How to restore the device?

I have the nRF Hw v1, and it seems like I did something wrong with a Fw:

nRF is recognizable by a computer as the COM3/4/5 device:

And it is accessible with the nRF Programmer:

The nRF Serial Terminal connects to the nRF, but, the nRF does not respond to any AT command:

There is no “OK” reply, nor “Error”.

Another nRF works fine for me.

It looks like the Fw Application is loaded on the nRF and it is booted properly, while the modem does not respond.

Is there any Fw for the modem?

I saw some Segger software tool, and it offers to restore some image from time to time. Could it be connected to this problem?

Parents
  • Greetings to everybody.

    I have, occassionally, found, that the device (Hw v1) reports something to the Serial Terminal app (v1.4.3):

    ---

    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    [00:02:34.510,131] <err> at_cmd: Failed to open AT socket (err:-117)
    [00:02:34.517,211] <wrn> at_notif: Already initialized. Nothing to do
    [00:02:34.524,505] <inf> asset_tracker: Asset tracker started
    [00:02:34.530,670] <inf> watchdog: Watchdog timeout installed. Timeout: 60000
    [00:02:34.538,269] <inf> watchdog: Watchdog started
    [00:02:34.544,281] <err> nrf_cloud_client_id: Failed to obtain IMEI, error: -1
    [00:02:34.552,154] <err> nrf_cloud_transport: Could not obtain configured client ID, error: -1
    [00:02:34.561,523] <err> asset_tracker: Cloud backend could not be initialized, error: -1
    [00:02:34.570,465] <err> asset_tracker: LTE link disconnect
    [00:02:34.576,751] <err> asset_tracker: lte_lc_power_off failed: -14
    *** Booting Zephyr OS build v2.7.0-ncs1 ***down modem
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    [00:02:34.510,070] <err> at_cmd: Failed to open AT socket (err:-117)
    [00:02:34.517,150] <wrn> at_notif: Already initialized. Nothing to do
    [00:02:34.524,475] <inf> asset_tracker: Asset tracker started
    [00:02:34.530,639] <inf> watchdog: Watchdog timeout installed. Timeout: 60000
    [00:02:34.538,238] <inf> watchdog: Watchdog started
    [00:02:34.544,250] <err> nrf_cloud_client_id: Failed to obtain IMEI, error: -1
    [00:02:34.552,154] <err> nrf_cloud_transport: Could not obtain configured client ID, error: -1
    [00:02:34.561,523] <err> asset_tracker: Cloud backend could not be initialized, error: -1
    [00:02:34.570,465] <err> asset_tracker: LTE link disconnect
    [00:02:34.576,782] <err> asset_tracker: lte_lc_power_off failed: -14
    *** Booting Zephyr OS build v2.7.0-ncs1 ***down modem
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    [00:02:34.510,070] <err> at_cmd: Failed to open AT socket (err:-117)
    [00:02:34.517,150] <wrn> at_notif: Already initialized. Nothing to do
    [00:02:34.524,444] <inf> asset_tracker: Asset tracker started
    [00:02:34.530,639] <inf> watchdog: Watchdog timeout installed. Timeout: 60000
    [00:02:34.538,208] <inf> watchdog: Watchdog started
    [00:02:34.544,219] <err> nrf_cloud_client_id: Failed to obtain IMEI, error: -1
    [00:02:34.552,124] <err> nrf_cloud_transport: Could not obtain configured client ID, error: -1
    [00:02:34.561,492] <err> asset_tracker: Cloud backend could not be initialized, error: -1
    [00:02:34.570,434] <err> asset_tracker: LTE link disconnect
    [00:02:34.576,721] <err> asset_tracker: lte_lc_power_off failed: -14
    *** Booting Zephyr OS build v2.7.0-ncs1 ***down modem
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    [00:02:34.510,009] <err> at_cmd: Failed to open AT socket (err:-117)
    [00:02:34.517,089] <wrn> at_notif: Already initialized. Nothing to do
    [00:02:34.524,414] <inf> asset_tracker: Asset tracker started
    [00:02:34.530,578] <inf> watchdog: Watchdog timeout installed. Timeout: 60000
    [00:02:34.538,177] <inf> watchdog: Watchdog started
    [00:02:34.544,189] <err> nrf_cloud_client_id: Failed to obtain IMEI, error: -1
    [00:02:34.552,093] <err> nrf_cloud_transport: Could not obtain configured client ID, error: -1
    [00:02:34.561,462] <err> asset_tracker: Cloud backend could not be initialized, error: -1
    [00:02:34.570,404] <err> asset_tracker: LTE link disconnect
    [00:02:34.576,721] <err> asset_tracker: lte_lc_power_off failed: -14
    *** Booting Zephyr OS build v2.7.0-ncs1 ***down modem
    I: Starting bootloader
    I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
    I: Boot source: none
    I: Swap type: none
    I: Bootloader chainload address offset: 0x10000
    *** Booting Zephyr OS build v2.7.0-ncs1 ***
    Flash regions Domain Permissions
    00 03 0x00000 0x20000 Secure rwxl
    04 31 0x20000 0x100000 Non-Secure rwxl

    Non-secure callable region 0 placed in flash region 3 with size 32.

    SRAM region Domain Permissions
    00 07 0x00000 0x10000 Secure rwxl
    08 31 0x10000 0x40000 Non-Secure rwxl

    Peripheral Domain Status
    00 NRF_P0 Non-Secure OK
    01 NRF_CLOCK Non-Secure OK
    02 NRF_RTC0 Non-Secure OK
    03 NRF_RTC1 Non-Secure OK
    04 NRF_NVMC Non-Secure OK
    05 NRF_UARTE1 Non-Secure OK
    06 NRF_UARTE2 Secure SKIP
    07 NRF_TWIM2 Non-Secure OK
    08 NRF_SPIM3 Non-Secure OK
    09 NRF_TIMER0 Non-Secure OK
    10 NRF_TIMER1 Non-Secure OK
    11 NRF_TIMER2 Non-Secure OK
    12 NRF_SAADC Non-Secure OK
    13 NRF_PWM0 Non-Secure OK
    14 NRF_PWM1 Non-Secure OK
    15 NRF_PWM2 Non-Secure OK
    16 NRF_PWM3 Non-Secure OK
    17 NRF_WDT Non-Secure OK
    18 NRF_IPC Non-Secure OK
    19 NRF_VMC Non-Secure OK
    20 NRF_FPU Non-Secure OK
    21 NRF_EGU0 Non-Secure OK
    22 NRF_EGU1 Non-Secure OK
    23 NRF_EGU2 Non-Secure OK
    24 NRF_EGU3 Non-Secure OK
    25 NRF_EGU4 Non-Secure OK
    26 NRF_EGU5 Non-Secure OK
    27 NRF_DPPIC Non-Secure OK
    28 NRF_REGULATORS Non-Secure OK
    29 NRF_PDM Non-Secure OK
    30 NRF_I2S Non-Secure OK
    31 NRF_GPIOTE1 Non-Secure OK

    SPM: NS image at 0x20200
    SPM: NS MSP at 0x200258d8
    SPM: NS reset vector at 0x29df1
    SPM: prepare to jump to Non-Secure image.

    ---

    It seems, like it tries booting or loading something, that is called as Zephyr.

    Br., Toni.

  • Hello Toni,

    avchizhov said:

    We have tried with the latest Fw:

    nrf9160dk_mfw-1.3.7_sdk-2.8.0 [Latest Version]

    and with the latest Asset Tracker v1:

    2021-12-15_cfedfdfa (v1.3.1)

    The both do not work for us.

    The MFW you tried has a sdk-2.8.0 suffix, indicating that it was built for nRF Connect SDK (NCS) v2.8.0. Meanwhile, your Asset Tracker app has a 2021 prefix, indicating that it was built in 2021, which is before NCS v2.8.0 is released.
    What I mean is, those two files are likely not released and tested together.

    I recommend using firmware from the same package release, such as 2024-03-13_af2b60d2.
    After you recover your device to working condition, I recommend following our Quick Start guides to continue. See:
    https://docs.nordicsemi.com/bundle/ug_nrf9160_dk/page/UG/nrf91_DK/intro.html

    Best regards,

    Hieu

  • Hieu, greetings.

    Could you suggest us: which Fw do you recommend us to use for the restoring?

    Br., Toni.

Reply Children
  • Hi Toni,

    In nrf9160dk_mfw-1.3.7_sdk-2.8.0.zip, which you previously used, you can find both a modem firmware in mfw_nrf9160_1.3.7.zip, and an Asset Tracker v2 pre-built application in img_app_bl. Please use them.

    For more information, please refer to the CONTENTS.txt file.

    Best regards,

    Hieu

  • Hieu, greetings.

    Thank you for your answer.

    But, to tell the truth, I am completely lost.

    Please, tell me: what exactly should I do to restore your device?

    Please tell me: which exact file should I pick up using the Programmer application, and to put it on your device?

    The last message you wrote using "nrf9160dk_mfw-1.3.7_sdk-2.8.0.zip", but just previous message you wrote, that the used Fw has the "sdk-2.8.0 suffix", when the Asset Tracker has the "2021 prefix", and they do not fit each other. Do you offer to flash the device, that has the Fw sdk-2.8.0 with the Fw sdk-2.8.0? It sounds illogical, if it is that.

    Moreover, the Quick Start application flashes a device with the latest Fw v1.3.7:

    After we get this:

    The immediate log contains the next records:

    ---

    2025-03-14T11:19:15.247Z INFO Initialising the bundled nrfutil device
    2025-03-14T11:19:15.299Z DEBUG Started watching devices
    2025-03-14T11:19:16.953Z INFO Using the bundled core version for nrfutil device: 7.13.0
    2025-03-14T11:19:17.661Z INFO Using nrfutil-device version: 2.7.5
    2025-03-14T11:19:17.661Z INFO Using nrf-device-lib version: 0.17.41
    2025-03-14T11:19:17.661Z INFO Using nrfjprog DLL version: 10.24.2
    2025-03-14T11:19:17.661Z INFO Using JLink version: JLink_V7.94i
    2025-03-14T11:19:28.274Z DEBUG Selected device: nRF9160 DK
    2025-03-14T11:19:28.333Z DEBUG Changed step: Info
    2025-03-14T11:19:31.133Z DEBUG Changed step: Rename
    2025-03-14T11:19:32.853Z DEBUG Changed step: Program
    2025-03-14T11:19:37.797Z ERROR [ProbeLib] [2025-03-14 11:19:37.797303Z] {jlink_usb_000960035269} J-Link: Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.388Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.487Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.589Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.686Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.786Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.888Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:38.990Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:39.088Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:39.196Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:39.295Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:39.394Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:19:39.493Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:20:17.464Z DEBUG Changed step: Verify
    2025-03-14T11:20:20.470Z INFO Opened port with options: {"path":"COM8","baudRate":115200}
    2025-03-14T11:20:22.472Z ERROR Error: Received ERROR as return value from AT command
    2025-03-14T11:20:22.478Z INFO Closed port: COM8
    2025-03-14T11:20:53.307Z DEBUG Changed step: Program
    2025-03-14T11:21:00.534Z ERROR [ProbeLib] [2025-03-14 11:21:00.534562Z] {jlink_usb_000960035269} J-Link: Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.086Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.182Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.284Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.385Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.484Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.585Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.683Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.781Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.891Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:01.988Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:02.091Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:21:02.189Z ERROR [jlink] [NRFJPROG][JLink][000960035269] Not supported by current CPU + target interface combination.
    2025-03-14T11:22:02.363Z DEBUG Changed step: Verify
    2025-03-14T11:22:05.378Z INFO Opened port with options: {"path":"COM8","baudRate":115200}
    2025-03-14T11:22:07.379Z ERROR Error: Received ERROR as return value from AT command
    2025-03-14T11:22:07.384Z INFO Closed port: COM8
    2025-03-14T11:22:24.344Z DEBUG Changed step: SIM
    2025-03-14T11:22:25.532Z DEBUG Changed step: Evaluate
    2025-03-14T11:22:26.453Z DEBUG Changed step: Learn
    2025-03-14T11:22:27.087Z DEBUG Changed step: Develop
    2025-03-14T11:22:28.503Z DEBUG Changed step: Apps
    2025-03-14T11:22:29.866Z DEBUG Changed step: Finish

    ---

    Please provide us with a correct instruction, if you mention some other steps.

    Br., Toni.

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