Arduino Based Visible Light Communications Between Two Devices Using Li-Fi Technology

Data transmission through wireless medium has been prominently increasing in the current era due to many emerging technologies like Internet of Things (IoT). Most of the wireless communications happen through the air medium. Li-Fi (Light Fidelity) is a technology which transfers data using optical-like visible light. Data from the arduino can go through the light and a while later be received on the receiver side using any light-sensitive device like LDR or photodiode. In this paper, the data or picture from the arduino is sent using LED and keypad. It is decoded on the receiver side using LDR. Li-Fi uses visible light as a medium for the transmission of data. A LED can go probably as a light source and the photodiode goes probably as a receiver that gets light signals and decodes at the receiver side. Arduino is used for controlling the light at the transmitter side. At the receiver, the photodiode or Light-Dependent Resistor (LDR) changes over the received data into original information. A working prototype using arduino and LDR to transfer the alpha-numeric and image data through Li-Fi technology has been developed and presented in this paper.