GPS is stuck on EM7455

IoT Modules
1

Hi,

We’re using EM7455 module to track vehicle movement and to send data back to the server. The issue is that on some of the modules the GPS gets “stuck” and keeps reporting the same coordinates. The modules have the 9999999_9904609_SWI9X30C_02.38.00.00_00_GENERIC_002.082_000 and the 9999999_9904780_SWI9X30C_02.33.03.00_00_VERIZON_002.079_001 firmwares installed with the Verizon one being the active firmware.

The modules are configured to expose serial devices for the modem and NMEA. These are the commands sent to the modem to start the GPS tracking:

AT!ENTERCND=“A710”
AT!CUSTOM=“GPSENABLE”,1
AT!CUSTOM=“GPSSEL”,0
AT+WANT=1
AT!GPSEND
AT!GPSTRACK=1,255,20,1000,1

We’re using the Sierra Wireless Shark Fin antennas if that makes any difference.

Any help is appreciated!

2

Can it view satellite in at!gpssatinfo?
Does it output nmea frame?

3

Thank you for replying and sorry for my slow reply. The issue might be in the software that is using the module. We’re still investigating. I’ll post again if it issue is with the EM7455 module. Thank you.