// Include necessary libraries
#include <Arduino.h>

// Define pins
#define PIR_SENSOR_PIN 14    // GPIO pin for the PIR motion sensor
#define SMOKE_SENSOR_PIN 34  // GPIO pin for the smoke sensor (analog)
#define LIGHT_SENSOR_PIN 35  // GPIO pin for the light sensor (analog)
#define LED_PIN 2            // GPIO pin for the LED

void setup() {
  // Initialize serial communication
  Serial.begin(115200);

  // Set up pin modes
  pinMode(PIR_SENSOR_PIN, INPUT);
  pinMode(SMOKE_SENSOR_PIN, INPUT);
  pinMode(LIGHT_SENSOR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);

  // Initial LED state
  digitalWrite(LED_PIN, LOW);

  Serial.println("Smart Home System Initialized");
}

void loop() {
  // Read the PIR motion sensor state
  int motionDetected = digitalRead(PIR_SENSOR_PIN);
  
  // Read the smoke sensor value (analog)
  int smokeLevel = analogRead(SMOKE_SENSOR_PIN);

  // Read the light sensor value (analog)
  int lightLevel = analogRead(LIGHT_SENSOR_PIN);

  // Print sensor values to the Serial Monitor
  Serial.print("Motion Detected: ");
  Serial.println(motionDetected);
  Serial.print("Smoke Level: ");
  Serial.println(smokeLevel);
  Serial.print("Light Level: ");
  Serial.println(lightLevel);

  // Motion sensor logic
  if (motionDetected == HIGH) {
    Serial.println("Motion detected! Turning on LED.");
    digitalWrite(LED_PIN, HIGH);
    delay(1000); // Keep LED on for 1 second
  } else {
    digitalWrite(LED_PIN, LOW);
  }

  // Smoke sensor logic (threshold value may vary depending on the sensor)
  if (smokeLevel > 300) { // Example threshold for smoke detection
    Serial.println("Smoke detected! Blinking LED.");
    for (int i = 0; i < 3; i++) { // Blink LED 3 times
      digitalWrite(LED_PIN, HIGH);
      delay(200);
      digitalWrite(LED_PIN, LOW);
      delay(200);
    }
  }

  // Light sensor logic (threshold value may vary depending on the environment)
  if (lightLevel < 500) { // Example threshold for low light detection
    Serial.println("Low light detected! Turning on LED.");
    digitalWrite(LED_PIN, HIGH);
  } else {
    Serial.println("Sufficient light detected. Turning off LED.");
    digitalWrite(LED_PIN, LOW);
  }

  delay(500); // Small delay for sensor stabilization
}