nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

RE: nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

Mike Pulice — Wed, 20 Sep 2023 15:59:28 GMT

We are using nRF Connect SDK 2.3.0
DFU is with MCUBoot

I have a 5340 DK so I will try that later today and post back later.

RE: nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

Einar Thorsrud — Wed, 20 Sep 2023 07:30:04 GMT

I see. I have not seen any reports of this before, nor am I able to reproduce when I test with a nRF5340 DK and the SMP Server Sample with Bluetooth transport. Can you explain more detail about how you do DFU and which SDK version you are using? Do you see the same if you test on a DK instead of your custom board?

RE: nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

Mike Pulice — Tue, 19 Sep 2023 14:32:19 GMT

[quote userid="7377" url="~/f/nordic-q-a/103894/nrf5340-ble-dfu-unable-to-enable-bluetooth-after-initial-reset/446683"]Do you just update with nRF Connect for mobile (so that the app resets as part of the upgrade procedure), and that triggers the issue?[/quote]

Yes, the regular reset that the app performs as part of the upgrade procedure.

[quote userid="7377" url="~/f/nordic-q-a/103894/nrf5340-ble-dfu-unable-to-enable-bluetooth-after-initial-reset/446683"]Also, do you see the same if you perform a soft reset in another way? And do you see the same behavior with different devices?[/quote]

Only with MCUBoot BLE DFU and other devices meaning our devices? All of our devices behave the same way.

[quote userid="7377" url="~/f/nordic-q-a/103894/nrf5340-ble-dfu-unable-to-enable-bluetooth-after-initial-reset/446683"]Also, do you see the same if you perform a soft reset in another way?[/quote]

I did experiments with soft resets with the command line tool and segger tools and this did not happen, which led me to believe it is something with how the device is reset by the nRF Connect for mobile doing MCUBoot DFU.

That erratum seems to be an issue, depending on how nRF Connect for Mobile performs the reset.

RE: nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

Einar Thorsrud — Tue, 19 Sep 2023 13:42:48 GMT

Hi,

Do you just update with nRF Connect for mobile (so that the app resets as part of the upgrade procedure), and that triggers the issue? Or does it happen in another way? Also, do you see the same if you perform a soft reset in another way? And do you see the same behavior with different devices?

Without knowing more it sounds like this could be caused by erratum 161. This will be properly handled in nRF Connect SDK 2.5.0 when that is released.