The solution was to create a separate WLAN supporting only 2.4GHz and WPA-PSK-Auto (not WPA2). The printer then connects with no problem.

Regarding https://www.tp-link.com/us/support/faq/2915/ the recommendation is to use nssm.exe. However that program is no longer being maintained and is considered a mild to moderate security risk. I...

I replaced an old Ubiquiti Unifi AP-AC-LR with a TP-Link EAP670. My HP8600 printer will not connect to the network, failing at the authentication phase. It detects the network and accepts the...