Need to know Mac address of Hydros 4 Controler

[Art Mulanax]

The Hydros 4 controller says it connected to my WiFi but I need to add its Mac address to my router's white list. Where can I find it?
The contro until is flashing alternate green for a few minutes then red for a few minutes.
Blue tooth seems to be working

 

[Danny]

Add the colons back in to the serial number for the MAC address.

 

[Art Mulanax]

Thanks for the help