DFU OTA

RE: DFU OTA

JIMMY01 — Wed, 29 Jul 2026 11:56:54 GMT

OK， I will forwad it to my customer, and I will put the feedback here if it can help him.

RE: DFU OTA

Vidar Berg — Wed, 29 Jul 2026 11:51:14 GMT

In that case, the apk may be using an outdated version of the DFU library. If you want to test with SHA256 on the nRF54L you need to patch the SDK, please see this open PR: https://github.com/nrfconnect/sdk-nrf/pull/28618 for how it can be done.

RE: DFU OTA

JIMMY01 — Wed, 29 Jul 2026 11:39:21 GMT

I believe it's ED25519 signed method as the default. So, it's SHA512(0x12) hash, not SHA256(0x10). But my customer's apk requires SHA256 hash.

RE: DFU OTA

Vidar Berg — Wed, 29 Jul 2026 11:37:22 GMT

Hello,

The error suggests that you are trying to upload an unsigned binary. Do you have a file named zephyr.signed.bin and dfu_application.zip in your build output? These contain the signed application image (https://nrfconnectdocs.nordicsemi.com/ncs/latest/nrf/app_dev/config_and_build/output_build_files.html)

Best regards,

Vidar