Hi~
I'm using an nRF52 DK connected to the nRF54L05 with jumper wires for the flashing operation. I've confirmed that the DK works correctly, as it can successfully program other nRF52 and nRF51 chips.
Below is a list of my installed software and their versions:
nRF Connect for Desktop V5.2.0 / Programer V4.6.2
JLink V8.42
NCS 3.1.0
nrfutil 8.1.1 (b6089d0 2025-08-21)
commit-hash: b6089d08a9cfdb292f8ab8d21e0908ded814cd11
commit-date: 2025-08-21
host: x86_64-pc-windows-msvc
build-timestamp: 2025-08-21T14:12:43.593658000Z
classification: nrf-external
C:\Users\admin>nrfutil search
Command Installed Latest Status
91 0.5.0 Not installed
ble-sniffer 0.16.2 Not installed
completion 1.5.0 1.5.0 Installed
core 8.1.1 8.1.1 Installed
device 2.13.0 2.13.0 Installed
npm 0.3.1 Not installed
nrf5sdk-tools 1.1.0 Not installed
sdk-manager 1.6.2 Not installed
suit 0.9.0 Not installed
toolchain-manager 0.15.0 Not installed
trace 4.0.1 Not installed
Found 11 installable command(s)
The following is the log from nRF Connect for Desktop and the Programmer app.
2025-09-02T01:24:28.632Z INFO Initialising the bundled nrfutil device 2025-09-02T01:24:28.661Z DEBUG Application data folder: C:\Users\admin\AppData\Roaming\nrfconnect\pc-nrfconnect-programmer 2025-09-02T01:24:28.738Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:28.771Z DEBUG App pc-nrfconnect-programmer v4.6.2 (official) 2025-09-02T01:24:28.771Z DEBUG App path: C:\Users\admin\.nrfconnect-apps\node_modules\pc-nrfconnect-programmer 2025-09-02T01:24:28.772Z DEBUG nRFConnect 5.2.0, required by the app is (>=5.2.0) 2025-09-02T01:24:28.772Z DEBUG nRFConnect path: C:\Users\admin\AppData\Local\Programs\nrfconnect\resources\app.asar 2025-09-02T01:24:28.772Z DEBUG HomeDir: C:\Users\admin 2025-09-02T01:24:28.772Z DEBUG TmpDir: C:\Users\admin\AppData\Local\Temp 2025-09-02T01:24:28.897Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:28.897Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:28.907Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:29.012Z INFO Using the bundled core version for nrfutil device: 8.0.0 2025-09-02T01:24:29.071Z INFO Using nrfutil-device version: 2.12.3 2025-09-02T01:24:29.071Z INFO Using nrf-device-lib version: 0.17.81 2025-09-02T01:24:29.071Z INFO Using nrf-probe version: 0.40.1 2025-09-02T01:24:29.072Z INFO Using JLink version: JLink_V8.42 2025-09-02T01:24:29.072Z INFO Your version of SEGGER J-Link (8.42) is newer than the one this app was tested with (8.18). The tested version is not required, and your J-Link version will most likely work fine. If you get issues related to J-Link with your devices, use the tested version. 2025-09-02T01:24:29.163Z INFO Getting serial port options from the persistent store for 000682807485.pc-nrfconnect-programmer 2025-09-02T01:24:29.165Z INFO Device connected with the serial number 000682807485 2025-09-02T01:24:29.166Z DEBUG Sending event "programmer: device connected" 2025-09-02T01:24:31.986Z INFO Selecting device with the serial number 000682807485 2025-09-02T01:24:31.998Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:32.761Z INFO Selected device with the serial number 000682807485 2025-09-02T01:24:32.762Z INFO Using nrfutil device to communicate with target via JLink 2025-09-02T01:24:32.762Z INFO JLink OB firmware version J-Link OB-SAM3U128-V2-NordicSemi compiled Apr 1 2025 10:13:00 2025-09-02T01:24:32.762Z INFO Device family NRF52_FAMILY 2025-09-02T01:24:32.762Z INFO Device version NRF54L05_xxxx_REV1 2025-09-02T01:24:32.762Z INFO Board version PCA10040 2025-09-02T01:24:32.768Z DEBUG Sending event "programmer: device selected" 2025-09-02T01:24:32.768Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:32.901Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:33.450Z INFO Reading readback protection status for Application core 2025-09-02T01:24:33.451Z INFO Reading readback protection status for Application core 0% 2025-09-02T01:24:33.453Z INFO Reading readback protection status for Application core 100% 2025-09-02T01:24:33.453Z INFO Application core protection status 'NRFDL_PROTECTION_STATUS_ALL' 2025-09-02T01:24:33.454Z INFO Reading readback protection status for Application core completed 2025-09-02T01:24:33.492Z INFO Skipping reading core Application information as it is protected. 2025-09-02T01:24:33.492Z INFO Skipping reading core Application as it is protected. 2025-09-02T01:24:33.498Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:33.612Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:34.467Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:34.578Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:35.124Z INFO Reading readback protection status for Application core 2025-09-02T01:24:35.124Z INFO Reading readback protection status for Application core 0% 2025-09-02T01:24:35.126Z INFO Reading readback protection status for Application core 100% 2025-09-02T01:24:35.126Z INFO Application core protection status 'NRFDL_PROTECTION_STATUS_ALL' 2025-09-02T01:24:35.126Z INFO Reading readback protection status for Application core completed 2025-09-02T01:24:35.165Z INFO Device is loaded and ready for further operation 2025-09-02T01:24:41.949Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:42.606Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:42.608Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:42.728Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:43.258Z INFO Recovering Application core 2025-09-02T01:24:43.258Z INFO Recovering Application core 0% 2025-09-02T01:24:43.438Z ERROR Failed "recovering application core". Error: code: 1, description: Generic, message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported 2025-09-02T01:24:43.457Z ERROR Error: Failed with exit code 1. One or more batch tasks failed: * 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic) Message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported. 2025-09-02T01:24:45.603Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:46.273Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:47.131Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:47.243Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:47.792Z INFO Reading readback protection status for Application core 2025-09-02T01:24:47.793Z INFO Reading readback protection status for Application core 0% 2025-09-02T01:24:47.795Z INFO Reading readback protection status for Application core 100% 2025-09-02T01:24:47.795Z INFO Application core protection status 'NRFDL_PROTECTION_STATUS_NONE' 2025-09-02T01:24:47.795Z INFO Reading readback protection status for Application core completed 2025-09-02T01:24:50.632Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:51.247Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:51.247Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:51.363Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:24:51.893Z INFO Recovering Application core 2025-09-02T01:24:51.893Z INFO Recovering Application core 0% 2025-09-02T01:24:51.999Z ERROR Failed "recovering application core". Error: code: 1, description: Generic, message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported 2025-09-02T01:24:52.017Z ERROR Error: Failed with exit code 1. One or more batch tasks failed: * 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic) Message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported. 2025-09-02T01:36:39.801Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:40.540Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:40.657Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:41.215Z INFO Reading memory for Application core 2025-09-02T01:36:41.219Z INFO Reading memory for Application core 0% 2025-09-02T01:36:41.311Z ERROR Error: Failed with exit code 1. One or more batch tasks failed: * 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic) Message: Batch task memory-read failed, Device error: Emulator error: Failed to connect to device: Feature is not supported. 2025-09-02T01:36:43.006Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:43.680Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:44.547Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:44.663Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:45.200Z INFO Reading readback protection status for Application core 2025-09-02T01:36:45.200Z INFO Reading readback protection status for Application core 0% 2025-09-02T01:36:45.202Z INFO Reading readback protection status for Application core 100% 2025-09-02T01:36:45.202Z INFO Application core protection status 'NRFDL_PROTECTION_STATUS_NONE' 2025-09-02T01:36:45.203Z INFO Reading readback protection status for Application core completed 2025-09-02T01:36:48.829Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:49.440Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:49.441Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:49.558Z DEBUG Sending event "programmer: running nrfutil device" 2025-09-02T01:36:50.105Z INFO Recovering Application core 2025-09-02T01:36:50.105Z INFO Recovering Application core 0% 2025-09-02T01:36:50.213Z ERROR Failed "recovering application core". Error: code: 1, description: Generic, message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported 2025-09-02T01:36:50.232Z ERROR Error: Failed with exit code 1. One or more batch tasks failed: * 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic) Message: Batch task recover failed, Device error: Emulator error: Failed to connect to device: Feature is not supported.
Below is the nrfutil log.
C:\Users\admin>nrfutil device recover
x Failed to recover 682807485, Device error: Emulator error: Failed to connect to device: Feature is not supported Error: One or more recover tasks failed:
* 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic)
C:\Users\admin>nrfutil device device-info
serial_number: 000682807485
boardVersion: PCA10040
deviceFamily: NRF54L_FAMILY
deviceName: nRF54L05
deviceVersion: NRF54L05_xxAA_REV1
jlinkObFirmwareVersion: J-Link OB-SAM3U128-V2-NordicSemi compiled Apr 1 2025 10:13:00
C:\Users\admin>nrfutil device fw-info
Error: One or more get firmware info for tasks failed:
* 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic)
C:\Users\admin>nrfutil device reset
x Failed to reset 682807485, Device error: Emulator error: Failed to connect to device: Feature is not supported Error: One or more reset tasks failed:
* 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic)
C:\Users\admin>nrfutil device erase
x Failed to erase 682807485, Device error: Emulator error: Failed to connect to device: Feature is not supported Error: One or more erase tasks failed:
* 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic)
C:\Users\admin>nrfutil device recover
x Failed to recover 682807485, Device error: Emulator error: Failed to connect to device: Feature is not supported Error: One or more recover tasks failed:
* 682807485: Device error: Emulator error: Failed to connect to device: Feature is not supported (Generic)
C:\Users\admin>nrfutil device device-info
serial_number: 000682807485
boardVersion: PCA10040
deviceFamily: NRF54L_FAMILY
deviceName: nRF54L05
deviceVersion: NRF54L05_xxAA_REV1
jlinkObFirmwareVersion: J-Link OB-SAM3U128-V2-NordicSemi compiled Apr 1 2025 10:13:00
Please let me know what the issue is. Thanks.
