[FOSS-GPS] Ublox M8T, unable to receive data

Wed Mar 2 06:54:29 PST 2016

> If you could be more specific with what you would like to do etc and
> what you are battling with give me a shout and I will try and help

Dear Anton,

I am using one Ublox M8T with integrated antenna under GNU/Linux. At
first, I would like to find the exact position of the receiver, for
learning purpose.

My configuration file is:
# standalone. for NTRIP set  type and path. yours are off
inpstr1-type       =serial     # serial
inpstr2-type       =off        # off || ntripcli
inpstr3-type       =off        # off || ntripcli
# verified with minicom
inpstr1-path       =ttyACM0:57600:8:n:1:off
inpstr2-path       =
inpstr3-path       =
# here path and permissions
misc-startcmd      =gcc/rtkstart.sh
misc-stopcmd       =gcc/rtkshut.sh
file-cmdfile1      =../../data/ubx_raw_1hz.cmd
file-cmdfile2      =../../data/ubx_raw_1hz.cmd

rtkrcv -o ublox.conf
and then start

Nothing happens!
no error is reported.

On the converse, if I apt-get install gpsd and run xgps I can see the
constellation of satellites. So my hardware is working. As gpsd starts
automatically, I simple remove it.

I can also run minicom -D /dev/ttyACM0 and see the log file. Speed is
correct. Here is some output:

How can I start receiving raw data in rtkrcv? Should I run 
stty raw < /dev/ttyACM0 to be able to read /dev/ttyACM0.

I have to admit I am lost ...

Kind regards,
Jean-Michel

================================
Here is an output of the raw data:

stty raw < /dev/ttyACM0
cat /dev/ttyACM0 
$GNRMC,145302.00,A,4936.67778,N,00306.20591,E,0.003,,020316,,,A*61
$GNVTG,,T,,M,0.003,N,0.006,K,A*38
$GNGGA,145302.00,4936.67778,N,00306.20591,E,1,12,0.76,98.1,M,46.1,M,,*7
9
$GNGSA,A,3,18,15,28,20,24,12,13,19,,,,,1.41,0.76,1.19*1A
$GNGSA,A,3,73,71,74,70,81,,,,,,,,1.41,0.76,1.19*1F
$GPGSV,3,1,11,10,18,320,,11,00,024,,12,22,212,29,13,47,139,27*72
$GPGSV,3,2,11,15,75,227,26,17,31,092,26,18,30,286,19,19,21,127,09*7E
$GPGSV,3,3,11,20,20,219,26,24,53,278,20,28,33,050,26*43
$GLGSV,3,1,09,70,23,187,26,71,58,242,33,72,35,320,22,73,70,301,27*6B
$GLGSV,3,2,09,74,23,258,28,80,44,050,,81,17,025,32,82,23,076,10*65
$GLGSV,3,3,09,83,03,126,*51
$GNGLL,4936.67778,N,00306.20591,E,145302.00,A,A*7D
$GNZDA,145302.00,02,03,2016,00,00*7D
$GNTXT,01,01,02,u-blox AG - www.u-blox.com*4E
$GNTXT,01,01,02,HW UBX-M80xx 00080000 *43
$GNTXT,01,01,02,EXT CORE 2.30 (93796) Apr  8 2015 15:53:38*59
$GNTXT,01,01,02,ROM BASE 2.01 (75331) Oct 29 2013 13:28:17*44
$GNTXT,01,01,02,MOD NEO-M8T-0*60
$GNTXT,01,01,02,PROTVER 17.00*03
$GNTXT,01,01,02,GNSS OTP:  GPS GLO, SEL:  GPS GLO*67
$GNTXT,01,01,02,TIM RAW 1.02*5A
$GNTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*3E
$GNTXT,01,01,02,ANTSTATUS=OK*25
$GNTXT,01,01,02,FIS 0xEF4015 (79189) found*2D
$GNTXT,01,01,02,LLC FFFFFFFF-FFFFFFED-FFFFFFFF-FFFFFFAE-FFFFFF69*3A
$GNRMC,145303.00,A,4936.67777,N,00306.20591,E,0.003,,020316,,,A*6F
$GNVTG,,T,,M,0.003,N,0.006,K,A*38
$GNGGA,145303.00,4936.67777,N,00306.20591,E,1,12,0.86,98.0,M,46.1,M,,*7
9
$GNGSA,A,3,18,15,28,20,24,12,13,19,,,,,1.48,0.86,1.21*17
$GNGSA,A,3,73,71,74,70,81,,,,,,,,1.48,0.86,1.21*12
$GPGSV,3,1,11,10,18,320,,11,00,024,,12,22,212,31,13,47,139,28*74
$GPGSV,3,2,11,15,75,227,27,17,31,092,27,18,30,286,19,19,21,127,12*74
$GPGSV,3,3,11,20,20,219,26,24,53,278,19,28,33,050,26*49
$GLGSV,3,1,09,70,23,187,26,71,58,242,33,72,35,320,22,73,70,301,26*6A
$GLGSV,3,2,09,74,23,258,28,80,44,050,,81,17,025,32,82,23,076,09*6D
$GLGSV,3,3,09,83,03,126,*51
$GNGLL,4936.67777,N,00306.20591,E,145303.00,A,A*73
$GNZDA,145303.00,02,03,2016,00,00*7C
$GNRMC,145304.00,A,4936.67776,N,00306.20593,E,0.003,,020316,,,A*6B
$GNVTG,,T,,M,0.003,N,0.006,K,A*38
$GNGGA,145304.00,4936.67776,N,00306.20593,E,1,12,0.73,98.1,M,46.1,M,,*7
6
$GNGSA,A,3,18,15,28,20,24,12,13,19,,,,,1.38,0.73,1.18*10
$GNGSA,A,3,73,71,74,70,81,82,,,,,,,1.38,0.73,1.18*1F
$GPGSV,3,1,11,10,18,320,,11,00,024,,12,22,212,30,13,47,139,27*7A
$GPGSV,3,2,11,15,75,227,25,17,31,092,27,18,30,286,20,19,21,127,12*7C
$GPGSV,3,3,11,20,19,218,26,24,53,278,19,28,33,050,26*42
$GLGSV,3,1,09,70,23,187,26,71,58,242,32,72,35,320,22,73,70,301,26*6B
$GLGSV,3,2,09,74,23,258,28,80,44,050,,81,17,025,32,82,23,076,10*65
$GLGSV,3,3,09,83,03,126,*51
$GNGLL,4936.67776,N,00306.20593,E,145304.00,A,A*77
$GNZDA,145304.00,02,03,2016,00,00*7B
$GNRMC,145305.00,A,4936.67776,N,00306.20594,E,0.004,,020316,,,A*6A
$GNVTG,,T,,M,0.004,N,0.007,K,A*3E
$GNGGA,145305.00,4936.67776,N,00306.20594,E,1,12,0.73,98.1,M,46.1,M,,*7
0
$GNGSA,A,3,18,15,28,20,24,12,13,19,,,,,1.38,0.73,1.18*10
$GNGSA,A,3,73,71,74,70,81,82,,,,,,,1.38,0.73,1.18*1F
$GPGSV,3,1,11,10,18,320,,11,00,024,,12,22,212,29,13,47,139,27*72
$GPGSV,3,2,11,15,75,227,25,17,31,092,26,18,30,286,20,19,21,127,10*7F
$GPGSV,3,3,11,20,19,218,25,24,53,278,18,28,33,050,25*43
$GLGSV,3,1,09,70,23,187,25,71,58,242,32,72,35,320,22,73,70,301,26*68
$GLGSV,3,2,09,74,23,258,29,80,44,050,,81,17,025,32,82,23,076,12*66
$GLGSV,3,3,09,83,03,126,*51
$GNGLL,4936.67776,N,00306.20594,E,145305.00,A,A*71
$GNZDA,145305.00,02,03,2016,00,00*7A