noble/lib/mac/uuid-to-address.js

A Node.js BLE (Bluetooth Low Energy) central library.

var bplist = require('bplist-parser');

module.exports = function(uuid, callback) {
  bplist.parseFile('/Library/Preferences/com.apple.Bluetooth.plist', function (err, obj) {
    if (err) {
      return callback(err);
    } else if (obj[0].CoreBluetoothCache === undefined) {
      return callback(new Error('Empty CoreBluetoothCache entry!'));
    }

    uuid = uuid.toUpperCase();

    var formattedUuid = uuid.substring(0, 8) + '-' +
                        uuid.substring(8, 12) + '-' +
                        uuid.substring(12, 16) + '-' +
                        uuid.substring(16, 20) + '-' +
                        uuid.substring(20);

    var coreBluetoothCacheEntry = obj[0].CoreBluetoothCache[formattedUuid];
    var address = coreBluetoothCacheEntry ? coreBluetoothCacheEntry.DeviceAddress.replace(/-/g, ':') : undefined;

    callback(null, address);
  });
};