Communication between C# windows form application and DI-808

Communication between C# windows form application and DI-808

Hello

I currently writing a c# program to collect data from DI-808.
I have a document about the Web API but I can't connect to DI-808 successfully.
Should the connection address be "ws:\\169.254.67.83" (the default IP address)?
Sorry that I am new to WebSocket, please advice, thank you very much!