#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>

const int ledPin = 13;                  
const int buzzerPin = 9;               
const int sensorPin = 2;                

OneWire oneWire(sensorPin);
DallasTemperature sensors(&oneWire);

LiquidCrystal_I2C lcd(0x27, 16, 2);    

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(7, OUTPUT);

  lcd.begin(16, 2);                      
  lcd.print(" PENGUKUR SUHU ");
  lcd.setCursor(2, 3);
  lcd.print(" TUBUH ");

  Serial.begin(9600);
  sensors.begin();
  lcd.backlight();
  delay(2500);
}

void loop() {
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);

  lcd.setCursor(0, 1);
  lcd.print("Suhu: " + String(temperature) + " C");

  Serial.print("Suhu: ");
  Serial.print(temperature);
  Serial.println(" °C");

  if (temperature > 37.5) { 
    lcd.setCursor(0, 0);
    lcd.print("   TINGGI!!!   ");
    
    digitalWrite(ledPin, HIGH);  
    digitalWrite(7, LOW);
    tone(buzzerPin, 1000);  
  } else {
    lcd.setCursor(0, 0);
    lcd.print("  NORMAL       ");
    
    digitalWrite(ledPin, LOW);  
    digitalWrite(7, HIGH);
    noTone(buzzerPin);  
  }

  delay(1000);  
}