LI-FI BACKEND SECURITY AND SOUND TRANSFER

A Li-Fi based wireless communication system is designed to transmit data using light signals instead of traditional radio frequency waves. In many existing wireless systems, communication relies heavily on RF technologies such as Wi-Fi and Bluetooth, which can face issues like limited bandwidth, interference, and security vulnerabilities. This system utilizes light as a medium for data transmission, providing a faster, more secure, and interference-free alternative. The system uses an ESP32 microcontroller to generate and control data signals, which are transmitted through a high-power infrared LED. The light signal is modulated to represent digital data and sent through free space. On the receiving side, a photodiode detects the incoming light and converts it into electrical signals. These signals are then amplified using a transimpedance amplifier and processed through a comparator to obtain clean digital output, which is interpreted by another ESP32. The system ensures efficient point-to-point communication and demonstrates reliable data transfer over short distances. By reducing dependency on radio frequencies and enhancing data security, the Li-Fi based communication system provides a promising solution for next- generation wireless communication, especially in environments where RF communication is restricted or inefficient.