16487Re: [tracker2] GPS units that do not have duplicate waypoint issue?
- Apr 8 5:04 PMOn 4/8/2014 10:16 AM, Jason KG4WSV wrote:
> On Tue, Apr 8, 2014 at 6:36 AM, Barry Lankford <BarryL@...> wrote:I found some batteries, so was able to power my 76CS up and see what S/W I
>> Your GPSMAP60C probably *did* work correctly -- once upon a time. You
>> probably fell victim to "unnecessary upgrade temptation."
> Nope, been around computers _way_ too long for that. I don't upgrade
> firmware unless there's a bug that is causing a problem for me
was running. Then I couldn't remember how to display the firmware version,
so I eventually recalled that the Garmin has debug and diagnostic screens.
I brought up the diagnostic screen (see attachments), and I see that I'm
running ver.4.00, and I know for a fact that it moves duplicate waypoints
and does not leave a trail of renamed waypoints. BTW, there's also a
screen capture function, called "xImage," but it was easier to take a
direct photo of the screen with my tablet rather than dig through the dark
recesses of my brain to figure that out again. I also found I *do* still
have at least six of the firmware upgrade files from ver.3.60 to ver.4.20,
including the one for ver.4.00. As far as I can see, Garmin doesn't
mention the change in the way duplicate waypoints are dealt with in the
revision history. I can send you any and all of the files, but I'd rather
you determine for yourself that 76C files are the same as 60C files.
I found out through experiment that when a duplicate waypoint is received,
the only thing that gets changed is the location and altitude (and possibly
the date/time stamp). The symbol remains the same. So, you can pre-set a
symbol for an ARHAB balloon and multiple symbols for chase team members and
they will remain the same even when updated. You don't want to have a
large number of waypoints moving around as screen updates start to become
untenable. That's why I asked Scott and Byon a long time ago to include a
"filtercall" function in their trackers that receive and decode posits. I
eventually wrote a PalmOS program to do that.
>> PS, I thought the 60C/76C series *did* speak PGRMW.I also made up a set of custom symbols, mostly ham-related. IIRC the same
> I thought so, too. I thought I loaded Scott's custom symbol set to it
> and everything (back before I killed my T2 hacking around on it). It
> is entirely possible that I switched to garmin binary mode to
> accomplish this, though...
program that does screen captures also up- & down-loads symbols.
I also have the official Garmin I/O Software Development Kit, as well as
documents for Garmin NMEA sentences, Garmin Proprietary NMEA sentences and
Garmin Proprietary Binary protocol (USB and EIA232). The latter was
completely unexpected when they released it. Until then, the only thing
available for the binary protocol was a couple of reverse-engineered documents.
>> Are you certain itIt turns out the User Manuals for the Garmin GPSes tell what NMEA sentences
> Nope, but it honored all the other NMEA sentences I sent to it.
they use (in an appendix), including the proprietary NMEA ones. The 76C
does use "some" PGRMx sentences, but PGRMW isn't one of them.
> -JasonI don't recall how this forum handles attachments, so I'll also address
this to your direct email. I can also send the other documents I mentioned.
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