Can someone help me find the setting so I can get devices on my 5GHz band network (my computer) to talk to older devices on the 2.4Ghz band network (my printer).
Have found I need to disable WLAN Partition, but that setting seems to be for DLink devices and having trawled through the advanced settings in this TPLink device, I can't find anything obviously similar.
Have a look in the manual 11. 5. Interface Grouping.
Go to Advanced > Network > Interface Grouping to open the configuration page where some interfaces can be grouped together.
I would expect that grouping is disabled by default.
Does you printer have an ip address reservation?
Can you ping the printer from your computer using the printer's ip address?