int S1_status;

void setup() {
  Serial.begin(115200);
  pinMode(16, INPUT_PULLUP);
}

void loop() {
  long T1=millis();

  S1_status=digitalRead(16);
  

  long T1_exe=millis()-T1;
  Serial.print("T1exe =  ");
  Serial.println(T1_exe);
  delay(500); // this speeds up the simulation
}