International Journal of Scientific Research and Engineering Development

Li-Fi (Light Fidelity) is an innovative wireless communication technology that utilizes visible light spectrum for high-speed data transmission. Unlike conventional Wi-Fi systems, which depend on radio frequency signals, Li-Fi transmits data using rapid modulation of LED light. This project presents the design and implementation of a low-cost Li-Fi communication system using Arduino UNO, LED, LDR sensor module LM393, and 16x2 LCD display with I2C module. The proposed system consists of transmitter and receiver sections. In the transmitter section, text data entered through serial communication is converted into binary form and transmitted through LED light pulses. The receiver section uses an LDR sensor to detect variations in light intensity and reconstruct the transmitted message. The decoded data is displayed on an LCD module. Experimental results demonstrate successful short-range optical communication under controlled environmental conditions. The proposed system is cost-effective, secure, energy-efficient, and suitable for future indoor communication applications.

Dr.Bhushan V. Patil, Aniket Chaudhari, Shwetali Bhalkar, Suvarna Patil,"Design and Implementation of Li-Fi Communication System using Arduino Uno" International Journal of Scientific Research and Engineering Development, V9(3): Page(1136-1140) May-June 2026. ISSN: 2581-7175. www.ijsred.com. Published by Scientific and Academic Research Publishing.