Demonstration of Low-Complexity LED-to-LED Two-Way Visible Light Communication System

In this paper, we present and evaluate a practical two-way communication system that employs LED as both transmitting and receiving device. Specially, by employing analog switch to isolate transmitting - receiving circuits and using microcontroller to control two different data flows going through this analog switch, we build a simple prototype consisting of two transceivers and several relays to demonstrate the possibility of efficiently delivering bi-directional text message between two computer users via one-hop and multi-hop through visible light communication channel. Our proposed system can be further developed to transfer multimedia data which can be considered as an alternative to radio as communication medium.