The approach requires wireless LAN environment applications such as office buildings, stadiums, command posts and other places. However, if the wireless LAN is the one with Internet access port, then the technology can achieve a wide range of remote wireless control, as shown in Fig. 2 (b).
C. RF-Control (radio frequency wireless control)
RF wireless remote control technology is mainly used in about 50 to 100 meters short-range wireless control, mainly used in hand-held or wall touch screens embedded control terminal.
Figure