HAAAAMAMMAMAZA

int chrono=0,basechrono=0;
void setup()
{
  pinMode(2, OUTPUT);
  Serial.begin(9600);
   attachInterrupt(digitalPinToInterrupt(2),temps,FALLING);
 }

void loop()
{
digitalWrite(2, HIGH);
delay(10);
digitalWrite(2, LOW);
delay(1000);
 }
void temps(){
 chrono=millis();
  chrono = (chrono - basechrono);
  basechrono=millis();
  Serial.println(chrono);
}





bool etat;
unsigned int chrono,basechrono;
void setup()
{
  pinMode(9, OUTPUT);
  Serial.begin(9600);
 }

void loop()
{
digitalWrite(9, HIGH);

  etat = digitalRead(9);
  if(etat){
  chrono=millis();
  chrono = (chrono - basechrono);
  basechrono=millis();

  Serial.println(chrono);
  }
delay(10);
digitalWrite(9, LOW);
delay(1000);

 }