P-L496G-Cell02 Troubleshooting - ST STM32 User Manual

P-L496G-CELL02 troubleshooting

6 P-L496G-CELL02 troubleshooting
On some P-L496G-CELL02, the BG96 modem might remain in test mode. Therefore, it is
necessary to put the modem in signaling mode to be able to connect to a cellular network for
the first time.
It concerns only the modems shipped with the following firmware revision:
BG96MAR02A05M1G
If the user is unable to connect to a cellular network with the BG96MAR02A05M1G
firmware, the AT command 'AT+CFUN=1' must be sent to the modem.
The user might run the demonstration software preloaded in the Discovery board to do that:
1. Open a terminal on the PC (Tera Term).
2. Connect the BG96 to the Discovery board.
3. Connect the Discovery board to the PC using the OTG FS USB connector CN8.
4. Reset the Discovery by pressing the reset button B1. Press the joystick UP button until
the following message appears to indicate that the user might send AT commands to
the BG96 modem:
–
–
–
–
–
–
–
–
–
5. Verify the firmware revision by typing 'at+cgmr', if the firmware is
BG96MAR02A05M1G, follow the next step.
6. Put the modem in signaling mode by entering the command 'AT+CFUN=1', the modem
must respond OK.
7. Confirm that the modem is in signaling mode by entering the command 'AT+CFUN?',
the modem must respond +CFUN: 1.
8. This operation must be performed only once.
16/22
Welcome to STM32-Cellular to Cloud (STM32-C2C)
AT commands terminal: connection to PC with USB-OTG FS is needed.
Modem is using eSIM.
RDY
AT terminal ready... Press the joystick button to restart the AT terminal using the
micro SIM (if present).
AT+CMEE=2
OK
ATE1
OK
UM2365 Rev 3
UM2365