OpenWrt and Asus RT-AC1200g+ Is it possible and how to install?

Hey everyone !

I bought a Asus RT-AC1200g+ two years ago, and I still struggle to make the QoS work properly. So I was thinking to upgrade to OpenWrt to try the performance differences.

I saw on the archives of the forum that a dev was working on this router 4 years ago and on this page (if I understand correctly, it says that my router is some kidn of clone of the RT-AC57U. So I had hope that OpenWrt would work.

I tried installing it after manually clearing the vram of my router, and the file seem to have upload correctly, I mean the bar was moving and it said that was done.

But when I tried to access Luci I got redirected to asus which says that I need to clear my vram and reinstall from their website or something like that.

I tried the process again, manually clearing my vram and reinstalling OpenWrt but nothing changed.

To be honest I followed this video cause I'm a little bit lost, I don't know if this is a good video though. It seems but what do I know.

Thank you for your time !

The linked pages mentions RT-AC1200GU, not RT-AC1200GP (or G+).

GU and GP are completely different animals:

https://wikidevi.wi-cat.ru/ASUS_RT-AC1200GP (BCM47189)
https://wikidevi.wi-cat.ru/ASUS_RT-AC1200GU (MT7621AT)

This means that the image for the RT-AC57U will never ever work on the GP.

Thank you for the clarification. Wherever I search on the internet I can't find anything about an alternative firmware for this router...

Wouldn't I be better, at this point, to just buy another one ? One that is supported by OpenWrt for example ?
Maybe I'm blind or don't know how to search for this things on google, but more than 4 hours of research today, for nothing x)

Thanks again for your help !

IMHO: Yes.

Some inspiration: https://openwrt.org/toh/views/toh_available_16128

For hardware recommendations please open a new topic in the Hardware Questions and Recommendations category of this forum.
Please see https://openwrt.org/faq/which_router_should_i_buy before asking the forum.
This way you will get better recommendations and come to a quicker solution.

Thank you for your time sir, I'll be doing this !

Since asus provide source code (some kind at least) for it, wouldn't be possible?
https://dlcdnets.asus.com/pub/ASUS/wireless/RT-AC1200G+/GPL_RT-AC1200GPlus_300438251610.zip

There is virtually no chance that either of its WLAN cards will ever be supported, if you accept that as a fact, the rest could be supported (but I doubt anyone will share your enthusiasm for this device and port OpenWrt to it for you, so it would be up to you to do the development work).

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