#include <LiquidCrystal_I2C.h>

int freq[] = {30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40}; // 11 elemen
int timeArray[] = {100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000}; // 19 elemen

int buzzer = 25;

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  pinMode(buzzer, OUTPUT);
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Pengusir Tikus");
  lcd.setCursor(0, 1);
  lcd.print("Mode Manual");
  delay(1000);
}

void loop() {
  
    int ranFreqIndex = random(0, sizeof(freq)/sizeof(freq[0]));
    int ranTimeIndex = random(0, sizeof(timeArray)/sizeof(timeArray[0]));

    int ranFreq = freq[ranFreqIndex];
    int ranTime = timeArray[ranTimeIndex];

    tone(buzzer, ranFreq * 1000); // konversi ke Hz
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Output Active");
    lcd.setCursor(0, 1);
    lcd.print("Standby...");

    // ✅ Menampilkan di Serial Monitor saja
    Serial.println("======================");
    Serial.print("Frekuensi (kHz): ");
    Serial.println(ranFreq);
    Serial.print("Delay (ms): ");
    Serial.println(ranTime);
    Serial.println("======================");

    delay(ranTime);
    noTone(buzzer);
  }