   } else if (state == UNLOCKED) {
     lcd.print("Space is open   ");
     lcd.setCursor(0, 1);
-    lcd.print("Press 0# to lock");
+    lcd.print("Press 0P to lock");
   }
 }
 

String serial_buffer = "";
String serial_unfinished_line = "";
String buffer = "";

void updateDisplay() {
  lcd.clear();

      setState(LOCKED);
    }
  } else if (state == UNLOCKED) {
    if ( checkE() ) {
      callRing();
    }
    
    char key = keypad.getKey();
    
    if (key) {
      if (key == 'P' || key == 'E') {
        if (buffer == "0") {
          Serial.println("LOCK;");
          setState(LOCKED);
