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[aprssig] Quick and dirty weather

Scott Miller scott at opentrac.org
Mon Apr 18 17:59:19 UTC 2005


Did you see the new firmware I posted last night?  Should do what you want.

Scott

----- Original Message ----- 
From: "Ryan Tourge" <k2rrt.lists at gmail.com>
To: "'TAPR APRS Mailing List'" <aprssig at lists.tapr.org>
Sent: Friday, April 15, 2005 9:55 AM
Subject: RE: [aprssig] Quick and dirty weather


> Did you see the post about inverting Cd in the code? That's how I'm
running
> my TinyTrak and for the opentracker I had to add an external inverter. It
> would be easier to just select that function in the software and make for
a
> smaller physical package.
>
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]
> On Behalf Of scott at opentrac.org
> Sent: Friday, April 15, 2005 12:53 PM
> To: 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] Quick and dirty weather
>
> The OpenTracker will poll the sensors it expects to find in the AAG
station.
> If it's missing any, it just doesn't report that data.  You could put just
a
> DS18S20 sensor on the bus, for example, and it'll only report temperature.
> Of course, it'll do that if you don't plug anything in at all, but the
> on-board sensor isn't as accurate.
>
> It doesn't support any other sensors than the ones that come with the AAG
> station so far.  It won't poll a humidity sensor or barometer, for
example.
> I'll work on those when I get time.  When you add more than one of the
same
> sensor type to the bus, things get more complicated because you've got to
> uniquely identify each sensor.  If there's just one, it can identify it by
> type.
>
> Scott, N1VG
> http://n1vg.net/opentracker
>
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org
> [mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Ryan Tourge
> Sent: Friday, April 15, 2005 9:41 AM
> To: 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] Quick and dirty weather
>
>
> Do you think this could be done with separate 1-wire sensors or does it
have
> to be a davis/aag station?
>
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]
> On Behalf Of Scott Miller
> Sent: Friday, April 15, 2005 12:29 PM
> To: TAPR APRS Special Interest Group
> Subject: [aprssig] Quick and dirty weather
>
> I've been running a 1-wire station off an OpenTracker off and on for a
while
> at my house, testing out solar charging setups and such.  Decided I wanted
> to make it a permanent installation, but didn't want to devote another
> antenna, radio, and power supply to the effort.
>
> What I wound up doing was plugging a DB9 Y cable between the KPC-3 on my
> IGate and the radio cable.  Jumpered the KPC-3 for external power, clipped
> the PTT diodes on the tracker so it'd play nice, and plugged it in to the
> other side of the Y.  Now they both use the same radio, and the KPC-3
powers
> the OpenTracker without any extra wiring.  A few obvious deficiencies come
> to mind:
>
> 1. No collision avoidance between the two
> 2. OpenTracker can't run open squelch
> 3. IGate can't hear the tracker
>
> Number 1 isn't a big deal, since they both transmit infrequently.  Number
2
> is annoying, but my IGate hears 99% of its traffic from a couple of WIDEs
> and they've got long enough TXDs and strong enough signals that running
open
> squelch doesn't really help anything.  And as for number 3, it's running a
> single-hop path, so the IGate hears the packet as it comes back from the
> digipeater.
>
> It's quick and dirty, but it's simple and it works.  Just a Y cable,
> OpenTracker, 1-wire cable, and weather sensor unit.  I don't think this is
> what Kantronics intended when they put in the external power jumper, but
it
> works.
>
> http://www.findu.com/cgi-bin/wxpage.cgi?call=N1VG-2&last=12
>
> Scott, N1VG
> http://n1vg.net/opentracker
>
>
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