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  Nlens

Nlens-Assistive-Vision-System

🧠 Overview

Nlens is an assistive system designed to help visually impaired individuals navigate safely using real-time obstacle detection and intuitive feedback mechanisms.

⚙️ Key Features

Ultrasonic-based obstacle detection Distance-based feedback system Visual alerts (Red & Green LEDs) Vibration feedback system Buzzer alert for danger detection Real-time monitoring dashboard

🚦 Working Principle

The system classifies distance into three zones:

100 cm (Safe Zone): Green LED ON 50–100 cm (Warning Zone): Red LED + intermittent vibration <50 cm (Danger Zone): Red LED + continuous vibration + buzzer

The buzzer is only activated in the danger zone to reduce noise and improve usability.

🧊 3D Design

The system features a compact wearable structure designed for:

Efficient component placement User comfort Portability

(See /design/ folder)

🔌 Circuit Design

The ultrasonic sensor is interfaced with the ESP8266, which processes distance and controls the output components.

(See /circuit/ folder)

📊 Monitoring Dashboard

Nlens includes a web-based dashboard for:

Real-time sensor data monitoring System visualization Debugging and analysis

(See /code/dashboard/ folder)

💻 Code

MicroPython code for ESP8266 Web dashboard implementation

(See /code/ folder)

🎥 Demo

A demonstration of the system in operation is available:

👉 [https://youtube.com/shorts/XXIS4dwjgeo?si=ramxIZ43642Muq5j]

🚀 Development Roadmap

Version 1 (Current)

Ultrasonic obstacle detection LED, vibration, and buzzer feedback Dashboard monitoring

Version 2

Camera-based object recognition Audio feedback via earpiece Solar-powered rechargeable system

Version 3

Brain-Computer Interface (BCI) integration

👤 Author

Abdul Rahman Olabidemi Hammed (Smartdon) Mechatronics Engineering, Bayero University Kano

Built With

• css
• esp8266
• html
• javascript
• micropython
• postgresql
• python