Enabled DFU and OTA in nRF54L15

RE: Enabled DFU and OTA in nRF54L15

AHaug — Mon, 17 Nov 2025 18:20:30 GMT

[quote user="Haresh05"] I was using Device Manager app as it was suggested here.[/quote]

Aha, that makes sense. I will discuss this with the author of the course. I'm sure they have their opinions of why to use the Device Manager instead of nRF Connect for Mobile

[quote user="Haresh05"]

Moreover, the sample sets CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y in prj.conf but it also mentions, "For your custom production project, we recommend that you look at what option CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU sets for you, and include the ones from there you need instead."

Can you guide me on what configs are necessary for my usecase?

[/quote]

I'm not able to say what configs are necessary for your usecase since that may vary on factors that I'm not aware of but here's two angles to attempt to help you get enough confidence in what you need to have or not:

Firstly: you can have a look at what the Kconfig selects and implies in the Kconfig reference search

Some of these items are not applicable for all projects, but the _NCS_SAMPLE_MCUMGR config pulls in everything that we need in a basic NCS BLE OTA application.

Secondly: Another angle can be to have a look at this (unofficial) sample that I've created that showcases how to do this without this one size fits all sample configuration: https://github.com/aHaugl/samples_for_NCS/blob/main/bootloader/sysbuild/6_BLE/1_ble_fota/prj.conf.

This sample is of course heavily based upon the academy, but mostly it uses the configurations from the smp server sample found in zephyr/samples/subsys/mgmnt/smp_svr: https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/subsys/mgmt/mcumgr/smp_svr. Here you can see the basic prj.conf to add mcumgr configurations: https://github.com/nrfconnect/sdk-zephyr/blob/main/samples/subsys/mgmt/mcumgr/smp_svr/prj.conf and the BLE OTA prj.conf overlay for BLE OTA: https://github.com/nrfconnect/sdk-zephyr/blob/main/samples/subsys/mgmt/mcumgr/smp_svr/overlay-bt.conf

Docs for SMP server sample can be seen here: https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/samples/subsys/mgmt/mcumgr/smp_svr/README.html#smp-svr

Kind regards,
Andreas

RE: Enabled DFU and OTA in nRF54L15

Haresh05 — Fri, 14 Nov 2025 12:54:45 GMT

Hi,

I tried with nRF Connect app and the OTA working as expected with the sample and with my custom application as well. I was using Device Manager app as it was suggested here.

Can you guide me on what configs are necessary for my usecase?

Regards,

Haresh

RE: Enabled DFU and OTA in nRF54L15

AHaug — Fri, 14 Nov 2025 09:51:51 GMT

Hi,

Thanks for the answers

[quote user="Haresh05"]

I enabled below logs in prj.conf but it does not dump anything related to disconnection.

[/quote]

Does it dump anything new at all? I should've phrased myself differently in my initial reply, as I'm also curious about any output from the bootloader during the DFU procedure

[quote user="Haresh05"]2. Try to update using nRF DeviceManager app. [/quote]

Do you see the same when using the nRF Connect app? https://www.nordicsemi.com/Products/Development-tools/nRF-Connect-for-mobile? This is the one we recommend for OTA testing, the device manager is just a reference application showcasing how you can implement a DFU feature in your own apps. nRF Connect for Mobile has better support for more features

Lastly, could you obtain and provide a sniffer trace for the BLE activity during DFU if the nRF Connect app does not give any different results?

Kind regards,
Andreas

RE: Enabled DFU and OTA in nRF54L15

Haresh05 — Thu, 13 Nov 2025 12:23:22 GMT

Hi Andreas,

I enabled below logs in prj.conf but it does not dump anything related to disconnection.

CONFIG_MCUBOOT_UTIL_LOG_LEVEL_DBG=y
CONFIG_IMG_MANAGER_LOG_LEVEL_DBG=y
CONFIG_MCUMGR_LOG_LEVEL_DBG=y
CONFIG_MCUMGR_GRP_IMG_LOG_LEVEL_DBG=y
CONFIG_MCUMGR_GRP_OS_LOG_LEVEL_DBG=y
CONFIG_MCUMGR_GRP_ZBASIC_LOG_LEVEL_DBG=y
CONFIG_MCUMGR_TRANSPORT_LOG_LEVEL_DBG=y
CONFIG_STREAM_FLASH_LOG_LEVEL_DBG=y

Let me know if there is any other config which needs to be enabled.

[quote userid="107683" url="~/f/nordic-q-a/125576/enabled-dfu-and-ota-in-nrf54l15/554117"]

You say that it sometimes works and sometimes does not work. What's the difference between these two attempts?

[/quote]

I am doing nothing different in two attempts. The steps I follow is

1. Flash the image using vscode

2. Try to update using nRF DeviceManager app.

Regards,

Haresh

RE: Enabled DFU and OTA in nRF54L15

AHaug — Wed, 12 Nov 2025 12:36:55 GMT

Hi,

Could you enable logs in MCUBoot and see if you get a reason for the timeout there? Disconnected, reason 0x08 means that it's a timeout issue.

You say that it sometimes works and sometimes does not work. What's the difference between these two attempts?

Kind regards,
Andreas