NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

RE: NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

Jonas Hoefer — Mon, 04 Jul 2022 12:58:08 GMT

Hello,

As this request is 2 years old, I was wondering if there is a new option to achieve this by now?

Thanks in advance!

Jonas

RE: NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

MattiasE — Wed, 24 Jun 2020 06:31:51 GMT

Okay I see. I think dual bank is not feasible for us since I believe our application will be a bit more complex than a simple beacon and thus take more than half the flash. We will probably need to go with the old nRF5 SDK in that case.

Thanks for your help.

RE: NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

Sigurd — Tue, 23 Jun 2020 09:30:17 GMT

[quote user="MattiasE"]If we want to update our application over BLE are we required to use the old nRF SDK?[/quote]

We don't have any solution that does not require dual bank. The whole app image(Zephyr Host+LL+ your own application) need to be part of the DFU. How large the image will be, will depend on both your application, and how you configure the Zephyr Host +LL. Depending on how much Bluetooth functionality you need, the Zephyr Host+LL can be configured to be very small. E.g. a simple beacon application is only around 50 kB.

RE: NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

MattiasE — Mon, 22 Jun 2020 06:28:01 GMT

Yes, that is correct. With nRF5 SDK we had no need to update the SoftDevice. Only the application.

That is the question. Since the Bluetooth Link Layer + Bluetooth Host is large, multiple copies in the nRF52810 flash is not possible. I have found no way to share the Bluetooth stack between bootloader and application in your documentation. If we want to update our application over BLE are we required to use the old nRF SDK?

Thanks for your reply

RE: NCS (Zephyr) + DFU over BLE + nRF52810 (small flash)

Sigurd — Fri, 19 Jun 2020 13:24:10 GMT

Hi,

If I understand you correctly, with nRF5 SDK, you did an application DFU, without updating the SoftDevice. But with MCUBoot, the Application + Bluetooth Host + Bluetooth Link layer need to be part of the update, and this increases the total amount of flash needed for the DFU.

I will ask the bootloader developers about this and get back to you next week.