Introduction

This project addresses women's personal safety through a comprehensive tracking and emergency alert system. The device combines real-time GPS location tracking with GSM-based SMS communication to enable rapid emergency response. When activated via a dedicated panic button, the system immediately sends the user's GPS coordinates via SMS to pre-configured emergency contacts and triggers an audible buzzer alarm. The system also monitors environmental conditions through temperature and humidity sensors, logs all data to Firebase for tracking history, and provides real-time status information on an OLED display. WiFi connectivity enables cloud data synchronization for comprehensive monitoring through a web dashboard.

System Overview

Aim and Objectives

Aim:
Design and develop a portable women safety device with GPS tracking, GSM emergency alerts, and cloud-based monitoring for enhanced personal security.

Objectives:

• Implement real-time GPS location tracking using TinyGPS++ library for accurate coordinate reporting.
• Enable emergency SMS alerts via SIM800L GSM module with one-button panic activation.
• Monitor environmental conditions (temperature, humidity) using AM2302 sensor.
• Display real-time device status, location, and environmental data on OLED screen.
• Log all tracking and environmental data to Firebase Realtime Database for historical records.
• Implement configurable buzzer alert system with timing thresholds for attention drawing.
• Synchronize device time via NTP for accurate event timestamping.

Features & Deliverables

• GPS Location Tracking: Real-time coordinate tracking with TinyGPS++ for accurate positioning.
• Emergency SMS Alerts: One-button panic activation sends GPS coordinates to emergency contacts via GSM.
• Audible Alarm: Buzzer sounds during emergency activation to draw attention and deter threats.
• Environmental Monitoring: AM2302 sensor tracks temperature and humidity for situational context.
• OLED Status Display: 128x64 OLED shows GPS status, location, time, and environmental data.
• Cloud Data Logging: Firebase integration for tracking history and remote monitoring.
• Web Dashboard: Companion web application for real-time tracking and historical data review.
• NTP Time Sync: Accurate timestamping for all events and data records.

Process / Methodology

Hardware Assembly

Components: ESP32, GPS Module, SIM800L GSM, AM2302, OLED 128x64, Push Button, Buzzer, Battery/Power Supply.

• Configured GPS module with TinyGPS++ library for NMEA sentence parsing.
• Integrated SIM800L GSM module for SMS communication capability.
• Connected panic button with interrupt-based detection for instant response.
• Assembled in a compact portable form factor for easy carrying.

Software Development

• Developed firmware with multi-mode operation (normal monitoring, emergency alert).
• Implemented SMS formatting with Google Maps link embedding for easy location sharing.
• Programmed WiFi connectivity with Firebase data synchronization.
• Created web dashboard for remote monitoring and tracking history visualization.

Testing & Calibration

• Tested GPS accuracy in various environments (urban, suburban, indoor).
• Validated SMS delivery reliability across different network conditions.
• Measured panic button response time from press to SMS delivery.

Challenges & Solutions

• Challenge: GPS signal acquisition delay in urban canyon environments.
  Solution: Implemented location caching and last-known-position reporting for instant initial response.
• Challenge: GSM module power spikes causing ESP32 brownout resets.
  Solution: Used separate voltage regulator with bulk capacitors for GSM module power supply.
• Challenge: Battery life optimization for all-day portable operation.
  Solution: Implemented adaptive polling intervals—frequent during movement, reduced during stationary periods.

Results & Impact

• Rapid Response: Emergency SMS with GPS coordinates sent within seconds of panic button activation.
• Accurate Tracking: GPS provided reliable location data with meter-level accuracy in open areas.
• Deterrent Effect: Audible buzzer alarm served as an effective attention-drawing mechanism.
• Historical Tracking: Firebase web dashboard enabled review of movement patterns and emergency events.

Future Enhancements

• Add fall detection using accelerometer for automatic emergency triggering.
• Implement geofencing with automatic alerts when leaving safe zones.
• Develop companion mobile app with real-time map tracking.
• Miniaturize into jewelry-sized wearable (pendant, bracelet) for discreet carrying.

Demonstration / Access

• GitHub Repository: Coming soon
• Live Demonstration Video: Coming soon

Thank You for Visiting My Portfolio

I sincerely appreciate you taking the time to explore my portfolio and learn about my work and expertise. If you have any questions or wish to discuss potential collaborations, please feel free to reach out via the Contact section.

Best regards,
Damilare Lekan, Adekeye.