private async void ImageUpdateTimerCallback(object? state)
{
   DateTime requestAtUtc = DateTime.UtcNow;

   // Just incase - stop code being called while photo or prediction already in progress
   if (_ImageProcessing)
   {
      return;
   }
   _ImageProcessing = true;

   try
   {
      _logger.LogDebug("Camera request start");

      DetectionResult result;

      using (Stream cameraStream = await _httpClient.GetStreamAsync(_applicationSettings.CameraUrl))
      {
         result = await _predictor.DetectAsync(cameraStream);
      }

      _logger.LogInformation("Speed Preprocess:{Preprocess} Postprocess:{Postprocess}", result.Speed.Preprocess, result.Speed.Postprocess);

      if (_logger.IsEnabled(LogLevel.Debug))
      {
         _logger.LogDebug("Detection results");

         foreach (var box in result.Boxes)
         {
            _logger.LogDebug(" Class {box.Class} {Confidence:f1}% X:{box.Bounds.X} Y:{box.Bounds.Y} Width:{box.Bounds.Width} Height:{box.Bounds.Height}", box.Class, box.Confidence * 100.0, box.Bounds.X, box.Bounds.Y, box.Bounds.Width, box.Bounds.Height);
         }
      }

      var message = new MQTT5PublishMessage
      {
         Topic = string.Format(_applicationSettings.PublishTopic, _applicationSettings.UserName),
         Payload = Encoding.ASCII.GetBytes(JsonSerializer.Serialize(new
         {
            result.Boxes,
         })),
         QoS = _applicationSettings.PublishQualityOfService,
      };

      _logger.LogDebug("HiveMQ.Publish start");

      var resultPublish = await _mqttclient.PublishAsync(message);

      _logger.LogDebug("HiveMQ.Publish done");
   }
   catch (Exception ex)
   {
      _logger.LogError(ex, "Camera image download, processing, or telemetry failed");
   }
   finally
   {
      _ImageProcessing = false;
   }

   TimeSpan duration = DateTime.UtcNow - requestAtUtc;

   _logger.LogDebug("Camera Image download, processing and telemetry done {TotalSeconds:f2} sec", duration.TotalSeconds);
}