I just curious because DD-WRT and Koolshare-Merlin are supported by R8500. (I don't know how they can do it) After I read this link, (Build for Linksys EA9500) "Build for Linksys EA9500" and "https://serialize.wordpress.com/tag/openwrt/" these solutions might apply to R8500 too, or I missed something.
Netgear R8500 source code "https://www.downloads.netgear.com/files/GPL/R8500-V126.96.36.199_1.0.11_GPL.zip", It will be good for us to patch our code.
And we can easily access CFE R8500 by USB-TTL too.
I bought two bricked R8500 and de-bricked it by USB-TTL and Minicom.
I use Koolshare-Merlin firmware (https://firmware.koolshare.cn/Koolshare_Merlin_Legacy_380/Netgear/R8500/) for my main router instead of DD-WRT because I like the smart-connect feature, which seems very stable for my use and another one for testing.
After trial build firmware Linksys EA9500 from Npcomplete's GitHub, I think we could do the same thing as he did.
Could anyone please guide me on how to do it?
I can dump whatever data from R8500 to build OpenWRT if you want me to do it.