2. Wireless system: Point-to-point radio frequency technology is adopted without rewiring, which is mainly used to control some specific appliances or lights, mainly wireless technology represented by ZigBee. These two technologies are often used, and some people say that they will use WIFI to connect to the internet, which is ok for ordinary small systems, such as a TV.
3. Power carrier system: it is not widely used in smart home systems. There is no need to rewire, and the control signal is mainly transmitted by the existing power cord of the family to realize the control and management of household appliances and lights. The PLCBUS technology in Holland is the most stable.