//#include <Arduino.h>

// Pin for the button
const int buttonPin = 2;

// A flag that gets set when the button is pressed
volatile bool buttonPressed = false;

// Callback function (ISR) that is triggered when the button is pressed
void buttonISR() {
  buttonPressed = true;  // Set the flag when the button is pressed
}

void setup() {
  Serial.begin(115200);
  pinMode(buttonPin, INPUT_PULLUP);  // Set button pin as input with pull-up resistor

  // Attach interrupt to button pin: trigger ISR on falling edge (button press)
  attachInterrupt(digitalPinToInterrupt(buttonPin), buttonISR, FALLING);
}

void loop() {
  // Check if the button was pressed (ISR sets the flag)
  if (buttonPressed) {
    delay(50);
    Serial.println("Button was pressed!");
    buttonPressed = false;  // Reset the flag after processing
  }
}