Brother printer won't connect to KVD21 Gateway

This link will provide visibility to the Arcadyan information: http://192.168.12.1/TMI/v1/gateway?get=all

The attachment I added to that one provides the command strings required to use Nater Tater's creative hack to do configuration changes to the gateway that are impossible or difficult to do otherwise. Watching the video he made helps out and I recommend checking that out. If you have the Arcadyan gateway that information is very helpful to have.

If you are okay to be limited by the configuration via the mobile application then that is fine too. Keep in mind if you were to make a mistake with the config all you would have to do is reset it to factory default and start over. It will generate a default configuration and you would be good to go again.