         duration=pulseIn(12, HIGH);
         Serial.print(duration/29/2);
         Serial.println("cm");
-        delay(100);
+        delay(250);
       }
       Serial.println();
       break;

 /* NOKO Diagnostics V0.2 31.05.2017 - Nikolai Radke
  *  
  *  Sketch for testing NOKO functions.
  *  This sketch aims to be easy. Clear source code and no libraries.

      amp=!amp;
      break;
    case '3':
      Serial.println(F("Setting AUX (D7) High. Send Space to stop."));
      while(Serial.available()==0) digitalWrite(7,HIGH);
      digitalWrite(7,LOW);
      break;
    case '5':
