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  • Case ID: 352615
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case about nRF9151 serial_lte_modem and mfw-pti_nrf91x1_2.3.8.zip

peter.min

Hi,

1.Please troubleshoot the issue and identify the cause for no response when sending AT%HWVERSION using the merged_serial_lte_modem_v3.0.0.hex and mfw-pti_nrf91x1_2.3.8.zip firmware on the nRF9151.

2.After flashing the nRF9151 with the firmware merged_at_client_v3.0.0.hex and mfw-pti_nrf91x1_2.3.8.zip, sending the command AT%HWVERSION yields the following response:
> AT%HWVERSION
%HWVERSION: nRF9151 LACA A0A
OK

3.After flashing the nRF9151 with the firmware files merged_serial_lte_modem_v3.0.0.hex and mfw-pti_nrf91x1_2.3.8.zip and sending the command AT%HWVERSION, there was no response as shown below:
> AT%HWVERSION
>

Kind Regards,

Peter.Min

  • +1 in reply to peter.min

    Hi Peter, 

    peter.min said:
    Could you please provide the changes in ncs V3.0.0 and ncs v3.1.0 that are compatible with mfw-pti_nrf91x1_2.3.8.zip?

    I have discussed the issue with our Serial LTE Modem developers and the reason for why it does not work is that it hangs due to nRF Cloud JWT generation failure, the certificates are not properly provisioned. This was changed in NCS v3.1.0 to prevent application to hang. 

    That said, the Serial LTE Modem is not designed to be used with the PTI modem FW. Our developers encourages you to use the AT Client sample instead. SLM wraps lot of functionality (TCP clients, polls etc.) that is good to have in product development, i.e. testing the modem functionality, but not in production testing with the PTI image. As SLM is not designed for that use, they cannot guarantee other bugs will not arise if using SLM from SDK v3.1.0

    Hope this provides an answer to your issue.

    Kind regards,
    Øyvind

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