   
   timeLastPressedLeftButton = currentMillis;
   
-  Serial.println("Left Button Press");
-  
+
+ #ifndef DO_NOT_SHOW_SERIAL_OUT
+   Serial.println("Left Button Press");
+ #endif
+ 
+ 
   switch(currentState)
   {
   case ALARM: stopAlarm();

#include "constants.h"
#include "tune.h"

#define MIN_BATTERY_MILLIVOLT 3300 //You may need to calibrate this
#define MAX_BATTERY_MILLIVOLT 4300 //You may need to calibrate this



void setup(){

  #ifndef DO_NOT_SHOW_SERIAL_OUT
    Serial.begin(9600);
  #endif
  
 //Turn off TX and RX pin
  pinMode(RXLED_PIN, OUTPUT);
