Abstract
Blindness involves the loss of vision. Mobility and independence have long been challenges for blind and visually impaired people. This project proposes BlinDar, a smart Electronic Travel Aid (ETA) to improve their lives. Equipped with Internet of Things technology, BlinDar aims to help the visually impaired navigate indoor and outdoor spaces freely. This highly efficient, reliable, fast-responding, lightweight, low-power, and cost-effective device uses ultrasonic sensors to detect obstacles and potholes within 2 meters. GPS and an ESP32 Wi-Fi module share the user's location with the cloud. An MQ2 gas sensor detects fires along the path, while an RF transmitter/receiver helps locate a misplaced walking stick. The Arduino Mega2560 microcontroller, with its 54 digital I/O pins, provides easy interfacing between all components. . KeyWords: Blindness, Smart Stick, BlinDar, GPS, ESP8266, Internet of Things, RF Tx/Rx, MQ2.
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