nRF Connect Device Manager: issue with version 1.4.3 of the mobile app - low image upload rate

[Dagan Raviv]

Hi,

I'm working with nRF52833 + bl653 board, ncs 1.9.1.

I recently updated my mobile Device Manager app to version 1.4.3 and noticed that when uploading an image for upgrade (using "confirm only") uploading rate was reduced to 1-2 kB/s, while it used to be 5-6 kB/s with previous app versions.

Do you know what may be the problem?

Kind regards,

Dagan

[Einar Thorsrud]

Hi,

Based on the version number I assume you are using the iOS version. You can see the updates in that version here, and the only change that I think could be relevant is this, which could disable pipe-lining.

Which iPhone model and iOS version are you using? And which Device Manger version were you using before? Do you see the same speeds if you test with a different iPhone model?

[Dagan Raviv]

Hi Einar,

Thanx for the response.

I'm using iPhone 14 with iOS 17.0.3, updated the Device Manager to 1.4.3 from 1.4.2, but since the release was only a couple of days after the previous version I'm not sure which of the two last versions introduced the issue on my device. When I used version 1.4 the upload rate was definitely higher though.

As for now I haven't tested it with a different iPhone model yet, I'll update when I did.

Thanks again

[Dagan Raviv]

Hello again,

Any new ideas of what might be causing the issue?

I just got to check the Device Manager update on an older mobile device model (iPhone X), when upgraded the app to latest version (v1.4.3) image upload speed was reduced by half again.

[Einar Thorsrud]

Hi,

I have not had a chance to get new info from the maintainer now, but the pipelining change that was described before should be the only relevant change as far as I can see. You can try to do things on the nRF side as well though, like setting CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y.

[Dagan Raviv]

Hi,

Upgrading the app to latest version (1.5.2) solved the matter :)