 const int outPinLed = 2;
 const int inPinTrigger = 7;
+const int inPinDetector = 4;
 
 int triggerPressed = 0;
 

  digitalWrite(outPinLed, LOW);

  pinMode(inPinTrigger, INPUT);

}


  if (triggerPressed != triggerPrev) {
    Serial.print("Trigger state changed: ");
    Serial.println(triggerPressed);
    if (triggerPressed) {
      int detectorValue = digitalRead(inPinDetector);
      
      Serial.print("Detector: ");
      Serial.println(detectorValue);
    }
  }
    
  int ledState = triggerPressed ? HIGH : LOW;
  digitalWrite(outPinLed, ledState);

