Create sysupgrade package from running router

I have two same router running in some modified chinese version of openwrt .
one of the router has lower version and I want to upgrade it to latest version that is runnig in another router
I tried restore rootfs but somehow the firmware developer block "mtd write" and router crashed
is there anyway I can build sysupgrade image from running router
or do you have any easier way to do so ?

You should ask the OEM. We cannot possibly support unknown firmware of unknown origin.

  • What is the make/model of the device?
  • Is it listed as supported in the Table of Hardware?
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