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Li-Fi Based Smart Indoor Navigation System for Visually Impaired People

A new emerging technology named Light Fidelity(Li-Fi) has been proposed to overcome the drawbacks of Wi-Fi technology, which provides faster data transmission and is based completely on the concept of binary data serving. Li-Fi works wherever the light is present and provides better bandwidth, efficiency, availability and security than Wi-Fi. Taking the advantages of this technology, Indoor navigation is provided for visually impaired people. The transmitter unit can be fitted to the wall or celling which modulates information and transmit it through LED which acts as communication source. Silicon photo diode serves as a receiving element and the receiver unit demodulates the modulated information and give audio response to the visually impaired people. A solution in this project is a simple user friendly, smart guidance stick is designed and Li-Fi communication is implemented to help visually impaired people by using AT Mega microcontroller.