BLE connection persistence during FOTA update

RE: BLE connection persistence during FOTA update

Ville Olo Health — Tue, 15 Oct 2024 12:58:57 GMT

Well I'll be! I don't know how I have missed that setting. Thank you!

RE: BLE connection persistence during FOTA update

Hung Bui — Tue, 15 Oct 2024 11:20:57 GMT

Hi Ville,
Did you use nRF Connect app to do DFU update or you used Device Manager.
There is an option to delete or not delete application data when doing DFU.
On nRF Connect app the default is to erase application data. You can change that by go to Settings -> Mcu Manager Options -> Erase application settings

On Device Manager , if you don't click on Factory reset it will not delete bond information.

RE: BLE connection persistence during FOTA update

Ville Olo Health — Tue, 15 Oct 2024 10:17:13 GMT

Ah, my question was worded a bit wrong. The connection is ok to sever but the device is unable to rebond with the new software even though the address stays the same. Is there a way to keep the bond information during the update? The problem might be on the central side.

RE: BLE connection persistence during FOTA update

Hung Bui — Tue, 15 Oct 2024 09:17:48 GMT

Hi Ville,

The original connection has to be terminate when doing DFU update that's unavoidable. It's because the chip has to be reset for the application to be replaced.

The question here is should the central device re-connect automatically. On normal working condition, if the device turn off and then turn back on, would the central reconnect automatically ?
Do you see any address change when the device get updated ? Do you do pairing/bonding between the two devices ? Do you need to re-bond after DFU update ?