$PGRMW is a supplemental sentence - the waypoint creation is still done through the $GPWPL sentence. Every time the T2 sends a waypoint, it does both. Plus a few others if you've got them enabled.
Scott Barry L. Lankford wrote: > > > Scott Miller wrote: > > That's right. Works very well. > > > > Scott > > > Scott, > > I'm confused about how this works. As I read the info in the Garmin blog > link given in the original post, you can only use the $PGRMW sentence to > update the altitude, symbol and comment of an already existing waypoint. > Unless I've missed something, it does not say you can update the latitude > and longitude, and the Garmin proprietary NMEA document seems to confirm > that. So, how can you "move" an existing waypoints with the $PGRMW > sentence without creating duplicates? > > Also, unless you can use the $PGRMW sentence to create new waypoints as > well as update existing ones, that would seem to indicate that to use the > $PGRMW sentence in a tracker would require you to maintain a list of > already created waypoints in the tracker's memory (so you'd know whether to > send an initial $GPWPL or a modifying $PGRMW), and I doubt even recent > trackers have that much memory to spare. So, how does that work? > > Is the lat/long update capability only available with the Oregon and > Colorado series? I have a vague recollection that the $PGRMW sentence may > have been extended to include lat and long in those units, but I haven't > been able to locate any posts on any of the forums I read, or any Garmin > documents, to confirm that. > > Barry N4MSJ > > > Edward wrote: > >> > >> > >> Is it true that you wont get the duplicate waypoints? > >> > >> --- In [email protected] <mailto:tracker2%40yahoogroups.com>, > >> Scott Miller <sc...@...> wrote: > >> > > >> > I think the Garmin blog covers most of it. $PGRMW support has been > >> > there in the Tracker2 since slightly before Garmin rolled out the > >> > firmware update. You'll need to buy one of their serial interface > >> > cables, unless you want to build your own with a voltage regulator and > >> > level shifter. > >> > > >> > Scott > >> > > >> > Edward wrote: > >> > > > >> > > > >> > > I saw this recently on the Garmin website and don't know quite > what to > >> > > make of it. They seem to say they have APRS compatible units. I > >> searched > >> > > the forum but didn't see any mention of it. > >> > > > >> > > http://garmin.blogs.com/softwareupdates/2009/06/index.html > <http://garmin.blogs.com/softwareupdates/2009/06/index.html> > >> <http://garmin.blogs.com/softwareupdates/2009/06/index.html > <http://garmin.blogs.com/softwareupdates/2009/06/index.html>> > >> > > <http://garmin.blogs.com/softwareupdates/2009/06/index.html > <http://garmin.blogs.com/softwareupdates/2009/06/index.html> > >> <http://garmin.blogs.com/softwareupdates/2009/06/index.html > <http://garmin.blogs.com/softwareupdates/2009/06/index.html>>> > >> > > > >> > > Ed > >> > > KE7MWY > >> > > > >> > > > >> > > >
