code: function isRecognisedBluetoothDevice(name) {
      if (!name) return false;
      var devs = recognisedBluetoothDevices();
      for (var i=0;i<devs.length;i++)
        if (name.substr(0, devs[i].length) == devs[i])
          return true;
      return false;
    }
docs: If we can't find service info, add devices
  based only on their name