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

[tmomas]

@Magoo

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.

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.