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

#define DHTPIN 25
#define DHTTYPE DHT22

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

int buzzer = 14;

void setup() {
  dht.begin();

  lcd.init();
  lcd.backlight();

  pinMode(buzzer, OUTPUT);
}

void loop() {

  float temp = dht.readTemperature();
  float umid = dht.readHumidity();

  if (isnan(temp) || isnan(umid)) {
    lcd.setCursor(0,0);
    lcd.print("Erro no sensor");
    lcd.setCursor(0,1);
    lcd.print("Verifique DHT");
    noTone(buzzer);
    delay(1000);
    return;
  }

  lcd.setCursor(0,0);
  lcd.print("Temp: ");
  lcd.print(temp);
  lcd.print(" C ");

  lcd.setCursor(0,1);
  lcd.print("Umid: ");
  lcd.print(umid);
  lcd.print(" % ");

  if (temp > 35 && umid < 30) {
    tone(buzzer, 1000);
  }

  else if (temp > 30) {
    tone(buzzer, 1000);
    delay(200);
    noTone(buzzer);
    delay(200);
  }
  else if (umid < 40) {
    tone(buzzer, 1000);
    delay(200);
    noTone(buzzer);
    delay(5000);
  }

  else {
    noTone(buzzer);
  }

  delay(500);
}