   /* go trough all the button and check which one was pressed */
   for ( i = 2; i <= 6; i++ )
     if ( digitalRead( i ) ) *button = i; else continue;
-  Serial.print( "button was pressed, nr " );
-  Serial.println( *button );
+  if ( *button != 0 ) { 
+    Serial.print( "button was pressed, nr " );
+    Serial.println( *button );
+  }
+  
   return SUCCESS;
 }
 

  tx_message.checksum ^= tx_message.source;
  tx_message.checksum ^= tx_message.data;
  /* Send the data packet */
  Mirf.send( &tx_message.destination );
  Mirf.send( &tx_message.source );
  Mirf.send( &tx_message.data );
  Mirf.send( &tx_message.checksum );
  
  /* Wait for data to be transmitted */
  while ( Mirf.isSending() );

  /* when nothing was received */
  if ( !Mirf.dataReady() ) return 1;
  byte b;
  Mirf.getData( (byte *) b );
  /* according to our status we save the received byte and go to next state */
  switch ( rx_stat ) {
    case 0: rx_message.destination = b; rx_stat = 1; break;
