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

#define ONE_WIRE_BUS 2     
#define BUZZER_PIN 3        
#define LED_PIN 4           
#define TEMPERATURE_THRESHOLD 30.0  

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

void setup() {
  Serial.begin(9600);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  sensors.begin();
}

void loop() {
  float temperature = getTemperature();

  Serial.print("Temperature: ");
  Serial.println(temperature);

  if (temperature > TEMPERATURE_THRESHOLD) {
    activateAlarm();
  } else {
    deactivateAlarm();
  }

  delay(1000); 
}

float getTemperature() {
  sensors.requestTemperatures();
  return sensors.getTempCByIndex(0);
}

void activateAlarm() {
  tone(BUZZER_PIN, 1000);  // Play a 1000Hz tone on the buzzer
  digitalWrite(LED_PIN, HIGH);
}

void deactivateAlarm() {
  noTone(BUZZER_PIN);  // Turn off the buzzer
  digitalWrite(LED_PIN, LOW);
}