Here I've used a car central door locking actuator bought for about £6 off ebay, which simply physically pushes a standard CX201 coax switch lever. It is reversed using a DPDT relay module. All of this runs from a small Scratch program on a Rasberry Pi, but better still you could use an arduino.

Warning: I killed about 3 actuators during this project because i left voltage on the actuator after it had moved causing it to burn out. The program needs ensuring it removes power as soon as the actuator has switched position

Here I've used a radio controlled car servo and steering rod, which simply physically pushes a standard CX201 coax switch lever. It is controlled using an arduino, plus a 12v relay provides the closed (short circuit, closed contact) connection to trigger the arduino program o move the servo. The 12v relay is triggered from a wifi enabled 12v switch that can be selected from a web browser (remotely).