#include <LiquidCrystal.h>
#include <DHT.h>
#include <Servo.h>

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
Servo servo1;
Servo servo2;

const int redLed = 3;
const int greenLed = 4;
const int yellowLed = 5;
const int servoPin1 = 6;
const int servoPin2 = 7;

// Define servo positions for different temperature ranges
const int servoLowTempPos = 90; // Adjust as needed
const int servoHighTempPos = 0; // Adjust as needed

void setup() {
  lcd.begin(16, 2);
  lcd.print("Roll No: 2347133");
  delay(2000); // Display roll number for 2 seconds

  lcd.clear();
  dht.begin();

  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(yellowLed, OUTPUT);

  servo1.attach(servoPin1);
  servo2.attach(servoPin2);

  // Initialize servos to a neutral position (optional)
  servo1.write(90);
  servo2.write(90);
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");

  // Display humidity if required (replace with distance if applicable)
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print(" %");

  // LED and servo control based on temperature
  if (temperature < 20) {
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, LOW);
    digitalWrite(yellowLed, LOW);
    servo1.write(servoLowTempPos); // Use defined position
    servo2.write(servoHighTempPos); // Use defined position
  } else if (temperature >= 20 && temperature <= 25) {
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
    digitalWrite(yellowLed, LOW);
    servo1.write(90); // Neutral position
    servo2.write(90); // Neutral position
  } else {
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, LOW);
    digitalWrite(yellowLed, HIGH);
    servo1.write(servoHighTempPos); // Use defined position
    servo2.write(servoLowTempPos); // Use defined position
  }

  delay(2000); // Update every 2 seconds
}