arduino-controller

var Arduino = function () {

   var self = this;
   // constans block
   self.LISTENING_MESSGAE = "LISTENING";
   self.STOP_GAME_MESSAGE = "STOP";
   ...

   var portIsReady = true;
  
   // init SerialPort
   var serialPort = new SerialPort(self.PORT_NUMBER, {
       parser: serialport.parsers.readline("\r\n"),
       baudrate: 9600,
       dataBits: 8,
       parity: 'none',
       stopBits: 1,
       flowControl: false
   }, true);
   // open connection and listening port
   serialPort.on(self.PORT_OPEN_COMMAND, function () {
       serialPort.on(self.PORT_RECEIVE_DATA_COMMAND, function (arduinoMessage) {
           if (arduinoMessage === self.LISTENING_MESSGAE) { // arduino is ready
               self.emit(self.ARDUINO_READY_COMMAND, arduinoMessage);
           } else if (arduinoMessage === self.STOP_GAME_MESSAGE) { // stop command or timeout stop
               self.emit(self.ARDUINO_IS_STOPPED, arduinoMessage);
           } else if (arduinoMessage === self.GOAL_WHITE_MESSAGE || arduinoMessage === self.GOAL_BLUE_MESSAGE) { // goal in white gate (point for blue team)
               self.emit(self.ARDUINO_GOAL, arduinoMessage);
           }
       });
   });

   serialPort.on(self.PORT_CLOSE_COMMAND, function () {
       portIsReady = false;
   });
   serialPort.on(self.PORT_ERROR_COMMAND, function () {
       portIsReady = false;
   });
   self.on(self.ARDUINO_READY_COMMAND, function () {
       portIsReady = true;
   });
   self.on(self.ARDUINO_START_COMMAND, function () {
       if (portIsReady) {
           serialPort.write(self.START_GAME_COMMAND);
       }
   });
   self.on(self.ARDUINO_STOP_COMMAND, function () {
       if (portIsReady) {
           serialPort.write(self.STOP_GAME_COMMAND);
       }
   });
   self.start = function () {
       self.emit(self.ARDUINO_START_COMMAND);
   };

   self.stop = function () {
       self.emit(self.ARDUINO_STOP_COMMAND);
   };
};