A controller, a system, and a method of controlling the operation of the controller of an electric device. The method comprises: sending a user interface software packet stored in the controller's memory to a first external device; disassembling the user interface software packet in the first external device into executable user interface server software and user interface client software; sending the user interface client software from the first external device to a second portable external device; the user interface client software communicating with the user interface server software via a wireless radio connection between the first external device and the second portable external device; the user interface server software converting the commands issued by the user interface client software and transferring the commands to the controller's interface; and the controller executing an operation according to the converted command received via its interface.