Overview:

The Home Security & Intruder Alert System is an IoT-based safety solution that ensures real-time protection of homes by detecting unauthorized access or movement.
It uses motion sensors, cameras, and microcontrollers connected to the internet to detect intruders and immediately alert homeowners via SMS, email, or mobile notifications.

The system can also trigger alarms, lights, or security cameras when unusual activity is detected, providing a smart, automated, and efficient way to enhance home security.

This project combines IoT, sensors, and cloud-based alerting, making it an ideal choice for final-year computer science, electronics, or IoT students.

Objectives:

• To design an IoT-enabled home security system that detects intruders in real time.

• To alert the homeowner instantly through mobile notifications, SMS, or email.

• To ensure remote monitoring and control of the system from anywhere.

• To provide a cost-effective alternative to traditional CCTV or alarm systems.

Key Features:

1. Motion Detection: Detects any unauthorized movement using PIR (Passive Infrared) sensors.

2. Intruder Image Capture (Optional): Captures intruder images using a camera module and sends them to the user.

3. Real-time Alerts: Sends instant SMS, email, or app notifications when intrusion is detected.

4. Smart Lock Integration (Optional): Automatically locks doors or activates sirens during a breach.

5. IoT Cloud Monitoring: Displays live sensor data and security status on a web or mobile dashboard.

6. 24/7 Monitoring: Operates continuously with low power consumption.

7. Mobile App / Web Dashboard: Allows remote control and monitoring from anywhere.

8. LED & Buzzer Indication: Visual and audible alerts for local warnings.

Tech Stack:

Hardware Components:

• Microcontroller: NodeMCU (ESP8266) / ESP32 / Arduino UNO

• Sensors:

  • PIR Sensor (motion detection)

  • Ultrasonic Sensor (distance monitoring)

  • IR Sensor (optional for door monitoring)

• Camera (optional): ESP32-CAM or USB webcam module

• Buzzer / Alarm: For local alerting

• Wi-Fi Module: Built-in ESP8266/ESP32 for IoT connectivity

• Power Supply: Battery or AC adapter

Software & Tools:

• Frontend: HTML, CSS, Bootstrap, JavaScript

• Backend: Node.js / PHP / Python (Flask or Django)

• Database: Firebase / MySQL / MongoDB

• IoT Platforms: ThingSpeak / Blynk / MQTT / Firebase Realtime Database

• Mobile App (optional): Built using Flutter or React Native

System Workflow:

1. Sensor Activation:
   PIR and ultrasonic sensors continuously monitor the surroundings for movement.

2. Intrusion Detection:
   When movement is detected, the microcontroller processes the data and triggers the alarm system.

3. Alert & Notification:
   The system immediately sends alerts to the user’s mobile app, SMS, or email, indicating a possible intrusion.

4. Optional Image Capture:
   If a camera module is connected, it captures an image or video of the intruder and uploads it to the cloud.

5. User Response:
   The homeowner can remotely check live data, reset alarms, or trigger emergency services through the web/app interface.

Use Case Example:

A homeowner installs the Home Security & Intruder Alert System at the entrance.
When someone moves near the door at night, the PIR sensor detects motion, the buzzer sounds, and the system sends an instant alert (with photo) to the user’s mobile app.
The owner can then take immediate action, such as alerting neighbors or authorities — even when away from home.

Applications:

• Residential Homes: Provides 24/7 intrusion detection.

• Offices & Shops: Monitors unauthorized access after working hours.

• Institutions: Enhances security in schools, labs, and hostels.

• Warehouses & Industries: Protects assets and equipment.

• Smart Home Projects: Integrates easily with other IoT-based systems.