Quectel EM06 Module didn't fix location with GNSS

IoT Modules LTE-A Module
1

Hi,
I was trying to obtain position information from EM06 LTE module.
I had tried following AT commands for getting the position in an open environment having GPS and LTE antennas fixed on the module.

+CFUN: 1
+CPIN: READY
+QUSIM: 1
+QIND: SMS DONE
+QIND: PB DONE
AT
OK
ATI
Quectel
EM06
Revision: EM06ELAR03A09M4G

OK
AT+QGPS=?
+QGPS: (1-4),(1-255),(1-1000),(0-1000),(1-65535)

OK
AT+QGPS? //GNSS is already ON after power on of device
+QGPS: 1

OK
AT+QGPSLOC?
+CME ERROR: 516 //means the location is not fixed at the moment

I checked nmea messages via following command

cat /dev/ttyUSB1

But the position fix was not showing in the nmea message even after 1 hour.
What could be the reason of this issue ?

Thanks and regards,
Sourav MS

2

Thanks for your query in Quectel forums.
AT+QGPSLOC command must carry the parameter setting mode, can’t AT+QGPSLOC directly? Use, please refer to the GNSS instruction manual for testing, thank you.

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3

Thanks for the reply.
Module was connected with an active antenna when this issue was there. It worked when i replaced antenna with a passive antenna.
Now location fix is happening.

Thanks for the help. Have a nice day !

4

Hello,

I am following up on this issue, I have a passive antenna connected to EM06-E module, but can’t get fix either.

ATI
Quectel
EM06
Revision: EM06ELAR03A08M4G

OK
AT+QGPS?
+QGPS: 1

OK
AT+QGPSLOC?
+CME ERROR: 516

I saw that on some modules a minimum firmware release is needed for GNSS use? Is EM06ELAR03A08M4G suitable?

Thanks for any help.

5

Thanks for your query in Quectel forums.
Can I get the GGA sentence information?
image

6

Hello,

AT+QGPSCFG="nmeasrc",1
OK
AT+QGPSGNMEA="GGA"
+QGPSGNMEA: $GPGGA,,,,,,0,,,,,,,,*66

Which is consistent with sentences received by the gpsd application:

$GPGGA,,,,,,0,,,,,,,,*66
$GPRMC,,V,,,,,,,,,,N*53
$GPVTG,,T,,M,,N,,K,N*2C
$GPGSA,A,1,,,,,,,,,,,,,,,*1E

Thanks for your assistance.

Regards.