// Home Automation Code

// Pin Definitions
int ledPin = 13;        // Built-in LED
int pirSensorPin = 2;   // PIR Sensor
int tempSensorPin = A0; // Temperature Sensor (Analog Input)
int ldrPin = A1;        // LDR (Light Dependent Resistor)

// Variables
int pirState = LOW;  // No motion detected
int tempValue = 0;   // Placeholder for temperature value
int ldrValue = 0;    // Placeholder for LDR value

void setup() {
  // Initialize serial communication
  Serial.begin(9600);

  // Initialize pins
  pinMode(ledPin, OUTPUT);
  pinMode(pirSensorPin, INPUT);
  pinMode(tempSensorPin, INPUT);
  pinMode(ldrPin, INPUT);

  // Initial messages
  Serial.println("Home Automation System Initialized");
}

void loop() {
  // PIR Sensor
  int motion = digitalRead(pirSensorPin);
  if (motion == HIGH) {
    digitalWrite(ledPin, HIGH);
    if (pirState == LOW) {
      Serial.println("Motion detected: Turning on LED");
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW);
    if (pirState == HIGH) {
      Serial.println("No motion: Turning off LED");
      pirState = LOW;
    }
  }

  // Temperature Sensor
  tempValue = analogRead(tempSensorPin);
  float temperature = (tempValue * 5.0 / 1023.0) * 100; // Convert to Celsius
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" °C");

  // LDR (Light Detection)
  ldrValue = analogRead(ldrPin);
  Serial.print("Light Intensity: ");
  Serial.println(ldrValue);

  // Wait before next iteration
  delay(1000);
}