Automatic Switch Prototype without Touch Assistance Wireless Fidelity (Wi-Fi) Signal

802.11 WLAN Standard is a wireless local area network signal, known as Wireless Fidelity (WiFi). One of the parameters contained in the WiFi signal is SSID. SSID or Service Set Identifier is the name used to identify a WiFi network. In this study utilizing SSID to control electrical devices, namely lights. The way this works is that the receiver will turn on the light if it detects an SSID polmed. The receiver unit is consists of Arduino Board, Relay and ESP8266. transmitter unit is an SSID-generating device, like a smart phone with has the hotspot feature activated and is the same as the SSID name with the receiving unit. Furthermore, the sensitivity of the receiver unit is set to find out at distance the lamp starts to turn on. The transmitter unit is shifted according to the experiment and the receiver unit stays in place. From the experimental results it was found that if sensitivity 1: RSL> -90 dBm, the lamp starts to light at a distance of 20 m, if sensitivity 2: RSL> -75 dBm then the lamp starts to light at a distance of 15 m, if sensitivity 3: RSL> -55 dBm then the lamp starts to light at a distance of 10 m.