const int recordButtonPin = 8;    // Record button
const int recordLedPin = 13;      // LED for recording

int lastRecordButtonState = HIGH;

// Debounce timestamps
unsigned long lastRecordDebounceTime = 0;
const unsigned long debounceDelay = 250; // 250ms debounce delay

void setup() {
  pinMode(recordButtonPin, INPUT_PULLUP);

  pinMode(recordLedPin, OUTPUT);
  digitalWrite(recordLedPin, LOW);

  Serial.begin(9600);
  Serial.println("Ready");
}

void loop() {
  int currentRecordButtonState = digitalRead(recordButtonPin);

  // --- Record button (pin 8) ---
  if (lastRecordButtonState == HIGH && currentRecordButtonState == LOW) {
    if ((millis() - lastRecordDebounceTime) > debounceDelay) {
      Serial.println("BTN-RECORD");
      lastRecordDebounceTime = millis();
    }
  }
  lastRecordButtonState = currentRecordButtonState;

  // --- Handle incoming LED commands from PC ---
  if (Serial.available() > 0) {
    char c = Serial.read();

    if (c == '1') {              // Recording ON
      digitalWrite(recordLedPin, HIGH);
    } else if (c == '0') {       // Recording OFF
      digitalWrite(recordLedPin, LOW);
    }
  }
}