crc-itu

Install:

npm install crc-itu

Usage:

var crc16 = require('crc-itu').crc16;

// with string and encoding
var ret = crc16('0d0103588990501766460026', 'hex');
console.log(ret.toString(16)); // 7bf9

// with buffer
var buff = new Buffer('0d0103588990501766460026', 'hex');
var ret = crc16(buff);
console.log(ret.toString(16)); // 7bf9