var SerialPort = require('serialport').SerialPort;
var bindPhysical = require('mqtt-serial').bindPhysical;
var mqtt = require('mqtt');

// might be something like COM1 on windows
var SERIAL_PORT = process.env.SERIAL_PORT || '/dev/tty.usbmodem1421';

var serialPort = new SerialPort(SERIAL_PORT,{
    baudrate: 57600,
    buffersize: 1
});


var client = mqtt.connect('mqtt://some_mqtt_server:1883',
  {username: 'some_username', password: 'some_password'});

bindPhysical({
  serialPort: serialPort,
  client: client,
  transmitTopic: 'some_transmit_topic',
  receiveTopic: 'some_receive_topic'
});