packet_test.js

var packet = require('packet');
var parser = packet.createParser();

// header=0xaa
// dst=0x1122
// src=0x3344
// len=0x02
// data = [0x0A,0x0B]
var def = "b8 => header, b16 => dst, b16 => src, b8/b8 => data, b8 => crc";

var data = new Buffer([0xAA,0x11,0x22,0x33,0x44,0x02,0x0A,0x0B,0xCC]);
var obj = { header: 170, dst: 4386, src: 13124, data: [ 10, 11 ], crc: 204 };


// parsing
parser.extract(def, function (record) {
  console.log(record);
});

parser.parse(data);


// serializing
var serializer = packet.createSerializer();
var buffer = new Buffer(data.length); // output buffer len is the same as the orginal

serializer.serialize(def, obj);
serializer.write(buffer);

console.log(buffer)