Li-Fi Based Secure Communication System Using Arduino for High-Speed Data and Audio Transmission Applications

Abstract

The increasing demand for high-speed and secure wireless communication has driven the exploration of alternative technologies, with global data traffic expected to exceed 180 zettabytes annually and traditional RF-based systems facing challenges such as bandwidth limitations, interference, and security vulnerabilities. Traditional wireless communication systems like Wi-Fi and Bluetooth operate on radio frequencies, which are prone to interference, congestion, and potential security breaches due to signal leakage beyond physical boundaries. Furthermore, conventional systems may not provide sufficient bandwidth for high-speed data and audio transmission in dense environments. To address these challenges, the proposed Li-Fi communication based secure data and audio transmission system utilizes visible light communication integrated with the Arduino Uno using the UART protocol for efficient asynchronous data transfer. The system employs high-frequency LED flickering to transmit text (hexadecimal data) and audio signals through light waves, which are received and decoded by a photodetector at the receiver end. UART ensures reliable and synchronized communication between modules, enhancing system performance. This optical communication approach provides enhanced security since light signals do not penetrate walls, reducing the risk of interception. The system offers high-speed transmission, low interference, and improved data capacity, making it a robust solution for secure communication applications.