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

#define soundSensor A0
#define relayPin 13
#define servoPin 7
int buzzer = 8;

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo myservo;

int tapThreshold = 100;
unsigned long lastTapTime = 0;
int tapCounter = 0;

void setup() {
  Serial.begin(115200);
  pinMode(relayPin, OUTPUT);
  pinMode(buzzer, OUTPUT);
  lcd.begin(16, 2);
  myservo.attach(servoPin);
}

void loop() {
  int soundLevel = analogRead(soundSensor);
  Serial.println(soundLevel);

  if (abs(soundLevel - 512) > tapThreshold && millis() - lastTapTime > 500) {
    lastTapTime = millis();

   
    tapCounter++;

    
    if (tapCounter == 2) {
      digitalWrite(relayPin, HIGH);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(" UNLOCK WELCOME ");
      buka(); // Membuka servo
      beepBuzzer(3, 1500, 50);  
    } else if (tapCounter == 4) {
      digitalWrite(relayPin, LOW);
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print(" LOCK!!GET-AWAY ");
      tutup(); // Tutup servo
      beepBuzzer(1, 1000, 50);  
      tapCounter = 0;  

    delay(30);  
  }
}
}

void buka() {
  myservo.write(0);
  delay(30);
}

void tutup() {
  myservo.write(90);
  delay(30);
}

void beepBuzzer(int beeps, int frequency, int dutyCycle) {
  for (int i = 0; i < beeps; i++) {
    tone(buzzer, frequency, dutyCycle);
    delay(300);  
    noTone(buzzer);  
    delay(30);  
  }
}