RE: Failed to flash to WISBLOCK4631

yopoitio — Thu, 25 Sep 2025 08:59:48 GMT

Sorry for the late update, but after some tests I realized the problem was the connections. I was using jumper cables, which didn’t provide a stable enough connection, and that was causing all the issues.

Thank you again for all your help.

RE: Failed to flash to WISBLOCK4631

dejans — Thu, 18 Sep 2025 09:32:58 GMT

Hi,

Have you tried to recover the board? You can look at recovering device and recovering protected device.
You could also try to check protection status of connected device.
Additionally, you could try to follow this programming a device guide.

Best regards,
Dejan

RE: Failed to flash to WISBLOCK4631

yopoitio — Wed, 17 Sep 2025 15:50:13 GMT

I am using an nrf52dk hocked up to the PC via USB. Then, via SWD I am connecting the nrf52dk to the rak4631 (VTG<->3.3V, SWDIO<->SWDIO, SWDCLK<->SWDCLK, RESET<->RESET, GND<->GND). I am using the nrf connect extension for vscode, version 3.0.2 and west with nrfjprog to flash.

With Programmer v4.5.0:

16:43:48.006

Initialising the bundled nrfutil device

16:43:49.579

Using the bundled core version for nrfutil device: 8.1.1

16:43:50.119

Using nrfutil-device version: 2.6.4

16:43:50.119

Using nrf-device-lib version: 0.17.35

16:43:50.119

Using nrfjprog DLL version: 10.24.2

16:43:50.119

Using JLink version: JLink_V7.94i

16:43:50.484

Getting serial port options from the persistent store for 000682565660.pc-nrfconnect-programmer

16:43:50.484

Getting serial port options from the persistent store for 000000000.pc-nrfconnect-programmer

16:44:10.272

Selecting device with the serial number 000682565660

16:44:11.993

Error: Failed with exit code 1. Failed to device info one or more devices: * 682565660: [Probe] Device error: Failed to write DebugPort register 1: Unknown Error in J-Link DLL (error code =-1), code: Generic. Message: Operation device-info failed, [Probe] Device error: Failed to write DebugPort register 1: Unknown Error in J-Link DLL (error code =-1).

16:44:11.994

Selected device with the serial number 000682565660

16:44:11.994

Using nrfutil device to communicate with target via JLink

16:44:13.493

Reading readback protection status for Application core

16:44:13.494

Reading readback protection status for Application core 0%

16:44:13.584

Failed "reading readback protection status for application core". Error: code: 9, description: Nrfjlink, message: Batch task protection-get failed, [jlink] INVALID_OPERATION

16:44:13.797

Error: Failed with exit code 1. One or more batch tasks failed: - [jlink] INVALID_OPERATION, code: Nrfjlink. Message: Batch task protection-get failed, [jlink] INVALID_OPERATION.

16:44:13.797

Error: Failed with exit code 1. One or more batch tasks failed: - [jlink] INVALID_OPERATION, code: Nrfjlink. Message: Batch task protection-get failed, [jlink] INVALID_OPERATION.

With west flash --runner nrfjprog:

PS C:\Users\royal\Desktop\IT\5_Testes\hello_world\build\hello_world> west flash --runner nrfjprog
-- west flash: rebuilding
ninja: no work to do.
-- west flash: using runner nrfjprog
-- runners.nrfjprog: reset after flashing requested
Using board 682565660
-- runners.nrfjprog: Flashing file: C:\Users\royal\Desktop\IT\5_Testes\hello_world\build\merged.hex
[ #################### ] 0.938s | Erase file - Done erasing
[error] [ Client] - Encountered error -102: Command program_file executed for 402 milliseconds with result -102
[error] [ nRF52] - The write access failed, but no cause could be determined.
[error] [ nRF52] - It may be due to an unaligned access, accessing a nonexistent memory, or a communication issue.
[error] [ nRF52] - Failed while performing 'Write' operation on target address 0x00000000.
-102: An unknown error.
[error] [ nRF52] - Failed while reading device information.
[error] [ Worker] - An unknown error.
ERROR: JLinkARM DLL reported an error. Try again. If error condition
ERROR: persists, run the same command again with argument --log, contact Nordic
ERROR: Semiconductor and provide the generated log.log file to them.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

FATAL ERROR: command exited with status 33: nrfjprog --program 'C:\Users\royal\Desktop\IT\5_Testes\hello_world\build\merged.hex' --sectoranduicrerase --verify -f NRF52 --snr 682565660

With nrfutil (west flash that uses nrfutil):

-- west flash: rebuilding
ninja: no work to do.
-- west flash: using runner nrfutil
-- runners.nrfutil: reset after flashing requested
Using board 000682565660
-- runners.nrfutil: Flashing file: C:\Users\royal\Desktop\IT\5_Testes\hello_world\build\merged.hex
-- runners.nrfutil: Upload image.
Error: One or more batch tasks failed:
- [jlink] JLINKARM_DLL_ERROR, code: Nrfjlink

FATAL ERROR: command exited with status 9: nrfutil --json device x-execute-batch --batch-path 'C:\Users\royal\Desktop\IT\5_Testes\hello_world\build\generated_nrfutil_batch.json' --serial-number 682565660

RE: Failed to flash to WISBLOCK4631

dejans — Wed, 17 Sep 2025 14:16:02 GMT

Hi,

Can you describe your current setup for flashing and reading?

Which versions of the tools do you use?

Can you try to use Programmer application, west flash and nrfutil for flashing? What is the result?

Best regards,
Dejan