Hello, The GLLIN sends NMEA sentences to named pipe "/tmp/nmeaNP". The OMGUI uses this output to plot positions, satellite strength, etc. on various OMGUI test panels. Close your handle to /tmp/nmeaNP to stop the GLLIN (if it was opened with "-np" option).
Below is a typical NMEA output sequence from the GTA01 showing the position (RMC,GGA), time (UTC format) (RMC,GGA), satellites used (GSA), satellites tracked (GSV), satellite signal strength (GSV), and satellite position (GSV), type of fix (GSA), and various other details (GGA especially has lots of miscellaneous information). Google "NMEA" and you'll find excellent tutorials about NMEA. (Be sure not to type too fast and end up with "NEMA" which, among other things, is a medical-imaging file exchange standard.) $GPGGA,230648.00,3716.309458,N,12156.790892,W,1,07,0.5,040.0,M,-0.537000 ,M,0.0130515,0130*7C $GPRMC,230648.00,A,3716.309458,N,12156.790892,W,005.9,188.0,060607,,,A*4 1 $GPGSV,2,1,08,23,69,004,37,20,52,174,44,25,49,260,44,13,46,314,30*70 $GPGSV,2,2,08,16,42,064,35,04,14,292,34,01,12,096,30,27,25,250,16*77 $GPGSA,A,3,01,04,13,16,20,23,25,,,,,,1.1,0.5,1.0*32 $GPGGA,230649.00,3716.307825,N,12156.791167,W,1,07,0.5,040.0,M,-0.537000 ,M,0.0130515,0130*77 $GPRMC,230649.00,A,3716.307825,N,12156.791167,W,006.1,188.0,060607,,,A*4 1 $GPGSV,2,1,08,23,69,004,35,20,52,174,43,25,49,260,43,13,46,314,28*7B $GPGSV,2,2,08,16,42,064,35,04,14,292,34,01,12,096,28,27,25,250,27*7C $GPGSA,A,3,01,04,13,16,20,23,25,,,,,,1.1,0.5,1.0*32 The OpenMoko team will plug the GLLIN into the GPSD (see module omgui/gllin.cpp for sample GLLIN start/stop code to use as the basis for the GPSD). I hear the DBUS link planned for GPS information distribution beyond the GPSD multi-cast is done. TTFN Ken Yale -----Original Message----- From: Jonathon Suggs [mailto:[EMAIL PROTECTED] Sent: Monday, August 06, 2007 11:49 To: Krzysztof Kajkowski Cc: OpenMoko; openmoko-devel Subject: Re: GPS data from gllin Krzysztof Kajkowski wrote: > Hi! I want to ask phase0 developers: what is the format of gllin > output data? I am trying to convert it to google earth using gpsbabel > but I have no clue what i could be. Most possible guess is NMEA but > the error for my location is about half of the world ;))) so I guess > this is not it... > > best regards > > > cayco > > This doesn't answer your question, but can someone send a dump of a GPS session? Also, if an application is going to make use of GPS data, what is the preferred method to get the data? Directly from the device or is there some type of multicast protocol that you need to subscribe to?
