Light emitting diodes are set to penetrate many areas of everyday life. An interesting property of these devices in addition to their lightening capabilities is that they can also be utilized for data transmissions as well. This paper is to build a system which carries out communication using visible light that are employed for indoor illuminations. This paper is designed as a prototype LI-FI system to transfer data's as well as Files. The idea is to send data's and file as serial data using UART serial communication from one PC to another PC.