Smart Home Security and Monitoring System – Project Description

This project is a Smart Home System that uses multiple sensors and components to provide security, safety, and control. Below is a detailed explanation of how it works:

1. Access Control System

• The system uses a Keypad to enter a password.
• The entered password is displayed on a 16x2 LCD screen (for visual feedback).
• If the password is correct:
• A Servo Motor is activated to open the door.
• A welcome message is displayed on the LCD.
• If the password is incorrect, access is denied and a warning message is shown.

2. Door Control using IR Sensors

• Two Infrared (IR) sensors are used:
• One opens the door when a person is detected.
• The other closes the door automatically when the person leaves.
• These sensors work with the servo motor to control the door's movement.

3. Environmental Monitoring (After Access)

Once the door is open, the system activates multiple sensors to monitor the home environment:

✅ a. Temperature and Humidity Monitoring

• A DHT11 sensor is used to measure temperature and humidity.
• The readings are displayed on the LCD screen.

🔥 b. Fire Detection

• A Flame Sensor (IR-based) detects fire or flame inside the house.
• If fire is detected, a warning is shown on the LCD (and optionally an alarm can be activated).

🧪 c. Gas Detection

• An MQ2 gas sensor is used to detect gas leaks (like LPG or smoke).
• If dangerous gas levels are detected, the system displays a Gas Alert on the LCD.

👁️ d. Light Monitoring

• An LDR (Light Dependent Resistor) is used to monitor the light intensity in the room.

This can be used to automatically turn on lights when it’s dark