Project Description:

The Visitor Detection Device is an IoT-based security system designed to detect and alert homeowners or office personnel about the presence of visitors at the entrance. It enhances security, automation, and convenience by identifying motion or body presence and optionally sending notifications, recording footage, or sounding alerts.

It can be used at home, office, classrooms, or any restricted area where knowing about incoming people is important.

Key Features:

1. Motion or Presence Detection
   Uses PIR sensor, ultrasonic sensor, or IR sensor to detect visitor movement in front of the door or gate.

2. Optional Camera Module
   Captures an image or short video clip of the visitor, optionally stored on SD card or uploaded to the cloud.

3. Real-time Notifications
   Sends alerts via SMS, email, or mobile app (using platforms like Blynk or IFTTT) when someone is detected.

4. Buzzer or Audio Alert
   Activates a buzzer, chime, or voice alert to notify residents about the visitor.

5. Smart Logic
   Optional facial recognition, visitor logging, and filtering out false detections (e.g., due to pets or wind).

Technology Stack:

• Microcontroller: Arduino Uno / ESP32 / NodeMCU

• Sensors: PIR Sensor / Ultrasonic Sensor / IR Sensor

• Modules (optional):

  • GSM module (for SMS alerts)

  • ESP32-CAM (for camera and Wi-Fi functionality)

  • Buzzer or Speaker module

• Optional Backend:

  • Node.js / PHP with MySQL (for visitor log dashboard)

  • Firebase (for real-time alerts and image storage)

  • Mobile app using Flutter or React Native