         if (sModeButton.process())
         {
             sRunningMode = !sRunningMode;
+#if ENABLE_SERIAL
             Serial.print("Running Mode: ");
             Serial.println(sRunningMode ? "manual" : "automatic");
+#endif
             return true;
         }
         delay(sSleepTime);

};

byte sRunningMode = RunningMode::automatic;
byte sCurrentStep = 0;

// -----------------------------------------------------------------------------



// -----------------------------------------------------------------------------
// Hardware Mapping - Arduino Leonardo

#define ENABLE_SERIAL 0

template<int Pin>
class ToggleButton : public Bounce
