#include <DHT.h> // Include DHT library

#define DHTPIN 2       // Define the pin for DHT sensor data (changed to pin 2)
#define DHTTYPE DHT22  // Define the type of DHT sensor you're using

// Define ultrasonic sensor pins
#define TRIGGER_PIN 3
#define ECHO_PIN 4

// Define LDR sensor pin
#define LDR_PIN A0

// Initialize DHT sensor
DHT dht(DHTPIN, DHTTYPE);

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

    // Initialize the DHT sensor
    dht.begin();

    // Set ultrasonic sensor pins as outputs and inputs
    pinMode(TRIGGER_PIN, OUTPUT);
    pinMode(ECHO_PIN, INPUT);
}

void loop()
{
    // Measure distance using ultrasonic sensor
    long duration, distance;
    digitalWrite(TRIGGER_PIN, LOW);
    delayMicroseconds(2);
    digitalWrite(TRIGGER_PIN, HIGH);
    delayMicroseconds(10);
    digitalWrite(TRIGGER_PIN, LOW);
    duration = pulseIn(ECHO_PIN, HIGH);
    distance = (duration / 2) / 29.1; // Calculate distance in centimeters

    // Read LDR sensor
    int ldrValue = analogRead(LDR_PIN);

    // Read temperature and humidity using DHT sensor
    delay(2000); // Increase delay before reading DHT sensor
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();

    // Print sensor readings
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.print(" cm, LDR Value: ");
    Serial.print(ldrValue);
    Serial.print(", Humidity: ");
    Serial.print(humidity);
    Serial.print("%, Temperature: ");
    Serial.print(temperature);
    Serial.println("°C");

    // Wait a short delay between measurements
    delay(1000);
}