root@beaglebone:/var/lib/cloud9# node bonescript/eeprom.js
{ main:
   { header: 'qlUz7g==',
     boardName: 'A335BONE',
     version: '00A3',
     serialNumber: '4211BB000012',
     configOption: 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=' } }


var fs = require('fs');
var buffer = require('buffer');
var util = require('util');

var readEeproms = function() {
    var data = {};
    data.main = parseMainEeprom(fetchEepromData('1-0050'));
    return(data);
};

var fetchEepromData = function(address) {
    var eepromData = new buffer.Buffer(60);
    try {
        var eepromFile =
            fs.openSync(
                '/sys/bus/i2c/drivers/at24/'+address+'/eeprom',
                'r'
            );
        fs.readSync(eepromFile, eepromData, 0, 60, 0);
    } catch(ex) {
        console.warn('Unable to open EEPROM at '+address+': '+ex);
    }
    return(eepromData);
};

var parseMainEeprom = function(eepromData) {
    var data = {};
    data.header = eepromData.toString('base64', 0, 4);
    if(data.header != 'qlUz7g==') {
        console.error('Unknown EEPROM format');
        return(null);
    }
    data.boardName = eepromData.toString('ascii', 4, 12);
    data.version = eepromData.toString('ascii', 12, 16);
    data.serialNumber = eepromData.toString('ascii', 16, 28);
    data.configOption = eepromData.toString('base64', 28, 60);
    return(data);
};

var parseCapeEeprom = function(eepromData) {
    data.header = eepromData.toString('base64', 0, 4);
    if(data.header != 'qlUz7g==')
        throw('Unknown EEPROM format');
    data.boardName = eepromData.toString('ascii', 4, 12);
    data.version = eepromData.toString('ascii', 12, 16);
    data.serialNumber = eepromData.toString('ascii', 16, 28);
    data.configOption = eepromData.toString('base64', 28, 60);
    return(data);
};

console.log(readEeproms());