/// <summary>
        /// Start full nello offline backend
        /// Including own mqtt broker
        /// </summary>
        /// <returns</returns>
        public async Task StartServiceAsync()
        {
            try
            {
                await _mqttServer.StartServerAsync();

                await _mqttClient.ConnectToBrokerAsync(NELLO_TOPICID);
            }
            catch (Exception ex)
            {
                _logger.LogError("StartServiceAsync error:\n" + ex.ToString());
            }
        }