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

#define ONE_WIRE_BUS 4 // DS18B20 data pin
#define BUZZER_PIN 5    // Buzzer pin
#define BUTTON_PIN 15   // Push button pin

#define TEMP_SETPOINT 25 // Temperature setpoint in Celsius
#define TEMP_THRESHOLD 1 // Temperature deviation threshold in Celsius
#define BUZZER_DURATION 1000 // Duration of buzzer sound in milliseconds

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

bool alarmActive = false;
bool alarmSnoozed = false;
unsigned long snoozeStartTime = 0;
const unsigned long snoozeDuration = 60000; // Snooze duration in milliseconds (1 minute)

void setup() {
  Serial.begin(115200);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  sensors.begin();
  sensors.getAddress(tempSensor, 0);
  sensors.setResolution(tempSensor, 12);
}

void loop() {
  sensors.requestTemperatures();
  float temperature = sensors.getTempC(tempSensor);

  if (temperature != DEVICE_DISCONNECTED_C && !alarmSnoozed) {
    Serial.print("Temperature: ");
    Serial.println(temperature);

    if (temperature > TEMP_SETPOINT + TEMP_THRESHOLD || temperature < TEMP_SETPOINT - TEMP_THRESHOLD) {
      activateAlarm();
    } else {
      deactivateAlarm();
    }
  }

  if (digitalRead(BUTTON_PIN) == LOW) {
    // Snooze button is pressed
    if (!alarmSnoozed) {
      alarmSnoozed = true;
      snoozeStartTime = millis();
      Serial.println("Alarm snoozed.");
    }
  }

  if (alarmSnoozed && millis() - snoozeStartTime >= snoozeDuration) {
    // Snooze duration elapsed, reset alarm snooze
    alarmSnoozed = false;
    Serial.println("Alarm snooze ended.");
  }

  delay(1000); // Delay to avoid excessive looping
}

void activateAlarm() {
  if (!alarmActive) {
    alarmActive = true;
    digitalWrite(BUZZER_PIN, HIGH);
    delay(BUZZER_DURATION);
    digitalWrite(BUZZER_PIN, LOW);
    Serial.println("Alarm activated.");
  }
}

void deactivateAlarm() {
  if (alarmActive) {
    alarmActive = false;
    digitalWrite(BUZZER_PIN, LOW);
    Serial.println("Alarm deactivated.");
  }
}