WSS seems not to work. about simple-websocket-server

[eidheim]

Keep in mind that you should not send a message to server before the connection is established. See https://github.com/eidheim/Simple-WebSocket-Server/blob/master/javascript_client_example.html

Also you need to accept the certificate in the browser if it is not accepted by default. One way to do this, since I do not think this can be done through WSS sadly, is to first start https://github.com/eidheim/Simple-Web-Server with the same certificate and accept that one, before running the WSS Javascript.

See if the problem lies here, good luck!

Thanks for the reply.
Im using at the moment your script js client.

The certificate should be accepted since its a StartCom signed certificate. However, i will try the hint with the WebServer.