Issue recovering nRF5340 Audio DK

RE: Issue recovering nRF5340 Audio DK

kumareshdhotrad — Thu, 16 Oct 2025 19:09:35 GMT

I’ve identified the root cause. It turned out to be due to multiple J-Links connected simultaneously along with several active VS Code instances. The GDB servers launched by VS Code were interfering with each other and putting the J-Links into an unstable state.

After closing all VS Code instances, the J-Links reset properly and I was able to recover the boards without any issues.

RE: Issue recovering nRF5340 Audio DK

kumareshdhotrad — Thu, 16 Oct 2025 17:29:36 GMT

I have entered this state again. Disconnecting the board for a while and reconnecting did not help. Neither did opening the Jlink commander.

I get these logs:

PS D:\Work\nRF\5340\nrf5340_audio\unicast_server_binaries> nrfutil device list
1050193515
Product J-Link
Board version PCA10121
Traits usb, jlink, seggerUsb, devkit

Supported devices found: 1

PS D:\Work\nRF\5340\nrf5340_audio\unicast_server_binaries> nrfutil device recover --core Network --serial-number 1050193515
❌ Failed to recover 1050193515, Timed out waiting for response from worker. Error: One or more recover tasks failed:
* 1050193515: Timed out waiting for response from worker. (Generic)

PS D:\Work\nRF\5340\Pendant\nrf5340_audio\unicast_server_binaries>

RE: Issue recovering nRF5340 Audio DK

SableHarrington — Thu, 09 Oct 2025 08:31:12 GMT

It seems your nRF5340 recovery issue may relate to corrupted boot memory. Using a reliable EEPROM like M27C512-90C1 can help ensure stable firmware storage during recovery processes. Its consistent read/write performance supports dependable data retrieval, minimizing bootloader errors when flashing the board or restoring the network core through nrfjprog or nrfutil commands.

RE: Issue recovering nRF5340 Audio DK

dejans — Tue, 30 Sep 2025 14:07:30 GMT

Hi,

Thank you for the update.

Best regards,
Dejan

RE: Issue recovering nRF5340 Audio DK

kumareshdhotrad — Tue, 30 Sep 2025 13:55:49 GMT

Hi Dejan,

Apologies for the delayed response. I tired recovering the device a few hours later which worked.

RE: Issue recovering nRF5340 Audio DK

dejans — Wed, 24 Sep 2025 12:57:27 GMT

Hi,

Have you tried to use nrfutil for recovery?

nrfutil device recover --core Network
nrfutil device recover

Best regards,
Dejan