By the way, if you wish to test against other talkers without purchasing a new receiver, I was running 'ShareGPS' on my Android phone on to my LAN. https://play.google.com/store/apps/details?id=com.jillybunch.shareGPS&hl=en I use the software from https://www.u-blox.com/ to decode and present it. https://www.u-blox.com/en/product/u-center-windows
Maybe most the receivers supply one set of sentences or another; I don't know. The phone makes things a bit more confusing when considering which talker to listen to. APRSIS32 is adapting to these options. Best regards, Fred N7FMH -----Original Message----- From: Xastir [mailto:[email protected]] On Behalf Of Fred Hillhouse Sent: Friday, July 21, 2017 10:26 AM To: 'Xastir - APRS client software discussion' Subject: Re: [Xastir] GPS NMEA sentences decoded by Xastir The assumption with most APRS software is there will only be a GP talker connected outputting only GP types. Other NMEA talkers have always been around but only one is supported. Now with alternate constellations (GLONASS and BD) maybe is time to include other talker types? At least it is something to consider at some point. Aside from the previous three, on a sailboat there may be instrumentation that uses II (integrated instruments). Maybe Raytheon (WAG)? Giuseppe is using a NMEA system that outputs II types. I suspect this may be typical of nautical systems but I do not know. This is just one second from my receiver: 14:09:46 $GPGGA,140946.0,4229.103717,N,07116.334517,W,1,04,1.1,92.2,M,-33.0,M,,*58 14:09:46 $GNGNS,140946.0,4229.103717,N,07116.334517,W,AA,08,1.1,92.2,-33.0,,*60 14:09:46 $GPVTG,248.4,T,248.4,M,0.0,N,0.0,K,A*23 14:09:46 $GPGSA,A,2,01,09,11,28,,,,,,,,,1.4,1.1,0.9*3D 14:09:46 $GNGSA,A,2,01,09,11,28,,,,,,,,,1.4,1.1,0.9*23 14:09:46 $GNGSA,A,2,75,83,84,85,,,,,,,,,1.4,1.1,0.9*29 14:09:46 $BDGSA,A,2,,,,,,,,,,,,,1.4,1.1,0.9*2E 14:09:46 $GPRMC,140946.0,A,4229.103717,N,07116.334517,W,0.0,248.4,210717,0.0,E,A*19 14:09:46 $GPGSV,4,1,13,01,22,164,22,07,73,258,17,08,68,046,16,09,13,217,28*70 14:09:46 $GPGSV,4,2,13,11,47,171,40,28,21,285,23,46,,,31,51,,,34*79 14:09:46 $GPGSV,4,3,13,13,01,333,,16,12,088,,23,,,,27,31,049,*43 14:09:46 $GPGSV,4,4,13,30,41,306,*48 14:09:46 $GLGSV,3,1,10,74,61,338,15,,,,32,73,49,113,20,75,11,316,18*58 14:09:46 $GLGSV,3,2,10,65,02,302,14,84,71,185,26,83,45,036,22,85,17,205,30*62 14:09:46 $GLGSV,3,3,10,66,02,354,,80,03,129,*65 Best regards, Fred N7FMH -----Original Message----- From: Xastir [mailto:[email protected]] On Behalf Of Jason KG4WSV Sent: Friday, July 21, 2017 9:53 AM To: Xastir - APRS client software discussion Subject: Re: [Xastir] GPS NMEA sentences decoded by Xastir On Thu, Jul 20, 2017 at 11:33 PM, Menga <[email protected]> wrote: > I noted in the file gps.c of the Xastir sources two problems in the > decoding of GPS NMEA sentences: only two types of sentences are > decoded $GPRMC and $GPGGA, Those two sentences are part of the standard, they are provided by practically all consumer devices, and they are sufficient to provide xastir with position, course, speed, and other data needed for an APRS location packet. > no checksum is tested. that's maybe a bit sub-optimal, but for most installations of xastir it would be vanishingly rare for an error detectable by a checksum to occur. > GPS devices have many different preambles, just in my case $IIRMC and > $IIGGA, II stands for integrated instruments, but there are many > others that are banned from Xastir. They aren't "banned", they simply are not supported. What sort of device is providing II sentences and, I assume from your question, does not provide GP sentences? Have you experienced errors that would have been detected by checksum verification? -Jason kg4wsv _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
