How to restore the device?

[avchizhov]

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?

[avchizhov]

Hieu, greetings.

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

Br., Toni.

[Hieu]

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

[avchizhov]

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.