bool pressed;
uint32_t numberKeyPresses;



void IRAM_ATTR isr() { // interrupt hundler 
	numberKeyPresses++;
  pressed = true; // raise interrupt flag
}

void setup() {
	Serial.begin(115200);
	pinMode(18, INPUT_PULLUP);
	attachInterrupt(18, isr, FALLING);
  pressed=false;
}

void loop() {
	if (pressed) {
		Serial.printf("Button pressed %u times\n", numberKeyPresses);
		pressed = false;
	}
}