EM7455 GPS not available with SWI9X30C_02.24.03.00


#1

Hi,

this is:

Manufacturer: Sierra Wireless, Incorporated
Model: EM7455
Revision: SWI9X30C_02.24.03.00 r6978 CARMD-EV-FRMWR2 2017/03/02 13:36:45

AT!GOBIIMPREF?
!GOBIIMPREF: 
 preferred fw version:    02.24.03.00
 preferred carrier name:  GENERIC
 preferred config name:   GENERIC_002.021_000
 current fw version:      02.24.03.00
 current carrier name:    GENERIC
 current config name:     GENERIC_002.021_000

tested with DM,NMEA,AT,MBIM und DM,NMEA,AT,QMI mode.

AT!CUSTOM?
!CUSTOM: 
             GPSENABLE          0x01
             GPSSEL             0x01
             IPV6ENABLE         0x01
             SIMLPM             0x02
             USBSERIALENABLE    0x01
             FASTENUMEN         0x01
             SINGLEAPNSWITCH    0x01

GPSSEL is set to AUX antenna, GPSENABLE is also enabled.

AT!GPSAUTOSTART?
  function:  2
  fixtype: 1
  maxtime: 180 seconds
  maxdist: 50 meters
  fixrate: 1 seconds

function is not documented in AT Command Reference 4118014.

Even with AT!GPSFIX=1,60,100 and clear view to the sky I do not get a fix:

AT!GPSSTATUS?
Current time: 1980 01 06 6 00:17:52

1980 01 06 6 00:00:00 Last Fix Status    = FAIL,  FAILCODE = 0
1980 01 06 6 00:00:00 Fix Session Status = FAIL,  FAILCODE = 0

No TTFF available


AT!GPSLOC?
Not Available

Also GPSNMEA is documented, but seems not to be available in my current firmware:

AT!GPSNMEA?
!GPSNMEA: NOT IMPLEMENTED

Although setting/retrieving NMEA config works:

AT!GPSNMEACONFIG=1,1
OK

AT!GPSNMEASENTENCE?
!GPSNMEASENTENCE: 0x3F

Any clue on how to enable NMEA output?

Cheers,
Dominik


#2
echo \$GPS_START >/dev/ttyUSB1

where /dev/ttyUSB1 is your NMEA serial port


#3

Oh well. I must have overlooked that. Thank you! It’s now working :slight_smile:


#4

How can I stop the Windows drivers from installing instead of the Sierra Wireless drivers?