CoAP Observe Option

[SachinEdwin]

Hi,

I was able to register my CoAP sensor resource successfully and I get this notification every 30 secs, now I want to display this notification on a windows application, so for every change in state of the resource I want my display field to be updated. How do I handle this ? I see the notifications on wireshark, my windows application should get these notifications. How do I approach this ?

Edwin

[longshine]

Hi~

This depends on how you register your observer.

With a Request object marked with Request.MarkObserve(), a Request.Respond event will be fired every time a notification is arrived. You can add a handler to that event to get the notification and update your window. For instance:

// create a new request
Request request;

// mark as observer
request.MarkObserve();

// add event handler
request.Respond += delegate(Object sender, ResponseEventArgs e)
{
    // this is a new notification
    Response response = e.Response;
    // TODO update window state here
    // you may need to switch to the UI thread first
};

// finally issue the request
request.Send();