[aprssig] Fw: APRS-B?

Andrew P. andrewemt at hotmail.com
Tue Jun 25 08:30:27 CDT 2013


Oops. Hit "Reply" instead of "Reply All". See below.

Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: "Andrew Pavlin" <AndrewEMT at hotmail.com>
Date: Tue, 25 Jun 2013 13:29:55 
To: PE1RDW<aprs at pe1rdw.demon.nl>
Reply-To: AndrewEMT at hotmail.com
Subject: Re: [aprssig] APRS-B?

And there's already at least one APRS client program that supports OpenTRAC, which is my YAAC program ("Yet Another APRS Client"). <shameless plug>

I'm fixing a few bugs in the OpenTRAC support in the upcoming build 26. 

Would there be interest in a protocol-translating OpenTRAC-to-APRS digipeater (working both ways)?

Andrew Pavlin, KA2DDO
author of YAAC
http://www.ka2ddo.org/ka2ddo/YAAC.html
Sent from my Verizon Wireless BlackBerry

-----Original Message-----
From: PE1RDW <aprs at pe1rdw.demon.nl>
Date: Tue, 25 Jun 2013 13:23:21 
To: <aprssig at tapr.org>
Subject: Re: [aprssig] APRS-B?


Sounds like you want to use the opentrac protocol http://opentrac.org
 
 -- 
 73 Andre PE1RDW
 
 On Tue, 25 Jun 2013 11:48:24 +0200, Andrew Rich <vk4tec at tech-software.net>  
 wrote:
 
 > My dream is to have 19k2 400 MHz
 >
 > Manchester encoded
 >
 > Then each message has defined message types
 >
 > 00 - General ident
 > 01 - Position report
 > 02 - GPS info
 > 03 - Velocity info
 > 04 -
 >
 > 99 - Reserved emergency
 >
 > - Andrew -
 >
 > -----Original Message-----
 > From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On  
 > Behalf Of Scott Miller
 > Sent: Tuesday, June 25, 2013 8:01 AM
 > To: TAPR APRS Mailing List
 > Subject: Re: [aprssig] APRS-B?
 >
 > I think the RFM12B code for the OTUSB is already published to SVN.  I
 > don't mind sharing that at all.  I don't remember what's different about
 > the RFM22 modules, but I'd prefer to stick with whatever is most  
 > flexible.
 >
 > Scott
 > N1VG
 >
 > On 6/24/2013 2:31 PM, John Wiseman wrote:
 >> I posted a message about 6 months ago about experiments with the RFM22B
 >> (100 mW) and RFM23BP (1 Watt modules). I also obtained a couple of the
 >> RFM12B (500 mw) units, but I found the interface much more difficult,
 >> and would recommend the 22/23 modules. I made a board for the Raspberry
 >> PI, and it seemed to work pretty well. and at $25 seems reasonable, but
 >> for a simple dig function the code could probalby run on the PIC.
 >> As I do a lot of sailing in the summer, the project has been put on hold
 >> till the Autumn, but if anyone is interested in preogressing the ideas,
 >> I can publish the board design and code.
 >> To save you trawling throught the archive, I'vr repeated the message  
 >> below.
 >> 73, John G8BPQ
 >>
 >> A while ago (22 September) Bob posted a message about the RFM22 modules.
 >> I was working on a TNC for the Raspberry PI at the time, so decided to
 >> try building a TNC round these modules. There is a photo of the result  
 >> here
 >>
 >> _https://dl.dropbox.com/u/31910649/RMF22BTNC.png_
 >>
 >> The board is the same size as the PI (about the same as a credit card).
 >> This one is fitted with the RFM22B module, with 100 mW output, but the
 >> board will also take the 1 Watt RFM23BP. Although designed to work with
 >> the PI, it also has a header for a serial to USB converter, so it can be
 >> used as a standalone KISS TNC.
 >>
 >> To test as a tracker I lashed up a board to connect the Adafruit
 >> Ultimate GPS Breakout board. Photo here:
 >>
 >> _https://dl.dropbox.com/u/31910649/S1360001.jpg_
 >>
 >> I've now got them running, and just completed my first tests. On the
 >> first trial with the 100mW version I achieved a range of just under a
 >> mile, with a
 >>
 >> 5/8 over 5/8 70cms whip on the car, and a far from ideal Marine Band
 >> whip at base (The 70 cms colinear I bought for the test turned out to
 >> have an infinite SWR!).
 >>
 >> Although very much a work in progress, I thought I'd share results so
 >> far - if anyone else is working with these modules I'd be interested to
 >> hear from them.
 >>
 >> BTW, the GPS module is pretty neat as well - it is about an inch square,
 >> and includes a data logger - _https://www.adafruit.com/products/746_
 >>
 >> 73, John G8BPQ
 >>
 >> ?
 >>
 >>
 >> ------------------------------------------------------------------------
 >> *From:* aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] *On
 >> Behalf Of *Robert Bruninga
 >> *Sent:* 24 June 2013 13:55
 >> *To:* aprssig at tapr.org
 >> *Subject:* [aprssig] APRS-B?
 >>
 >> I'm impressed with the 500 mw transceivers on 433 MHz costing $20 or so
 >> and operating at 9600 baud.
 >>
 >> Why don't we call this APRS-B (plan B).  And start paralleling our
 >> network with these devices.
 >>
 >> Then instead of only 5% of hams having APRS capability, we could get
 >> more people in the clubs to own a device and also to put one up at home
 >> so we have a backup data channel as well?
 >>
 >> Maybe lots of you are doing this alrady and I am the last one to the
 >> party.  But whatever we do, lets standardize on something so we are all
 >> headed in the same direction.
 >>
 >> These are wideband devices, so they are not compatible with any existing
 >> APRS or other ham FM radios.  That is why it is a fresh start.  What is
 >> the sync and key up time?
 >>
 >> Sure the range of 500mw is small, but at only 10% of the cost of a digi
 >> we can put them at more and closer places and even solar power them.
 >>
 >> Bob, WB4APR
 >>
 >>
 >>
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