The one found on the german support site for EAP225 V3, it's REV 4.3.0 December 2018. Make sure to select V3 as the hardware version on top of the support site.

Set your PC to static IP 192.168.0.10, connect to the switch using its default IP 192.168.0.1, log into the web UI, change its password, set the switch's IP to an unused one of your network...

It's documented in the EAP225 User's Guide on page 17: Guest Network: With this option enabled, guest network will block clients from reaching any private IP subnet. This is different from AP...

Did you try to reset the switch? See this FAQ on how to restore factory defaults. Does the password work after resetting it?

Ah, I see the problem. Omada Controller 3.0.2 not only re-configures the EAP, but resets its software settings in the database for the IP of the EAP to factory defaults as soon as it discovers the...

jonas wrote Hi R1D2, Thank you for the suggestion. EAP115-Wall(EU) is still a selling model of EAP products, but please remember EAP115-Wall just have EU version.(Because it only support 86mm and EU...