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X10 wireless devices send data packets that are nearly identical to the NEC IR protocol used by many IR remotes, and a radio receiver then provides a bridge which translates these radio packets to ordinary X10 power line control packets. The wireless protocol operates at a frequency of 310 MHz in the U.S. and 433.92 MHz in European systems.
Wireless light switches eliminate the wire from the light to the switch location. This is useful in remodelling situations where new wiring can be a hassle. Rather than tearing down a wall to gain access to the wires, a wireless switch can be used. This avoids any need to access wires and makes remodelling fast and simple.
Insteon is an integrated dual-mesh (formerly referred to as "dual-band") network that combines wireless radio frequency (RF) and a building's existing electrical wiring, [7] in which all devices are peers and each device independently transmits, receives, and repeats messages.
X10 Wireless Technology, Inc. was an American subsidiary of a Hong Kong-Bermuda company best known for marketing wireless video cameras using controversial pop-under advertisements. Also marketed a remote control system for lamps and appliances that used the home's electrical wiring as the signaling network, using the X10 industry standard ...
Z-Wave is a wireless communications protocol used primarily for residential and commercial building automation. It is a mesh network using low-energy radio waves to communicate from device to device, [2] allowing for wireless control of smart home devices, such as smart lights, security systems, thermostats, sensors, smart door locks, and garage door openers.
Wireless (WiFi) modem - an automated short range digital data transmitter and receiver on a portable wireless device that communicates by microwaves with a nearby access point, a router or gateway, connecting the portable device with a local computer network to exchange data with other devices.
The first radio transmitters could not transmit audio (sound) like modern AM and FM transmitters, and instead transmitted information by radiotelegraphy; the transmitter was turned on and off rapidly using a switch called a telegraph key, creating different length pulses of radio waves ("dots" and "dashes") which spelled out text messages in Morse code.
In general a wireless power system consists of a "transmitter" device connected to a source of power such as a mains power line, which converts the power to a time-varying electromagnetic field, and one or more "receiver" devices which receive the power and convert it back to DC or AC electric current which is used by an electrical load.
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