I am thinking about parking another WAP in an awkward place where it can fill in a black spot. But the proposed site for that WAP is going to be a real nightmare to reach with a long Ethernet cable. Not impossible, but the cable run would be ugly, cable would be in the way, it could get damaged and running it and protecting it would just be a complete pain. So the alternative is a wireless link from one of the existing WAPs to the new WAP.
In the past, I have done an outdoor link over a fairly long distance using three WAPs, a pair in windows of two buildings facing one another. Unfortunately they did not have directional antennae, which would have been too sensible, but the kit that I had worked well enough as the distances were not too challenging. I had two TP-Link 5GHz-only devices for this job, one in ‘client’ mode and the other as a normal WAP, the two forming a separate SSID of their own with no other stations on it. The WAP at the remote end was then linked with a short Ethernet cable to a high-end dual band ZyXEL WAP in the interior of the remote building and it was this third device that served stations on yet another SSID. I don’t want to go to that much complexity again for the new set up which is just extending the WLAN within the main house.
So I am wondering about using WDS which is something I have never had any experience of? Has anyone used it?
I noticed this article, about a different model of ZyXEL WAP, which discusses WDS
https://support.zyxel.eu/hc/en-us/articles/360001743273-How-to-configure-WDS-on-NWA3160-N-I don’t know if my ZyXEL NWA 3
560-N WAPs have such a ‘mode’ setting, can’t see it. If not, then I am out of luck. It seems a bit odd though.