// TEST interrupt


#define btn 18
unsigned long now = millis();
long lastPress = 0;
bool startTimer = 0;
void IRAM_ATTR isr()
{
  digitalWrite(2,HIGH);
  startTimer = 1;
  lastPress = millis();
}
void setup()
{
  pinMode(btn,INPUT_PULLUP);
  attachInterrupt(btn,isr,FALLING);
  pinMode(2,OUTPUT);
}
void loop()
{
  now = millis();
  if((startTimer==1) && (now - lastPress > 5000))
  {
    digitalWrite(2,LOW);
    startTimer = 0;
  }
}