#include <dht.h>
#include <LiquidCrystal.h>

dht DHT;
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
const int buzzerPin = 10;
const int ledPin = 13;

#define DHT_22 7

void setup() {
  Serial.begin(9600);
  lcd.begin(16, 2);
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
}

void loop() {
  float temperature = DHT.read22(DHT_22);
  Serial.print("Temperature = ");
  Serial.println(DHT.temperature);
  delay(1000);     
 
  if (DHT.temperature < 20) {
    digitalWrite(ledPin, LOW);
    
    lcd.setCursor(0,0);
    lcd.print("Temp: ");
    lcd.print(DHT.temperature);
    delay(1000);
    lcd.print((char)223);
    lcd.print("C");
    
    lcd.setCursor(0,1);
    lcd.print("Status: HEALTHY");

  
    

  } else if (DHT.temperature >= 20 && DHT.temperature <= 25) {
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
    
    lcd.setCursor(0,0); 
    lcd.print("Temp: ");
    lcd.print(DHT.temperature);
    delay(500);
    lcd.print((char)223);
    lcd.print("C");
    
    lcd.setCursor(0,1); 
    lcd.print("Status: STANDBY ");

  
    
  } else  {
    digitalWrite(ledPin, HIGH);
    delay(500);
    digitalWrite(ledPin, LOW);
    delay(500);
    
    tone(buzzerPin, 1000);
    
    lcd.setCursor(0,0); 
    lcd.print("Temp: ");
    lcd.print(DHT.temperature);
    delay(1000);
    lcd.print((char)223);
    lcd.print("C");
    
    lcd.setCursor(0,1); 
    lcd.print("Status: UNHEALTHY ");
  }
}