I have a Lynksys MR8300 running OpenWRT 24.10.x. I’ve always updated the router with a sysupgrade image build with the firmware selector. Can I use owut to update this dual partitions router (and have the same result)?
owut just automates all steps in downloading image from selector and uploading to router
Yes. Basically, owut does exactly what you described doing manually. It goes to the build server and asks for firmware with the package set matching yours, then, downloads that firmware and runs a local sysupgrade.
The difference is, owut has some smarts built into it, so it can work its way through package replacements. For example, at one point, wolfssl was replaced with mbedtls, so when upgrading an installation containing wolfssl packages, owut would stop and ask whether a wolfssl package should be replaced with an mbedtls package. Firmware Selector might actually throw an Impossible package selection error in this situation…
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If the owut upgrade doesn't invoke sysupgrade properly (do you use any parameters when you run it?), then you can just do owut download which generates the new image, downloads it into /tmp/firmware.bin, verifies it and stops. After that, you can look at the binary, archive it or sysupgrade <additional-parameters> /tmp/firmware.bin...
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