#define timeSeconds 3

const int led = 26;
const int motionSensor = 27;

// Timer: premenne
unsigned long now = millis();
unsigned long lastTrigger = 0;
boolean startTimer = false;

// funkcia prerusenia – prerusenie aktivovane, LED na HIGH a spustenie casovaca - TIMER
void IRAM_ATTR detectsMovement() {
  Serial.println("MOTION DETECTED!!!");
  digitalWrite(led, HIGH);
  startTimer = true;
  lastTrigger = millis();
}

void setup() {
  Serial.begin(115200);
  pinMode(motionSensor, INPUT_PULLUP); 
  
  attachInterrupt(digitalPinToInterrupt(motionSensor), detectsMovement, RISING);

  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);
}

void loop() {
  now = millis(); //aktualny cas
  // vypnutie LED za cas ulozeny v timeSeconds variable
  if(startTimer && (now - lastTrigger > (timeSeconds*1000))) {
    Serial.println("Motion stopped...");
    digitalWrite(led, LOW);
    startTimer = false;
  }
}