RE: Host DFU to nRF54L05

Amanda Hsieh — Tue, 09 Dec 2025 15:57:20 GMT

Hi,

[quote user=""]Is there another solution to upgrade the BLE?[/quote]

You can implement an SMP client (over BLE, UART, etc.) on the Host MCU, which can talk to the existing SMP server on the nRF54L. Here is the sample Bluetooth: Central SMP Client.

[quote user=""]Does this BLE nRF54L05 have a built-in bootloader like STM32 devices?[/quote]

You can decide whether the application is built with/without the mcuboot bootloader. See nRF54L DFU config.

[quote user=""]Is the best solution porting the SMP protocol to the host MCU?[/quote]

Yes, FOTA updates are supported using MCUmgr’s Simple Management Protocol (SMP) over Bluetooth^®. See FOTA over Bluetooth Low Energy. Here is the Bluetooth: Central SMP Client sample.

[quote user=""]If SMP is the way, do you have a small implementation of the SMP upgrade protocol part to share with us? Note: the host MCU is not running Zephyr.[/quote]

Unfortunately, there is no such resource as your requirement. You would need to implement it yourself based on the mcumgr project and/or refer to the Zephyr smp_client example.

Regards,
Amanda H.