app_update.bin isn't created

RE: app_update.bin isn't created

rajeev — Mon, 04 Aug 2025 18:31:38 GMT

If you are using `sysbuild,` app_update.bin is not generated. Instead, you will have zephyr.signed.bin located inside build/{your_app_name}/zephyr/zephyr.signed.bin.

If you are building without sysbuild then you will have app_update.bin generated and
will be inside the directory build/zephyr/app_update.bin.

Hope this clarifies your question.

RE: app_update.bin isn't created

Øyvind — Mon, 04 Aug 2025 14:36:35 GMT

Yes, that is correct. The nrf9151.signed.bin should be the file to use. Please test and let us know how it worked.

Kind regards,
Øyind

RE: app_update.bin isn't created

baeta — Mon, 04 Aug 2025 14:25:03 GMT

So inside the "dfu_application.zip" I have 2 files, one is the "manifest.json", and the other is the "nrf9151.signed.bin", is the "nrf9151.signed.bin" the one I should use to make a FOTA?

RE: app_update.bin isn't created

Øyvind — Mon, 04 Aug 2025 13:29:26 GMT

Hello,

have a look at the build/dfu_application.zip generated by the application. This Zip file contains both the MCUboot-compatible update images for one or more cores and a manifest describing its contents. See output build files for more information.

Kind regards,
Øyvind