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

DHT dht (4, DHT22);
LiquidCrystal_I2C lcd (0x27, 16, 2);
int buzzer=2;
int Redled=5;
int Greenled=18;

float Temperature, Humidity;

void setup(){
  pinMode(buzzer, OUTPUT);
  pinMode(Redled, OUTPUT);
  pinMode(Greenled, OUTPUT);
  dht.begin();
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
}

void loop(){
  Temperature = dht.readTemperature();
  Humidity = dht.readHumidity();

  Serial.print("T: ");
  Serial.println(Temperature);
  Serial.print("H: ");
  Serial.println(Humidity);

  lcd.setCursor(0,0);
  lcd.print("T: ");
  lcd.print(Temperature);
  lcd.print(" C");
  lcd.setCursor(0,1);
  lcd.print("H: ");
  lcd.print(Humidity);
  lcd.print(" %");

if (Temperature > 30 || Humidity >50) {
  digitalWrite(buzzer, HIGH);
  digitalWrite(Redled, HIGH);
  digitalWrite(Greenled, LOW);
} else{
  digitalWrite(buzzer, LOW);
  digitalWrite(Redled, LOW);
  digitalWrite(Greenled, HIGH);
}
  delay(1000);
}