public List <SensorDataEntity> GetSensorHistory(string productName, string path, long n)
        {
            var history = _databaseWorker.GetSensorDataHistory(productName, path, n);

            history.Sort((a, b) => a.Time.CompareTo(b.Time));
            if (n != -1 && n > 0)
            {
                history = history.TakeLast((int)n).ToList();
            }

            return(history);
        }