PIR Sensor with a Photon, Particle Cloud, and a UWA

public sealed partial class MainPage : Page
{
    const string PHOTON1DEVICEID = "{YOURDEVICEID}";
    const string ACCESS_TOKEN = "{YOURACCESSTOKEN}";
    SolidColorBrush MotionColor = new SolidColorBrush(Colors.Red);
    SolidColorBrush ClearColor = new SolidColorBrush(Colors.Green);
    public MainPage()
    {
        this.InitializeComponent();
    }
    private async void Open_Stream_Click(object sender, RoutedEventArgs e)
    {
        (sender as Button).IsEnabled = false;
        string url = String.Format("https://api.particle.io/v1/devices/{0}/events/Motion?access_token={1}", PHOTON1DEVICEID, ACCESS_TOKEN);
        WebRequest request = WebRequest.Create(url);
        request.Method = "GET";
        using (WebResponse response = await request.GetResponseAsync())
        {
            using (Stream stream = response.GetResponseStream())
            {
                StreamReader reader = new StreamReader(stream);
                int blankRead = 0;
                while (blankRead <= 5)
                {
                    var str = await reader.ReadLineAsync();
                    if (string.IsNullOrEmpty(str))
                    {
                        ++blankRead;
                        if (blankRead > 1)
                        {
                            await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
                            {
                                streamResultTextBox.Text = "Blank: " + blankRead.ToString();
                            });
                        }
                    }
                    else if (str == "event: Motion")
                    {
                        blankRead = 0;
                        var data = await reader.ReadLineAsync();
                        var jsonData = JsonConvert.DeserializeObject<ParticleEvent>(data.Substring(data.IndexOf("data:") + 5));
                        await this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
                        {
                            streamResultTextBox.Text = jsonData.data > 2048 ? "Motion" : "Clear";// "Data: " + jsonData.data;
                            streamResultTextBox.Foreground = jsonData.data > 2048 ? MotionColor : ClearColor;
                        });
                    }
                }
            }
        }
        (sender as Button).IsEnabled = true;
    }
}
public class ParticleEvent
{
    public int data { get; set; }
    public string ttl { get; set; }
    public string published_at { get; set; }
    public string coreid { get; set; }
}