#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>
#include <Servo.h>

#define DHTPIN 2
#define DHTTYPE DHT22

LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);
Servo myServo;

void setup() {
  lcd.init();
  lcd.clear();    
  lcd.backlight();
  dht.begin();
  myServo.attach(9);

  lcd.setCursor(0, 0);
  lcd.print("Temp & Humidity");
  delay(2000);
  lcd.clear();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  if (isnan(temperature) || isnan(humidity)) {
    lcd.setCursor(0, 0);
    lcd.print("Sensor Error!");
    delay(1000);
    return;
  }
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature, 1);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Hum: ");
  lcd.print(humidity, 1);
  lcd.print("%");

  int servoPosition = map(temperature, -40, 80, 0, 180);
  servoPosition = constrain(servoPosition, 0, 180);
  myServo.write(servoPosition);
  delay(1000);
}