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EM Board

The following information targets the uPiloT board

AT Config

For more details take a look at the AT command manual available on the_source

NetworkManager / ModemManager occupies and transacts on the Modem/AT serial interfaces so it is recommended to stop their processes before sending AT commands to the modem

Unlock

AT!entercnd="A710"

Check modem type and firmware rev

ati9                                                                            
Manufacturer: Sierra Wireless, Incorporated                                     
Model: EM7455                                                                   
Revision: SWI9X30C_02.24.05.06 r7040 CARMD-EV-FRMWR2 2017/05/19 0

USB composition settings

AT!usbcomp=?
!USBCOMP:                                                                       
AT!USBCOMP=<Config Index>,<Config Type>,<Interface bitmask>                     
  <Config Index>      - configuration index to which

AT!usbcomp?                                                                     
Config Index: 1                                                                 
Config Type:  1 (Generic)                                                       
Interface bitmask: 0000050D (diag,nmea,modem,rmnet0,rmnet1)

Enable just MBIM

AT!usbcomp=1,1,0000100D

Others - untested

EM75xx series:
AT!ENTERCND="A710"
AT#USBCOMP=1,3,100D
AT!RESET

J Thompson 2022