I'm looking for a new set of router/APs to cover a whole house in a mesh setup, that doesn't involve using an app, or creating an account with the manufacturer. It has to work locally, with the configuration accessible from a browser. I repeat, no app and no online accounts. Just devices that can act as a router + repeaters, that can be configured from a browser. A bonus would be to have SMA ports so that antennas can be connected to them.

The current setup consists of only two Asus RT-AC66U, and the range sucks. They'e getting old, I don't want more of these, and the one serving as a mesh repeater often stops responding for a few seconds. I made the mistake of buying a pack of TP-Link Deco and I ended up returning them because they require an app and online account to configure.

Any suggestion meeting those requirements will be appreciated.