🌟 Smart Home Automation with LDR, Temperature Sensor & LCD Display

This project showcases a Smart Home Automation System using an LDR (Light Dependent Resistor), TMP36 Temperature Sensor, and a 16x2 I2C LCD Display to control an LED (automatic night lighting), a fan (temperature-based cooling), and display real-time sensor readings.

🚀 Features

✅ Automatic night light using an LDR
✅ Temperature-based fan control with a TMP36 sensor
✅ Live sensor readings displayed on a 16x2 LCD
✅ Real-time debugging via Serial Monitor
✅ Adjustable threshold values for customization

🔧 Components Used

• LDR (Photoresistor) – Detects ambient light levels
• TMP36 Temperature Sensor – Measures surrounding temperature
• 16x2 I2C LCD Display – Shows live sensor readings
• LED – Turns on when it’s dark
• Fan (Motor) – Activates when temperature crosses a set threshold
• Arduino UNO R3 – Microcontroller to process inputs and control outputs
• Resistors & Wires – For circuit connections
• I2C Module – Enables LCD communication with fewer pins

📜 Code Explanation

• Reads LDR & temperature sensor values using analogRead()
• Maps & processes sensor values for LED & Fan control
• Displays sensor data on LCD using I2C communication
• Uses digitalWrite() to toggle LED & Fan based on thresholds
• Outputs real-time readings via Serial Monitor

🔌 Circuit Connections

Component	Arduino Pin
LDR	A0
TMP36	A1
LED	9
Fan	5
LCD (SDA)	A4
LCD (SCL)	A5

📺 LCD Display Output

The 16x2 LCD screen will display:

Temp: 26.4°C   
Light: 540 LUX  

🎯 How to Use

1. Upload the code to your Arduino
2. Adjust lightThreshold & tempThreshold if needed
3. Open Serial Monitor for debugging
4. Observe the LCD displaying real-time sensor values
5. Watch the LED & Fan operate automatically based on environmental conditions

📸 Simulation

This project was built and tested in TinkerCAD. View or modify the simulation here:
🔗 TinkerCAD Link

📌 Future Improvements

• Add a DHT11 sensor for humidity monitoring
• Integrate IoT connectivity for remote monitoring & control
• Use relay modules for real-world appliance control
• Upgrade LCD to an OLED display for better readability

Made with ❤️ by Hardik Jaiswal
Exploring Embedded Systems & Smart Automation! 🚀