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

#define dht_pin 2
#define dht_type DHT22

DHT dht(dht_pin, dht_type);
LiquidCrystal_I2C lcd(0x27, 16, 2);

int led1 = 4;
int led2 = 5;
int led3 = 6;
int buzer = 7;

void setup() {
  Serial.begin(9600);
  dht.begin();
  lcd.init();
  lcd.backlight();
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
}

void loop() {
  delay(2000);
  float humidity = dht.readHumidity();
  float tempC = dht.readTemperature();
    if(tempC > 60 && humidity > 80) {
    // Highest severity
    digitalWrite(led3, HIGH);
    tone(buzer, 1000);
    digitalWrite(led2, LOW);
    digitalWrite(led1, LOW);
  }
  else if(tempC > 40 && humidity > 60) {
    
    digitalWrite(led2, HIGH);
    noTone(buzer);
    digitalWrite(led3, LOW);
    digitalWrite(led1, LOW);
  }
  else if(tempC > 20 && humidity > 40) {

    digitalWrite(led1, HIGH);
    noTone(buzer);
    digitalWrite(led2, LOW);
    digitalWrite(led3, LOW);
  }
  
  lcd.setCursor(0, 0);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  
  lcd.setCursor(0, 1);
  lcd.print("tempc: ");
  lcd.print(tempC);

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print(" ");
  Serial.print("tempc: ");
  Serial.print(tempC);
  Serial.println();
}