volatile bool _interrupt = false;

const int buttonPin = 2;  // Pin for the button
volatile bool lastButtonState = HIGH;  // Previous state of the button
volatile unsigned long lastDebounceTime = 0;  // Last time the button state changed
const unsigned long debounceDelay = 50;  // Debounce time (milliseconds)

void setup() {
  Serial.begin(115200);
  Serial.println("test_begin");
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(2), _ISR, FALLING);
}

void loop() {
  Serial.println(_interrupt);
}

void _ISR(){
  _interrupt = true;
  
}