// Interrupt-Driven Button - XIAO ESP32-S3
// Using D1 as the interrupt pin

const int BUTTON_PIN = D1;

volatile bool buttonState = false;
volatile unsigned long lastInterrupt = 0;

void IRAM_ATTR handleButton() {
  unsigned long now = millis();
  if (now - lastInterrupt > 50) {  // debounce
    buttonState = !buttonState;
    lastInterrupt = now;
  }
}

void setup() {
  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT_PULLDOWN);

  attachInterrupt(BUTTON_PIN, handleButton, RISING);
}

void loop() {
  if (buttonState) {
    Serial.println("Button Interrupt Triggered");
    buttonState = false;
  }
}