If you have an existing mesh network up and running, new devices can reach the controller using the WiFi network of the mesh network.
This is for instance if you have a mesh with one node and want to add additional nodes to the network.
Simply start the new device up where it is able to reach the WiFi network of the existing mesh network. (No WAN cable plugged in)
The LED should first alternate flash for a while and then start to flash twice and even three times.
This is an indication that it tries to reach the controller using the WiFi network.
Again if the device has not yet been onboarded it will be listed in a similar manner to the first one but the Gateway column will be shown as No meaning the device managed to reach the controller through a mesh network.
You can now again decide (like in the first case) where the device needs to go and what it should function as.