Smart Controller

This project is an Arduino + MIT App Inventor-based smart controller for LED, fan, and alarm control using sensors (LDR, PIR, Thermistor) and Bluetooth communication.

Features

• Automatic Mode: Sensor-based control
  • LED: Turns ON when dark and motion is detected
  • Fan: Turns ON when motion is detected and temperature > 27°C
  • Alarm: Turns ON if temperature > 100°C
• Manual Mode: Control LED/Fan/Alarm from the mobile app
• Live status updates and real-time temperature display

Components Used

• Arduino
• LDR
• PIR Motion Sensor
• Thermistor (LM35)
• 3-Channel Relay Module
• Bluetooth Module (HC-05)
• AC-DC Converter (for power backup)
• Android App (MIT App Inventor)

Files

• Docs – Project summary and Documentation
• Release – Mobile App
• Arduino_Code.ino – Arduino code
• Assets/Screenshots – Screenshot of the mobile app UI
• Assets/AppSource – MIT App Inventor source file ( In case of any modication, Use App Source )

How to Use

1. Construct the circuit by following the steps in the documentation.
2. Upload the Arduino code.
3. Install app present in Release.
4. Connect your Android device to the Bluetooth module.
5. Use the app to control appliances or let sensors take over.