Took long time to reset device after dfu through bt smp

[Llama12580]

I run a matter light_switch demo on my nrf54l15dk board, and I added these two configurations in prj.conf to enable dfu over bt smp. Built and burned the firmware into my board.

 

CONFIG_CHIP_DFU_OVER_BT_SMP=y
CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

Then I used nRF Connect App to connect to my board, uploaded dfu_application.zip built when building firmware, and started dfu.

Everything was ok, but it took a long time(about 3 minutes) to reset device after the dfu progress reached 100%. I think it was switching firmware slot or doing something else.

Was that normal? Or are there any way to make it reset quickly?

[Kazi Afroza Sultana]

Hello,

I have built the sample with your added configuration in prj.conf file. It worked ok for me (few second to reset) while resetting device after uploading the zipped file. 

Can you disconnect the device from device manager and try again to connect and see if that helps?

Thanks.

BR

Kazi

[Llama12580]

I tried several times, but it still took about 3 minutes to reset device after DFU.

Are you sure it was just few second for you? I mean, in the nRF Connect APP, it showed reset "successfully" a few seconds later, but for the device, it actually didn't reset successfully because the LEDs on my board didn't light up.

I checked the logs and I found it stucked here for about 3 minutes even nRF Connect APP had showed that reset "successfully".

BTW, which version of ncs you are based on? I was based on ncs_2.8.0.

[Kazi Afroza Sultana]

Hello,

Which version of SDK you are using? I am using v2.8.0.

We have some updates in terms of writing in the flash of nRF54L15.  So, if you use previous version of SDK, you may see the increase swap.  

[Llama12580]

I am using v2.8.0, too.

[Vidar Berg]

Please try with the configuration I mentioned in this post The process of ble ota is a bit long