For IOT AP I use an old olinuxino with MT7612U 2.4G wifi dongle running Arch Linux ARM as most of my wifi iot devices run on 2.4Ghz wifi anyway.
Then I have a normal wifi in a ASUS PRIME N100I-D D4 x86 low power mobo which I also use as a media box. It has a Mediatek mt7916 wifi 6e-capable (but running wifi 6 currently anyway) M.2 card by AsiaRF in a short cable extender. I took a long time to find a well-supported wifi card.
Then I have a third box which is also a router and has normal 5GHz AP. It also hosts a radius daemon used by all APs which assigns MAC addresses to VLANs, optionally forces them to their unique passphrases. All boxes are connected by LAN cables.
It works perfectly with no issues but it took gradual smaller improvements over many days until I ended up with this setup. It would also be possible to cram everything into a single box if the area to be covered isn't very large.
Then I have a normal wifi in a ASUS PRIME N100I-D D4 x86 low power mobo which I also use as a media box. It has a Mediatek mt7916 wifi 6e-capable (but running wifi 6 currently anyway) M.2 card by AsiaRF in a short cable extender. I took a long time to find a well-supported wifi card.
Then I have a third box which is also a router and has normal 5GHz AP. It also hosts a radius daemon used by all APs which assigns MAC addresses to VLANs, optionally forces them to their unique passphrases. All boxes are connected by LAN cables.
It works perfectly with no issues but it took gradual smaller improvements over many days until I ended up with this setup. It would also be possible to cram everything into a single box if the area to be covered isn't very large.