Biometric Attendance System Over IoT

This guide will help you create a Biometric Attendance System using IoT technology and Raspberry Pi. The system will use fingerprint sensors to record attendance automatically and send the data to a cloud service for easy management and monitoring.

Components Required

• Raspberry Pi (Model 3 or later)
• Fingerprint sensor module (e.g., GT521F32 or R305)
• Connecting wires and breadboard
• Power supply (for Raspberry Pi and sensors)
• Cloud service account (e.g., Google Sheets, Firebase, or AWS IoT)
• Optional: Display module (e.g., LCD or OLED) for showing attendance status

Setting Up the Hardware

Follow these steps to set up the hardware:

1. Connect the Fingerprint Sensor

   Attach the fingerprint sensor module to the Raspberry Pi using the GPIO pins or UART interface. Ensure correct wiring for data and power connections.

2. Connect the Display Module (Optional)

   If using a display module, connect it to the Raspberry Pi to show real-time status updates or prompts.

3. Power the System

   Ensure all components are powered correctly using appropriate power supplies.

Programming the Raspberry Pi

Write the code to interact with the fingerprint sensor and send attendance data to the cloud. Below is a basic example using Python:

                import time
                import requests
                from fingerprint_sensor import FingerprintSensor  # Adjust based on your sensor library

                # Configuration
                CLOUD_URL = "https://api.example.com/attendance"
                sensor = FingerprintSensor()

                def send_attendance_record(user_id):
                    response = requests.post(CLOUD_URL, json={"user_id": user_id, "timestamp": time.strftime("%Y-%m-%d %H:%M:%S")})
                    print(f"Attendance record sent to cloud: {response.status_code}")

                def main():
                    print("Starting Biometric Attendance System...")
                    while True:
                        user_id = sensor.scan_fingerprint()
                        if user_id:
                            print(f"Fingerprint detected: User ID {user_id}")
                            send_attendance_record(user_id)
                            time.sleep(5)  # Delay before next scan

                if __name__ == "__main__":
                    main()
            

This Python code reads data from the fingerprint sensor and sends attendance records to a cloud service. Adjust the code for your specific fingerprint sensor library and API requirements.

Setting Up Cloud Integration

To manage and view attendance records, integrate the system with a cloud service. Configure your cloud service to receive data from the Raspberry Pi and set up dashboards or reporting tools for monitoring attendance records.

Testing and Calibration

Test the system by enrolling fingerprints and recording attendance. Verify that data is accurately sent and recorded in the cloud. Adjust sensor settings and code parameters as needed for reliable performance.