#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT11
#define BUZZER 9

// Connect LEDs to these pins
#define COLD_LED 10
#define NORMAL_LED 11
#define HOT_LED 8

// SDA a4 SCL A5
LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(DHTPIN, DHTTYPE);

void setup()
{
  Serial.begin(9600);
  dht.begin();
  lcd.init(); 
  lcd.backlight();
  pinMode(BUZZER, OUTPUT);
  
  // Set LED pins to OUTPUT mode
  pinMode(COLD_LED, OUTPUT);
  pinMode(NORMAL_LED, OUTPUT);
  pinMode(HOT_LED, OUTPUT);
}

void loop()
{
  delay(500);

  float humi  = dht.readHumidity();
  float tempC = dht.readTemperature();

  lcd.clear();
  if (isnan(humi) || isnan(tempC)) {
    lcd.setCursor(0, 0);
    lcd.print("Failed");
  } else {
    lcd.setCursor(0, 0);
    lcd.print("Temp: ");
    lcd.print(tempC); 
    lcd.print((char)223);
    lcd.print("C");

    lcd.setCursor(0, 1);
    lcd.print("Humi: ");
    lcd.print(humi); 
    lcd.print("%");

    Serial.print("Temp: ");
    Serial.println(tempC);
    Serial.print("Humi: ");
    Serial.println(humi);
  
    // Turn off all LEDs before setting the correct one
    digitalWrite(COLD_LED, LOW);
    digitalWrite(NORMAL_LED, LOW);
    digitalWrite(HOT_LED, LOW);

    if (tempC <= 28) {
      digitalWrite(COLD_LED, HIGH);
    } else if (tempC >=30) {
      digitalWrite(HOT_LED, HIGH);
    } else {
      digitalWrite(NORMAL_LED, HIGH);
    }

    if (tempC <= 25) {
      digitalWrite(BUZZER, HIGH);
      delay(1000);
      digitalWrite(BUZZER, LOW);
    }
  }
}

  // put your setup code here, to run once: