BLi-Fi: Li-Fi-Based Home Navigation for Blind

Introduction: A key technological alternative to WiFi technology is Li-Fi (Light Fidelity), which is associated with the binary data executing mechanism that can prevail over the disadvantages of Wi-Fi due to its high-speed data transmission capacity, superior bandwidth and reliability. Methods: Keeping these dominant factors of Li-Fi technology in mind, we proposed a prototype of the system which is named BLi-Fi: Li-Fi-based indoor navigation for the blind. The proposed idea is to develop a system that enhances the easiness of indoor navigation for blind persons and this navigation technology uses visible light communication. Results: In the proposed system, we utilized an LED (light emitting diode) fitted at our home as an information transmitter and an LDR (light dependent resistor) fitted on the walking stick of the vision impaired person at residence as a data receiver for indoor navigation. Conclusion: Indoor location data information like room, hall, kitchen, etc. is embedded into the light rays transmitted by LED and the embedded system with a microcontroller having a visible light receiver at a walking stick collects the data, demodulates it and communicates through audio with the actual location to the vision impaired person.