Good afternoon,
I’m testing this module for a new project in my company but I get some troubles during the setup of the gnss. I installed the latest release of the firmware (v3.7.2) to fix all previous bugs.
I use MangOH RED as demoboard with the PC connected to the UART1 of HL7800, through the IoT connector (1.8V level signals).
I configured the gnss receiver (following some examples found in the Sierra W. forum), but something goes wrong:
- Look at the following commands: the gnss gets a gps fix, but the command “at+gnssloc?” doesn’t give any values!
- Then I activated the print of the NMEA strings every 1 second and the DATA terminal (UART1) send the right gps fix, but after 10/20 seconds the strings stop to coming out and the entire system get blocked (the command “+++” doesn’t work). The only thing I can do, is to reset (HW reset) the module.
ATI3
BHL7800.3.7.2.3.20191030
OK
at+cmee=1
OK
at+cfun=0,0
OK
+CREG: 0
at+gnssconf=1,1
OK
at+gnssconf=10,1
OK
at+gnssnmea=4,1000,0,1
CONNECT
+++
OK
at+gnssstart=0
OK
+GNSSEV: 0,1
+GNSSEV: 1,1
+GNSSEV: 3,0
+GNSSEV: 3,3
at+gnssloc?
+GNSSLOC:
Latitude:
Longitude:
GpsTime:
FixType: 3D
HEPE:
Altitude:
AltUnc:
Direction:
HorSpeed:
VerSpeed:
OK
at+gnssnmea=4
CONNECT
$GPGGA,132343.00,4531.1196,N,00859.0285,E,1,08,1.7,125.3,M,48.1,M,*69
$GPGGA,132344.00,4531.1199,N,00859.0283,E,1,08,1.7,125.2,M,48.1,M,*66
$GPGGA,132345.00,4531.1202,N,00859.0281,E,1,08,1.7,125.4,M,48.1,M,*62
$GPGGA,132346.00,4531.1205,N,00859.0279,E,1,08,1.7,127.2,M,48.1,M,*65
$GPGGA,132347.00,4531.1207,N,00859.0276,E,1,08,1.7,129.1,M,48.1,M,*64
$GPGGA,132348.00,4531.1208,N,00859.0276,E,1,08,1.7,132.3,M,48.1,M,*6C
$GPGGA,132349.00,4531.1208,N,00859.0277,E,1,08,1.7,133.7,M,48.1,M,*69
$GPGGA,132350.00,4531.1209,N,00859.0282,E,1,07,1.9,134.5,M,48.1,M,*6E
$GPGGA,132351.00,4531.1210,N,00859.0283,E,1,08,1.7,135.9,M,48.1,M,*6A
$GPGGA,132352.00,4531.1210,N,00859.0283,E,1,08,1.7,137.3,M,48.1,M,*61
$GPGGA,132353.00,4531.1209,N,00859.0284,E,1,08,1.7,138.0,M,48.1,M,*63
$GPGGA,132354.00,4531.1210,N,00859.0284,E,1,08,1.7,139.6,M,48.1,M,*6B
$GPGGA,132355.00,4531.1210,N,00859.0284,E,1--------String stops!!--------
- I tried to launch “at+gnssstart=0” command before the “at+gnssnmea=4,1000,0,1” and the command “at+gnssloc?” seems to work fine.
- When I launch the command “at+gnssnmea=4,1000,0,1” after “at+gnssstart=0”, the module gives an error code and the command “at+gnssnmea=4,1000,0,1” doesn’t take effect.
- Also in this case, when I launch the command “at+gnssnmea=4”, the strings come out only for a few seconds, then stop.
at+cfun=0
OK
+CREG: 0
at+gnssconf=1,1
OK
at+gnssconf=10,1
OK
at+gnssstart=0
OK
+GNSSEV: 0,1
+GNSSEV: 1,1
+GNSSEV: 3,0
at+gnssloc?
+GNSSLOC:
FIX NOT AVAILABLE
OK
+GNSSEV: 3,3
at+gnssloc?
+GNSSLOC:
Latitude: 45 Deg 31 Min 6.89 Sec N
Longitude: 8 Deg 59 Min 0.55 Sec E
GpsTime:
FixType: 3D
HEPE: 0.20 m
Altitude: 40.000 m
AltUnc: 0.0 m
Direction:
HorSpeed:
VerSpeed:
OK
+GNSSEV: 3,0
at+gnssnmea=4,1000,0,1
+GNSSEV: 3,3
+CME ERROR: 60
at+gnssnmea=4
CONNECT
$GPGGA,135626.00,4531.1172,N,00859.0079,E,1,04,2.1,42.6,M,48.1,M,5F
$GPGSV,2,1,05,15,58,190,30,17,38,073,30,19,40,105,25,24,60,299,367F
$GPGSV,2,2,05,25,00,231,*4B
$GLGSV,1,1,02,70,23,326,78,42,049,26,66
$GPGNS,135626.00,4531.1172,N,00859.0079,E,AN,04,2.1,42.6,M,48.1,M,7A
$GPRMC,135626.00,A,4531.1172,N,00859.0079,E,0.0,200.3,270120,A,-8.79e-0302
$GPGST,135626.00,1.9,1.0,1.8,1.9,1.0,1.074
$GPGGA,135627.00,4531.1171,N,00859.0075,E,1,04,2.1,42.6,M,48.1,M,51
$GPGSV,2,1,05,15,58,190,29,17,38,073,30,19,40,105,26,24,60,299,3674
$GPGSV,2,2,05,25,00,231,*4B
$GLGSV,1,1,02,70,23,326,78,42,049,25,65
$GPGNS,135627.00,4531.1171,N,00859.0075,E,AN,04,2.1,42.6,M,48.1,M,74
$GPRMC,135627.00,A,4531.1171,N,00859.0075,E,0.0,300.6,270120,A,2.94e-032C
$GPGST,135627.00,1.9,1.0,1.8,1.9,1.0,1.075
$GPGGA,135628.00,4531.1177,N,00859.0070,E,1,04,2.1,42.6,M,48.1,M,5D
$GPGSV,2,1,05,15,58,190,29,17,38,073,31,19,40,105,26,24,60,299,3675
$GPGSV,2,2,05,25,00,231,*4B
$GLGSV,1,1,02,70,23,326,78,42,049,25,65
$GPGNS,135628.00,4531.1177,N,00859.0070,E,AN,04,2.1,42.6,M,48.1,M,78
$GPRMC,135628.00,A,4531.1177,N,00859.0070,E,0.0,302.7,270120,A,-1.43e-0206
$GPGST,135628.00,1.9,1.0,1.8,1.9,1.0,1.07A
$GPGGA--------String stops!!--------
I hope you could give me some solutions, because I need to have the NMEA strings coming out for ever.
Thanks in advance.
Michele.