Bi-directional Li-fi Communication For Transmitting Data, Audio Information Using Arduino

This project demonstrates a dual-function LiFi (Light Fidelity) communication system capable of transmitting both text and audio signals using visible light. The system comprises two separate kits: a LiFi transmitter and a LiFi receiver, each built using Arduino microcontrollers. On the transmitter side, an LCD display and a 3.5mm jack are integrated, enabling the system to send textual data serially and audio signals through connected earphones. The text is transmitted using modulated LED light, while the audio signal is directly coupled into the light signal. On the receiver side, a photodiode captures the incoming light signal, which is then decoded by the Arduino. The received text is displayed on an LCD screen, while the audio signal is filtered and amplified to be played through a speaker. This project showcases the potential of LiFi technology as an alternative wireless communication method for short-range, secure, and interference-free transmission of both digital and analog data, highlighting its application in modern communication systems.