Don't think this approach will prevent devices with a hardcoded DNS address, as they are not asking for a DNS server. I have thermostats with hardcoded DNS and they bypass the pihole server with this...

My experience has been the controller uses the default password admin/admin during the first attempt to adopt. If you have changed the device's password in standalone mode, it will fail and then ask...

@NikosK When you adopt a device all previous setting will be lost because they need to be in sync, and may not be compatible, with the controller settings. So adopt first then make all required...

@Miyelani Give the OC200 a static IP address and access to the internet.

Yes, the OC200 running 24/7.

@Derega58 "So - is cloud connection in Omada mandatory?" The cloud is not required. You don't need to setup a cloud account or you can have a cloud account and keep it turned off. If you want to...