nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

ByteSpectrum — Tue, 02 Sep 2025 05:08:59 GMT

Hi Hieu,

No They are not different. Actually, those are from same build.

I am sure it will be very difficult for you to give reason behind this behavior.

As I am not able to reproduce, let's close this thread as of now. I will contact if issue reproduce again in future.

Thanks,

Tarun

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

Hieu — Mon, 01 Sep 2025 19:08:47 GMT

Hi Tarun,

Could you please compare the .bin files from the OTA payload and the merged.hex file you flash directly with the programmer? Are there any chances they are different?

Regards,

Hieu

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

ByteSpectrum — Fri, 29 Aug 2025 10:46:04 GMT

Hi Hieu,

I have found a puzzling issue.

When I updated only the application using an Over-the-Air (OTA) update, the problem persists each and every time. However, when I erased whole flash and flashed both the bootloader and the application together using a programmer, the issue disappeared. Now I am not able to reproduce it.

Any ideas why this might be happening?

Thanks,

Tarun

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

Hieu — Fri, 29 Aug 2025 10:25:24 GMT

Hi Tarun,

I checked the files. So MCUboot doesn't get any BT power config applied, which is expected, because it doesn't have a BT stack. However, that also means that there shouldn't be any strange reason it could affect the TX Power of the main application, whose configurations are properly in place.

Do you use dynamic TX Power control? If not, please try to disable CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL.

If you use dynamic TX Power control, then please try to set it in code.

Hieu

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

ByteSpectrum — Thu, 28 Aug 2025 04:33:38 GMT

Hi Hieu,

Please find attached.

Thanks,

Tarun

devzone.nordicsemi.com/.../pristine_5F00_build_5F00_log.txt devzone.nordicsemi.com/.../app_2E00_config devzone.nordicsemi.com/.../3034_2E00_mcuboot_2E00_config

RE: nRF54L15 + MCUboot + NCS v3.0.2: Range issue with MCUBoot

Hieu — Wed, 27 Aug 2025 21:22:27 GMT

Hi ByteSpectrum,

Could you please share the following from the build with MCUboot?

The application compiled Kconfig file, located at <build directory>/<application name>/zephyr/.config
The MCUboot compiled Kconfig file, located at <build directory>/mcuboot/zephyr/.config
Full pristine build log

Hieu