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Sébastien Lorquet squalyl at gmail.comI don't see a huge problem here. Why not just parse whatever message with interesting info we get? if (!strcmp("$GPGLL") { // extract coordinates and update buffer } else if(!strcmp("$GPGGA)) { // extract coordinates and update buffer } else if(!strcmp("$GPRMC)) { // extract coordinates and update buffer } else if(!strcmp("$GPSuperProprietaryMessageWithAwesomePrecisionData")) { // extract coordinates and update buffer } else { // no luck with this message return; } Sebastien On Mon, Jan 31, 2011 at 4:28 PM, <mad at auth.se> wrote: > On Mon, 31 Jan 2011 13:34:16 +0100, Dario Lombardo wrote: >> >> Good, but why did you change the old code? Why don't you put something >> like >> >> if (strcmp("$GPGLL") { >> // run the old code >> } else if(strcmp("$GPGGA)) { >> // run your new code >> } else { >> return; >> } >> >> That could support both the devices. > > BTW, best practice would be to implement parsing of the "GPRMC"-sentence as > it > is the "Recommended Minimal Sentence" for every NMEA-capable gps receiver. > It contains time, date, latitude, longitude, validity, speed and heading, so > everything needed is delivered and should work with all receivers out there. > > Regards, > Mad > > >