A switch and a switch actuator, where the switch has a changeable status, the switch connected to electrical conductors to communicate the switch status.

A system controller detects a state of the switch and controls operation of one or more systems in a structure based on the state of the switch.

The system includes a master module having a power supply, a switch, and a wireless communicator configured to communicate a switch state.

The external device can either include a single button dedicated to controlling the desktop KVM switch or indicate a state of the KVM switch.

The circuit board can also include a microcontroller to control a state of the switch (615).

A feedback signal corresponding to a state of the switch (68) is generated by a feedback circuit (70).

The system controller can detect the state of the switch by detecting a position of a magnet of the switch.

A state of the enable switch is based on a comparison of the first current to a second current being drawn through the power line by the pump motor.

In this way, the state of the switch may be set when the target is in a power-off condition, and the target is able to determine the state of the switch when the target is activated.

The dimmer switch preferably controls the state of the semiconductor switch in response to either a toggle of any of the other switches in the system or an actuation of a toggle button of the dimmer switch.

The control block can set the state of the switch.