Abstract: Simply, Li-Fi is nothing but Wi-Fi using light. By using light data can transmit. German physic DR. HARALD HASS was invented Light Fidelity (Li-FI) Technology. This is very much latest technology in which light emitting diode can transmit data much faster and flexible as compare to Wi-Fi technology. Here we develop the application module of Li-Fi technology. In which data can transmit through LED and receive by using photo diode.

Keywords: Li-Fi, Wi-Fi, LED, ATMEGA328.