node.js to read usb port signals

Question

I have installed serialport module for node.js using npm.(npm install serialport). Now I would like to send some messages from my android phone

Answer 1

Why, yes, it's certainly doable. There's a plenty of examples listed at the serialport package homepage itself.

Your node.js application will start with...

var SerialPort = require("serialport").SerialPort
var serialPort = new SerialPort("/dev/tty-usbserial1");

serialPort.on('data', function(data) { /* processing data */ });

Answer 2

For testing your ports on Windows (you may have to install sf "npm install sf"):

var serialport = require('serialport');
var sf = require('sf');

serialport.list(function (err, results) {
  if (err) {
    throw err;
  }

  for (var i = 0; i < results.length; i++) {
    var item = results[i];
    console.log(sf('{comName,-15} {pnpId,-20} {manufacturer}', item));
  }
});

Output should be something like:

COM8 FTDIBUS\VID_0403+PID_6001+A100DKP7A\0000 FTDI
COM1 ACPI\PNP0501\4&2E24A907&0 (Standardanschlusstypen)

Now use the port your device is connected to, in my case COM8:

var SerialPort = require("serialport").SerialPort
var serialPort = new SerialPort("COM8");

regards