematic diagrams, architectural diagrams, line art, etc, that use a
limited palette of colors, the proper web-friendly formats are either GIF
or PNG.
2) What you are striving for is not a "multimode tracker" but a
full-function APRS station that happens to be mobile. The
commonly-accepted usage of the term "Tracker" is for a dumb (or should I
actually say deaf") transmit-only mobile that spews out posits
periodically and can't receive anything.
3) The "GPS splitter" linked in your original post is nothing really.
It's just three DB-9/DE-9 series connectors wired in parallel. There are
no active electronics inside. The critical issue is whether only ONE of
the connectors has it's TX data line connected. Since RS-232 outputs are
low impedance and RS-232 inputs are relatively high impedance, it is no
problem to have one output (the GPS) feeding two or more inputs (the Tiny
Track and a PC) in parallel. You just don't want twoRS-232 OUTPUTs wired
in parallel.
4) By far the simplest and tidiest way to do this is with a Kenwood D700
or TH-D7 which will do all of this automatically. You connect the GPS
receiver to a dedicated GPS port on the Kenwood and then connect the
radio's main serial port to the PC. When these radios are operated in
standalone (i.e. without a PC) "APRS" mode, they send posits from the GPS,
and SEND and RECEIVE data (messages, bulletins, posits) and display them
on it's control head screen.
When the Kenwoods are placed in "TNC" mode, they automatically forward GPS
data from the dedicated GPS port out the main serial port, along with
off-air receive data from the TNC. APRS-specific programs on the PC
like UIview, APRSplus or APRSpoint generate maps showing both other
stations posits from off-air reception, and your OWN position from your
local GPS. Additionally, UIview can optionally forward the received GPS
data out a virtual (simulated) 2nd serial port for use by an external
"civilian" mapping program like Streets & Trips or Delorme Street Atlas at
the same time!
3) Either the PacCom or a Kantronics KPC3+ can create the same effect for
a non-Kenwood radio, i.e. the GPS pass-through function that can share a
single serial port connection to the PC for both TNC RX and GPS data, or
act as a standalone dumb tracker. (Both devices have the dedicated GPS
port with pass-though to the main serial port.) In standalone mode,
they are really dumb in that they transmit raw uncompressed NMEA strings as
they come out out of the GPS, instead of the highly compressed Mic-E
packets of the Kenwoods. (The 100-character-plus raw NMEA strings take
much more air time to transmit, and are significantly less likely to be
received successfully than the much shorter compressed Mic-E packets.)
The Elcom MicroTNC plug can also do this. The difference is that while it
accepts a serial GPS connection like the others, the main connection to the
PC is via USB. This is an advantage on today's "legacy-free" laptops that
lack serial ports (saves you having to screw around with USB-to-serial
cable "dongles"). It also reduces the mobile installation power cable
rat's nest since the USB TNC can draw it's operating power from the laptop
it is plugged into instead of needing a separate DC connection or wall
wart.
--
Stephen H. Smith wa8lmf (at) aol.com
EchoLink Node: 14400 [Think bottom of the 2M band]
Home Page: http://wa8lmf.com --OR-- http://wa8lmf.net
NEW! TNC Test CD
http://wa8lmf.net/TNCtest
JavAPRS Filter Port 14580 Guide
http://wa8lmf.net/aprs/JAVaprsFilters.htm
"APRS 101" Explanation of APRS Path Selection & Digipeating
http://wa8lmf.net/DigiPaths
Updated "Rev G" APRS http://wa8lmf.net/aprs
Symbols Set for UI-View,
UIpoint and APRSplus:
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