Numpty WiFi Question

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I should know the answer to this.... but I’m not entirely sure.

A friend with a barn 50m from his house needs WiFi in there. A repeater is too flakey - we’ve tried it and it’s not stable.

He has ducting to the barn, so we’re thinking to run Ethernet out there. One end into the back of the router and at the other an ‘access point’.

I’ve never used or set up an access point, I assume as soon as it’s wired into the router it’s just replicating the signal? As simple as that?

No other functionality is needed other than that.

What might I have misunderstood?

Thanks.

[NDA]

I do have an old router - will have a go with that.

[NDA]

Powerline adapters don't work in this setting. The barn has it's own fusebox etc and the adapters won't bridge that gap.

Ethernet to an access point seems to be the solution.

[NDA]

Kermit power said:

If I went for one of these Ubiquiti things, would I be able to replace both the current SSIDs and the Powerlines with a single system powerful enough to cover the whole house?

Yes.

I have the BT Whole Home system with 4 discs. It is a 'mesh' system, so the same SSID and devices don't cling on to weak signals, they switch seamlessly. The wifi has never been better in my house - a strong and fast signal throughout. I have been through a variety of power line systems and repeaters - the mesh technology is by far the best. I don't know much about the Ubiquiti system, but it's a bit more costly I think - essentially the same as the BT system though.

[NDA]

Ubiquiti software doesn't support Mac/IOS as far as I can see....