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2. Wireless light switch - Wikipedia

   en.wikipedia.org/wiki/Wireless_light_switch

   Wireless light switch. Dimmer light switch with RF-based remote control [1] A wireless light switch is a light switch that commands a light or home appliance to turn itself off or on, instead of interrupting the power line going to the light fixture. There are different ways to communicate between the switch and the fixture: [2]

3. Remote control - Wikipedia

   en.wikipedia.org/wiki/Remote_control

   An air conditioning unit remote control. In electronics, a remote control (also known as a remote or clicker [1]) is an electronic device used to operate another device from a distance, usually wirelessly. In consumer electronics, a remote control can be used to operate devices such as a television set, DVD player or other digital home media ...

4. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   v. t. e. In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. [1] [2] The most common type of switch is an electromechanical device consisting of one or more sets of movable ...

5. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   A wireless light switch provides remote control of lighting using a hand-held transmitter. While the controlling device may be a unit dedicated to this purpose, increasingly such switches may be controlled by the technology (such as Bluetooth or Wi-Fi) now found in smartphones.

6. Remote terminal unit - Wikipedia

   en.wikipedia.org/wiki/Remote_Terminal_Unit

   Remote terminal unit. A remote terminal unit ( RTU) is a microprocessor -controlled electronic device that interfaces objects in the physical world to a distributed control system or SCADA (supervisory control and data acquisition) system by transmitting telemetry data to a master system, and by using messages from the master supervisory system ...

7. Relay - Wikipedia

   en.wikipedia.org/wiki/Relay

   Relay. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.