#include <ButtonDebounce.h>
int sw = 12;
int led = 13;
int led_status = 0;
ButtonDebounce button(12,250);
void setup() {
  Serial.begin(9600);
  pinMode(sw, INPUT_PULLUP);
  pinMode(led, OUTPUT);
  button.setCallback(buttonChanged);
}

void loop() {
  button.update();
}

void buttonChanged(int state){
  Serial.println("Changed: "+ String(state));
}