Hello,
Did you get any request parameter in the meantime? The frontend can need up to a few hours in order to get return parameters.
I see you are using Web Sockets, we did not test WebSocket with the frontend, there is no guaranty it will work. Please update us on this status.
What do you mean by: " Is there a document which explains how to "request several slaves for the same thing" ?"
Thanks
Cédric LN