Secure buttonless DFU operation fails when DFU service is enabled after initialization

RE: Secure buttonless DFU operation fails when DFU service is enabled after initialization

Einar Thorsrud — Mon, 24 Jan 2022 14:04:27 GMT

Hi Stefano,

That makes sense. You should have got an error returned when trying to add another UUID with the NRF_SDH_BLE_VS_UUID_COUNT being too low, though. So I suggest double checking that you properly check all return codes to avoid other bad surprises in the future (or risk spending longer than necessary tracking down bugs/errors in the future).

RE: Secure buttonless DFU operation fails when DFU service is enabled after initialization

ste2108 — Fri, 21 Jan 2022 14:42:04 GMT

Dear Einar,

Thanks for your answer. In the end what worked for me was to increase the NRF_SDH_BLE_VS_UUID_COUNT parameter in the sdk_config by the number of UUIDs added (I forgot that while adding the custom service). This was somehow troubling the DFU, even though the custom characteristic I added seemd to work fine anyhow. Do you have by any chance an explanation for that?

Thank you.

Regards,

Stefano

RE: Secure buttonless DFU operation fails when DFU service is enabled after initialization

Einar Thorsrud — Fri, 21 Jan 2022 13:00:33 GMT

Hi Stefano,

I do not see any explanation for this, and I was not able to reproduce it with a slightly modified buttonless example in nRF5 SDK 16.0.0 (see below). Perhaps you also do some other changes? Can you explain/show?

devzone.nordicsemi.com/.../2451.main.c.diff