var SerialPort = require("serialport").SerialPort;
var util = require("util"), repl = require("repl");

SerialPort.list(function (err, ports) {
  ports.forEach(function(port) {
    console.log(port.comName);
    console.log(port.pnpId);
    console.log(port.manufacturer);
  });
});

var serial_port = new SerialPort("/dev/ttyUSB0", {baudrate: 115200});

console.log("Writing '?' to the serial port");
serial_port.write("?\r");

serial_port.on("data", function (data) {
  console.log("here: "+data);
})
serial_port.on("error", function (msg) {
  console.log("error: "+msg);
})

serial_port.close();