In reply to a post by Pheasant:

As you say. 2.4 also has better range/penetration than 5 and the data throughput requirement on many IOT devices is pretty humble. So 2.4 fits the bill.

That is true. 2.4 does have a better range which is why I preferred my old TP link router, looking at the clients list the one using the most data is my blink camera hub and that is 150Mb/s bother ways. The plugs are around 30 if that

In reply to a post by Pheasant:

It’s not spoofing per se and these devices aren’t clever enough (or have the need) for any MAC randomisation algorithms ala Apple. It’s not very high on my list of priorities as it works as intended.

Fair enough.

In reply to a post by zyborg47:

I think the router is just picking them up, just like your phone would pick up a Wi-Fi signal.

I doubt they are transmitting their own Service Set Identifier (SSID) which is what your phone picks up from a router, unless this is some sort of strange "configuration mode" and they've been factory reset.

If you are getting them listed in your 'active device' list on the router then they have your WPA2/3 passphrase. (or you have another network, e.g. Guest, with no security).

In reply to a post by jchamier:

I doubt they are transmitting their own Service Set Identifier (SSID) which is what your phone picks up from a router, unless this is some sort of strange "configuration mode" and they've been factory reset.

If you are getting them listed in your 'active device' list on the router then they have your WPA2/3 passphrase. (or you have another network, e.g. Guest, with no security).

Well, they have vanished anyway, I have no idea why they were there but I doubt very much if someone had connected them to my router. Maybe just one of those strange things.