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ZL3AI > APRDIG 12.10.03 01:43l 232 Lines 9516 Bytes #999 (0) @ WW
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From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
TAPR APRS Special Interest Group Digest for Thursday, October 09, 2003.
1. APRS Traffic Graph Linear Regression
2. Re: DigiTraveler to PalmIIIxe
3. Re: Open-Source TNC anyone?
4. Linux-based packet appliance survey
5. Re: Linux-based packet appliance survey
6. Re: Linux-based packet appliance survey
7. Re: DigiTraveler to PalmIIIxe
8. Re: Open-Source TNC anyone?
9. Re: Linux-based packet appliance survey
10. Re: Linux-based packet appliance survey
11. RE: Linux-based packet appliance survey
12. Re: Linux-based packet appliance survey
13. RE: Linux-based packet appliance survey
14. Re: DigiTraveler to PalmIIIxe
15. Re: Re: Linux-based packet appliance survey
16. Re: DigiTraveler to PalmIIIxe
17. Re: DigiTraveler to PalmIIIxe
18. Re: DigiTraveler to PalmIIIxe
19. Re: DigiTraveler to PalmIIIxe
20. Re: DigiTraveler to PalmIIIxe
21. Re: DigiTraveler to PalmIIIxe
22. Re: DigiTraveler to PalmIIIxe
23. Re: Open-Source TNC anyone?
24. Re: Open-Source TNC anyone?
25. Re: DigiTraveler to PalmIIIxe
26. Re: DigiTraveler to PalmIIIxe
27. Re: DigiTraveler to PalmIIIxe
28. PCsat NODIGI
29. Re: DigiTraveler to PalmIIIxe
30. drsi anyone?
31. Re: Open-Source TNC anyone?
32. Re: DigiTraveler to PalmIIIxe
33. Re: Linux-based packet appliance survey
34. Re: Dwait Hacks kill APRS
35. Re: Linux-based packet appliance survey
36. Re: Linux-based packet appliance survey
37. Re: Re: 9600 user data - Digi_Ned 3rd Party
38. Re: Linux-based packet appliance survey
39. Re: DigiTraveler to PalmIIIxe
40. Re: drsi anyone?
41. Re: DigiTraveler to PalmIIIxe
42. TM-V7A and 9600 baud packet... Anyone?
43. Re: TM-V7A and 9600 baud packet... Anyone?
44. Re: Dwait Hacks kill APRS
45. Re: Dwait Hacks kill APRS
46. Re: Dwait Hacks kill APRS
47. Re: Dwait Hacks kill APRS
48. Tweak your TNC
49. Re: Tweak your TNC
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Subject: APRS Traffic Graph Linear Regression
From: "Andrew Rich" <vk4tec@hotmail.com>
Date: Thu, 09 Oct 2003 14:07:14 +1000
X-Message-Number: 1
Howdy,
I am trying to add a trend line or what is known as a linear regression to
an APRS stats graph.
Has anybody done such a thing before ?
PERL or PHP
Cheers Andy VK4TEC
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Subject: Re: DigiTraveler to PalmIIIxe
From: Dale Blanchard <wa7ixk@earthlink.net>
Date: Wed, 08 Oct 2003 21:47:26 -0700
X-Message-Number: 2
I did not find any jumpers on the cable I cut off. Did not check all of
them. My D-7a turns it on ok. My Palm IIIxe turns it on ,but the max you
can set the Palm to stay on is 3 minutes. I put a jumper in the tiny
trak to turn it on when power is applied. I lifted the positive leg of
the diode bridge and wired in a 100 ma 5 volt regulator, so now it runs
on 12 volts. Little tricky getting in in there. The power plug does not
seem to disconnect the batteries. Got to recheck that.
Robbie wrote:
>Hi all,
>
>Well, I thought I was in good shape. Using pins 2, 3 and 5 on the DB-9
>does not seem to get it done.. I am beginning to believe there needs
>to be CTS-RTS jumpered or something else..
>
>The GPS works into the Kenwoods.. Works into normal mapping programs
>using the RS-232. The PalmIIIxe turns on the GPS, but after about 2
>minutes or less, (outside clear view), it complains about NO GPS...
>All three of the cables that I cut the PDA end off, has one form of
>jumper or another, but still only the 3 wires going into the RJ
>connector for the GPS..
>
>Reversing pins 2 and 3 will not allow the receiver to "turn on".
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Subject: Re: Open-Source TNC anyone?
From: "Scott Miller" <scott@3xf.com>
Date: Wed, 8 Oct 2003 22:31:32 -0700
X-Message-Number: 3
>I thought about doing that. Running industrial type PC hardware with
>embedded Linux. Hang a few Baycom-style modems off serial ports. One of
Got my net4501 up and running today. I've found that I can fit a fairly
capable Debian install in about 100 megs - with the 128 meg flash card I'm
using now that gives me plenty of room left over for logs and temp space.
Of course, it's a lot more than you actually need to run a digi/igate - I'm
sure all of that would fit on a 16 meg card with room to spare, but I like
having development and diagnostic tools available. Besides, a 128 meg card
can be found for under $30, and a 256 for under $50.
>the big issues has been cost of the hardware. I have a few 486DX133
>embedded boards but we're talking US$300 without any I/O and a board that
>requires a PC/104 video card for initial setup. Since then there's the
>net4501, that you mentioned, and also a small embedded board from PC
>Engines (http://pcengines.ch/wrap.htm).
I'm really impressed with the Soekris serial BIOS. The unit's got no video
capability at all, but it does intercept BIOS video calls and sends them to
the serial port. The boot monitor interface reminds me a bit of the older
Sparcstations. In fact, this box is pretty much taking over the functions
I'd previously used Sparc IPX's for - at least as much processing power, but
far smaller and drawing 10 watts max.
>The question I have is, how well would it work to bit bang a Baycom-style
>modem on general purpose I/O on PC hardware?
Isn't that how it's done now? Shouldn't make much difference if you're
using a printer port or a general-purpose I/O port. What I'd really like to
see is a multiport packet modem PCI card that'd plug into the net4501 board
and fit in the stock metal case. For the moment, though, I'll probably just
hook up a traditional Baycom modem to the internal serial port. Or the
external port can plug into a KPC-3...
>I am also interested in supporting APRS tracker RX on a regular voice
>repeater. How can I get reliable packet data DCD off a Baycom-style modem?
>I've seen a few designs but they are all use 'secret' code.
The KPC-3's software DCD is pretty simple. It increments a counter by X
units every time a transition occurs at an expected bit boundary, and
decrements the counter by Y every time a transition occurs in the middle of
a bit. As soon as the counter exceeds a certain threshold, DCD is 'on'
until it drops back to zero. At least, that's how I understand it.
Scott
N1VG
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Subject: Linux-based packet appliance survey
From: "Scott Miller" <scott@3xf.com>
Date: Wed, 8 Oct 2003 22:59:20 -0700
X-Message-Number: 4
Setting aside for a moment the issue of modem hardware, what are your
thoughts on a 'Linux TNC'?
The Soekris unit I'm using is about twice the size of a KPC-3. It's totally
silent and draws 10 watts max. Board, case, power supply, and flash storage
will cost you about $250. You can probably have a complete system including
a couple of modem ports for no more than the cost of a 9612+.
This gets you the ability to run DIGI_NED for digipeating, APRSD for an
IGATE, BBS software, webserver, telnet, ftp, whatever. The basic unit
includes not one but three 10/100 Ethernet ports - properly configured it
could be plugged into your home network and connected to AGWPE to let you
use your favorite packet apps.
The down side is that it CAN be considerably more difficult to configure
than a regular TNC. My question is, how easy does it have to be before
you'd go with such a device over a TNC?
I could write a HOW-TO that would get a reasonably competent Linux user up
and running in an hour or two - but that assumes you're comfortable mounting
a flash device on another system, partitioning it, formatting it, extracting
the root filesystem, installing the bootloader, customizing your host and
network settings, and then installing and configuring the regular Linux
AX.25 services.
At the other end of the spectrum - you could buy a compactflash card with
everything pre-installed. When you install the card and boot up the first
time, the system presents a configuration menu that asks you for all of the
relevant information and automagically plugs it in to the right config
files. A 'novice' interface would hide the guts of the system from you,
while still leaving the advanced features available. Such a thing doesn't
exist at this point, to my knowledge, but it certainly could if someone put
some effort into it.
What level of complexity do you think the average digipeater operator is
willing to deal with?
Scott
N1VG
----------------------------------------------------------------------
Subject: Re: Linux-based packet appliance survey
From: "Gregg G. Wonderly" <gregg@skymaster.cytetech.com>
Date: Thu, 09 Oct 2003 02:02:11 -0500
X-Message-Number: 5
>The Soekris unit I'm using is about twice the size of a KPC-3. It's totally
>silent and draws 10 watts max. Board, case, power supply, and flash storage
>will cost you about $250. You can probably have a complete system including
>a couple of modem ports for no more than the cost of a 9612+.
It also has USB. Can it boot off of the USB? That would be more likely to be
used as a loading mechanism on more peoples computers I'd think. You could
put a boot image on a 128M or 256M pen drive, and then plug it and the compact
flash in and install onto the flash.
If the flash was not empty, there might be a race condition in the bios about
which drive is booted first.
-----
gregg@cytetech.com (Cyte Technologies Inc)
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