X10 is a protocol for communication among electronic devices used for home automation (domotics). It primarily uses power line wiring for signaling and control, where the signals involve brief radio frequency bursts representing digital information. A wireless radio-based protocol transport is also defined.
X10 modules (clockwise from upper left): An original BSR lamp module, a "chime module", a recent lamp module, an outlet module
X10 modules: The interior of an appliance module (note the impulse relay on the left) and a lamp module (note the TRIAC and heat sink)
A four-channel radio switch and radio-to-power-line transponder
X10 modules: A lamp socket module
Home automation or domotics is building automation for a home. A home automation system will monitor and/or control home attributes such as lighting, climate, entertainment systems, and appliances. It may also include home security such as access control and alarm systems.
CITIB-AMX control panel
Nest Learning Thermostat showing weather's impact on energy usage
Ring video doorbell with Wi-Fi camera
August Home smart lock