Hi. I have checked the manual for this router on wiki openwrt. The manual said that I need the version v6.46 or below. But where to get it ? Mikrotik official site can provide only 6.49.10 as minimal
in my world, 6.49.10 is above 6.46...
Sorry, " OpenWrt is not compatible with the bootloader of RouterOS v7 or v6.46 or above. Do NOT upgrade the firmware on your device past RouterOS v6.45.8 or, if you did, downgrade to RouterOS Firmware v6.45.8 or earlier before installing OpenWrt."
Just edit the link to 6.45.8.
but just to check, what is the base version your rb750gr3 came with?
Factory firmware 6.48.6
It's not recommended to netinstall to a version below the factory version, just in case components have changed that are not supported in that prior version.
mikrotik have been known to change nand flash and other things in newer revisions of hardware.
Understand. Am I right with that: when I downgrade to 6.48.6, just use netinstall to update to openwrt 23.05.4 ?
I would recommend trying from 6.48.6 first.
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