🚦 Office Occupancy-Based Lighting System

An Arduino project that automates room lighting based on real-time occupancy detection using PIR sensors and I2C LCD. Built to simulate smart energy-saving systems.

🛠️ Components Used

• Arduino Uno
• 2 x PIR Sensors (Entry & Exit)
• I2C 16x2 LCD Display
• 1 x LED (Simulates room light)
• 220Ω Resistor
• Jumper wires, Breadboard

🔌 Circuit Overview

Component	Arduino Pin
PIR Entry	D2
PIR Exit	D3
LED	D13 (via 220Ω)
LCD SDA	A4
LCD SCL	A5
LCD VCC	5V
LCD GND	GND

🧠 Logic

• Motion at entry PIR → count++
• Motion at exit PIR → count--
• If count > 0 → LED ON & LCD shows occupancy
• If count = 0 → LED OFF & LCD shows “Room Empty”

💡 Features

• Live room occupancy tracking
• Automated lighting control
• LCD status display
• Energy-efficient simulation

📸 Screenshot

📈 Future Scope

• Add buzzer alerts
• Add LDR for light-based auto mode
• Connect with Wi-Fi module (e.g., ESP8266) for IoT version