Unable to receive data via websockets

[anarayan131]

We, at OFFIS e.V., are currently using VILLAS framework for a GDRTS setup for a German distribution grid operator.

Here, we would like to exchange data via VILLAS node configured as a websocket. The setup is as follows:

1. Remote lab connects as a client to VILLAS node at OFFIS via websocket. Here VILLAS node is configured as a http websocket server.
2. Remote lab sends data to VILLAS node at OFFIS via this connection (Remote lab ==> OFFIS)
3. VILLAS node receives the data and forwards that to a server at OFFIS via another websocket (OFFIS ==> OFFIS). Here VILLAS node is a websocket client.
4. The setpoints are sent back from OFFIS to the remote lab via the same websocket (OFFIS ==> Remote lab).

I am able to achieve step 3, i.e., forward data from VILLAS Node to another server via websocket. I tested this using a modified version of the Lab 12 exercise.
However, I am unable to complete step 2: receive data via the VILLAS WebSocket. I am able to connect to VILLAS node (step 1), but the data sent is not being received at VILLAS.

Could you please help me troubleshoot this?

I have attached the following:

• Conf file for the VILLAS node, which runs on a Hardware at OFFIS (added as text file)
• Test sender sending VILLAS Binary data to the VILLAS Node. This is used to mimic the remote lab.
• Websocket server, which runs on a separate VM at OFFIS. The Villas node should forward the data it receives from the sender to this server.

Thank you for your help.

binary_sender_villas_client_websocket.py
villas_websocket_conf.txt
ws_server.py

[leonardocarreras]

Hi @anarayan131! I just see this, I am afraid that maybe a bit too late, but still wanted to see if it helps you or the next one that see this.
A colleague of mine once told me that we use a very specific setup:
websockets.connect('wss://your_own_url:port', subprotocols=['live']) instead, for example here in your file that you are using the defaults async with websockets.connect(uri) as websocket:
This might be needed in other places of your codebase.