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  • Case ID: 295392
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Serial LTE Modem sample not reponding to any AT commands from LTE link monitor

ericlestor

Hi,

Because I am not getting any answers to my original ticket(ID:294922), I'll try it this way by opening another ticket on the same issue.

I have a nrf9160DK and flashed it with Serial LTE Modem sample, however all the AT commands are just timing out.

2022-09-06T10:18:35.621Z INFO Modem port is opened
2022-09-06T10:18:41.875Z DEBUG modem >> AT+CFUN?
2022-09-06T10:18:42.876Z ERROR Error: 'AT+CFUN?
' timed out

I use default configuration and here is the log that I got from RTT:

00> *** Booting Zephyr OS build v3.0.99-ncs1-1  ***
00> I: Starting bootloader
00> I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
00> I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
00> I: Boot source: none
00> I: Swap type: none
00> I: Bootloader chainload address offset: 0x10000
00> I: Jumping to the first image slot

Do you have any idea what the problem might be?

  • 0 in reply to Sigurd

    Hi,

    sorry for the delay in answering, but I was on holiday last week. So here are the results:

    1) I was using LTE link monitor with correct COM port and still can't get it to work

    however..

    2) when I programmed your merged.zip -file to 9160DK it seems to be working just fine

    I can work with this, but it still leaves me wondering what is the problem with my configuration or flashing with VS code of your serial_lte_modem example.

  • 0 in reply to ericlestor
    ericlestor said:

    2) when I programmed your merged.zip -file to 9160DK it seems to be working just fine

    That's good. 

    ericlestor said:
    I can work with this, but it still leaves me wondering what is the problem with my configuration or flashing with VS code of your serial_lte_modem example.

    Maybe the toolchain was not configured correctly:

    For flashing, maybe try to do a erase and flash

    or just as an test, try to flash your compiled merged.hex with nrfjprog or nRF-Connect programmer app instead.

  • +1 in reply to Sigurd

    Hi,

    unchecked the "Enable debug options" box from build configurations. Now it is working fine whether I flash it directly from VScode or nrf-connect programmer.

    Thanks very much for your help on this issue.

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