Hi and thanks in advance for your patience and comments!

So, added a UAP AC AP LR from picked up from TM onto my Spark supplied VDSL modem - it's attached off one of the built-in router ports on a cable that runs from the office to the downstairs rumpus room at the far end of the house. I downloaded the controller software from Uniquiti and blundered my way setting up an SSID name and password and it just pretty much worked once I realised one of my patch cables was bad. Only issue is that the power cable's fit into the POE adapter is terrible - it easily falls out. Not sure if the socket has a defect as the pins look ok.

So at the moment the upstairs/left side of the house has better coverage from the Spark modem's (Huawei VDSL) somewhat weak 2.4GHz wifi and the downstairs/right side of the house has better coverage from the UAP's decent 2.4/5GHz. Not ideal for mobile devices that are moved between the two areas as it hangs onto the original network. So I figure I should get another UAP for upstairs, and have a couple of questions...

Does it matter what kind of UniFi AP I get? I mean, the downstairs one has 2.4GHz/5GHz but I don't really care if the upstairs one only does 2.4GHz as far as speed is concerned - as long as it won't confuse the devices?

Does the second unit need to be permanently connected to a wired LAN or can it mesh off the first unit? If the latter is that something tricky to configure? The controller software seems quite complex as  I guess it caters to enterprise use as well as simpletons.

Any other recommendations?

Thanks again,

JohnO