Dan, Same question I asked Ed - have you actually tried that and got it to work? I have been unable to get the 2820 to accept serial GPS data in place of the built-in GPS (not to mention that turning off the GPS in the 2820 also turns off the radio's GPS functionality - you can't even access the GPS displays). NMEA strings sent to the radio's serial port are treated exactly the same as any other serial data, and transmitted over the air as low speed data.
If you are able to make this work, I'm interested in knowing how. Brian VE7NGR On Sun, 2010-02-21 at 00:55 -0500, Daniel G. Thompson wrote: > > > Now, if you just want the radio to think it knows where it's at, that > is fairly easy. Simply get any pic project board with a serial port on > it and set the port to whatever speed the data needs to be ( I forget > what the 2820 wants when you send in GPS strings to the back of > the radio) and have it send a formated "what appears" to be output > from a GPS. The biggest problem will be something that keeps close > enough time to not munge things up. Turn off the GPS in the 2820, > and I can't recall for sure if you have to feed the data into the back > or the front of the radio, but you can certainly feed it into one of > those > ports. > > If you are feeling very wealthy and have plenty of realestate, use > a computer to send the data string. A small app to send this > information > for either Windows or Linux would not be all that hard to write. > > Dan Thompson > d...@waycom.com > > ----- Original Message ----- > From: "Jim Kvochick" <k...@att.net> > To: <dstar_digital@yahoogroups.com> > Sent: Saturday, February 20, 2010 10:24 AM > Subject: RE: [DSTAR_DIGITAL] Fooling the GPS firmware in an IC2820 to > display position data without a GPS sig > > > Sadly, the radio is buried in a reinforced concrete bunker, and we > have > > limited feedline access to the outside world. This makes using the > GPS > > antenna "not attractive". > > > > Thanks for the comments! > > > > Jim WB8AZP > > > > > > > > >
