🚨 GPS Impact Detection System

A real-time accident detection system using Arduino, GPS, GSM, and a Force-Sensitive Resistor (FSR).
When an impact is detected, the system automatically retrieves the GPS coordinates and sends an SMS alert containing the accident location.

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🧠 Overview

This project integrates:

• A Force-Sensitive Resistor (FSR) to detect impact or force.
• A GPS module to obtain location data.
• A GSM module to send SMS notifications.

When an accident occurs (FSR detects an impact beyond a defined threshold), the system automatically sends a message and location link via SMS to a predefined mobile number.

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⚙️ Hardware Components Required

Component	Description
Arduino board	e.g., Arduino Uno
GPS Module	NEO-6M GPS module
GSM Module	SIM800L GSM module
Force-Sensitive Resistor (FSR)	Detects pressure or impact
10kΩ Resistor	Used in the voltage divider circuit
Jumper Wires	For connections
USB Cable	Power supply for Arduino

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🔌 Circuit Connections

🛰️ GPS Module

GPS Pin	Arduino Pin
RX	D2 (TX)
TX	D3 (RX)
VCC	5V
GND	GND

📱 GSM Module

GSM Pin	Arduino Pin
RX	D9 (TX)
TX	D10 (RX)
VCC	5V
GND	GND

⚙️ Force-Sensitive Resistor (FSR)

FSR Pin	Arduino Pin
One leg	A0
Other leg	5V
10kΩ resistor	Between A0 and GND

⚠️ Note: Ensure the GSM module has a stable power source. Some modules may require 2A peak current during SMS transmission.

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🧩 Code Summary

Sketch Name: GPS-Impact-Detection-System
Version: 1.0.0
Author: Gerard James B. Paglingayen
Created: June 5, 2023
License: MIT License
Repository: GPS-Impact-Detection-System

Key Features

• Detects impact using an FSR sensor.
• Retrieves GPS coordinates using the NEO-6M module.
• Sends an SMS alert with a Google Maps location link.
• Adjustable impact sensitivity (FSR_THRESHOLD).

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🧰 Software Setup

1. Install Arduino IDE
2. Install required libraries:
   • SoftwareSerial
   • TinyGPS++
3. Open the sketch file: GPS-Impact-Detection-System.ino
4. Update the following line with your target phone number:

   const char* phoneNumber = "09XXXXXXXXX";

5. Select the correct Board and Port in Arduino IDE.
6. Upload the code to your Arduino.

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🛰️ Example Output

When an impact is detected:

My Name is Juan Dela Cruz. I got into an accident.
LOCATION:
https://www.google.com/maps/place/11.234567,122.345678
Message sent

If GPS data is unavailable:

No GPS data received. Check wiring.

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⚙️ Adjustable Parameters

Variable	Description	Default Value
FSR_THRESHOLD	Impact sensitivity threshold	500
phoneNumber	Recipient mobile number	(set manually)
GPSBaud	GPS baud rate	9600

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🧪 Future Enhancements

• Automatic call alert after severe impact
• Integration with IoT dashboard for live monitoring
• Data logging (impact time, speed, location)
• Battery backup and solar charging options

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👨‍💻 Author

Gerard James B. Paglingayen
DICT Trainer | IoT & Embedded Systems Developer
📍 Philippines

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🪪 License

This project is licensed under the MIT License.
Feel free to use, modify, and share it for educational or research purposes.