Merging Different Hex Files (Sysbuild)

RE: Merging Different Hex Files (Sysbuild)

Simon D-M — Fri, 23 Oct 2026 08:22:47 GMT

Hi,

It seems you can try to use "mergehex" (link) to merge them together. This tool is from an archived project (nRF command line tool) but I wasn't able to find any replacement in nRFUtil.

But again, I can't give any guarantee that it will work, so if you can please stick with the current version of MCUboot.

Best regards,

Simon

RE: Merging Different Hex Files (Sysbuild)

Amira R. — Thu, 22 Oct 2026 16:32:05 GMT

Hi Simon,

Thank you for getting back to me! I understand the compatibility concerns and am okay with the versions potentially not working together. I more so wanted better insight into the sysbuild building system and wanted to know if the merging step is something that can be done manually.

RE: Merging Different Hex Files (Sysbuild)

Simon D-M — Thu, 22 Oct 2026 14:27:47 GMT

Hi,

It is theoretically it is possible to merge the hex together, but I would recommend to not do it.

There has been a major NCS version change, and we don't give any guarantee that the old MCUboot version will work with this more recent NCS version.

Best regards,

Simon