async void DroneClient_NavigationDataAcquired(AR.Drone.Data.Navigation.NavigationData obj)
        {
            if (deviceClient != null)
            {
                if (DateTime.Now.Subtract(last).TotalMilliseconds > 1000)
                {
                    last = DateTime.Now;
                    try
                    {
                        var info = new
                        {
                            DeviceID = deviceId,
                            Battery  = obj.Battery.Percentage,
                            obj.Yaw,
                            obj.Pitch,
                            obj.Roll,
                            obj.Altitude,
                            State     = obj.State.ToString(),
                            Timestamp = DateTime.UtcNow
                        };
                        var infoString = JsonConvert.SerializeObject(info);

                        Message msg = new Message(Encoding.UTF8.GetBytes(infoString));
                        msg.Properties.Add("type", "telemetry");
                        await deviceClient.SendEventAsync(msg).ConfigureAwait(false);
                    }
                    catch (Exception ex)
                    {
                        Logger.LogException(ex);
                    }
                }
            }
        }
 private void DroneClient_NavigationDataAcquired(AR.Drone.Data.Navigation.NavigationData obj)
 {
     Altitude = obj.Altitude;
     Battery  = obj.Battery.Percentage;
 }