Can't connect asynchronously to opcua server

I’m trying to get a value of a node in my OPCUA server.

I’m using asyncua on a windows 10 x64 computer.
The server is on a PLC.

When I write this in a normal task it works

client = Client("opc.tcp://192.168.1.88:4840")
# client.max_chunkcount = 5000 # in case of refused connection by the server
# client.max_messagesize = 16777216 # in case of refused connection by the server
client.connect()

But when I use the basic example using an async function with the await the line,

await client.connect()

Returns a timeoutError with asyncio.exceptions.CancelledError but nothing else to explain why it doesn’t work.

I would’ve kept trying without the the await but when I try to get my value with client.nodes.root.get_child([...]) the returned value prints <coroutine object Node.get_child at 0x000002C38EE45E40> (when it should be a simple integer or boolean) and I don’t know what to do with that so I guess I should keep going with the examples.

Do you have any idea why await client.connect() return this exception ?

I also tried with 2 different (and built under different langages) opcua clients just to be sure it wasn’t the server that was broken. And the clients can connect properly.

---

EDIT: in case that helps, the console gives :

disconnect_socket was called but connection is closed
close_session was called but connection is closed
close_secure_channel was called but connection is closed
disconnect_socket was called but connection is closed
Traceback (most recent call last):
  File "Python311Libasynciotasks.py", line 490, in wait_for
    return fut.result()
           ^^^^^^^^^^^^
asyncio.exceptions.CancelledError

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "OPCgpt.py", line 28, in <module>
    loop.run_until_complete(connect_to_opc_server())
  File "Python311Libasynciobase_events.py", line 653, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "OPCgpt.py", line 12, in connect_to_opc_server
    await client.connect()
  File "Python311Libsite-packagesasyncuaclientclient.py", line 287, in connect
    await self.open_secure_channel()
  File "Python311Libsite-packagesasyncuaclientclient.py", line 374, in open_secure_channel
    result = await self.uaclient.open_secure_channel(params)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "Python311Libsite-packagesasyncuaclientua_client.py", line 315, in open_secure_channel
    return await self.protocol.open_secure_channel(params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "Python311Libsite-packagesasyncuaclientua_client.py", line 232, in open_secure_channel
    await asyncio.wait_for(self._send_request(request, message_type=ua.MessageType.SecureOpen), self.timeout)
  File "Python311Libasynciotasks.py", line 492, in wait_for
    raise exceptions.TimeoutError() from exc
TimeoutError

---

EDIT 2 : Someone asked me to post my code for people to be able to reproduce it. It’s very simple so the bug is pretty odd. Someone on github mentionned that I may be blocking the eventloop but I didn’t go too far off from freeopcua’s examples..

import asyncio
from asyncua import Client

async def connect_to_opc_server():
    # Créez un client OPC UA
    client = Client(url="opc.tcp://192.168.1.88:4840")
    # client.max_chunkcount = 5000
    # client.max_messagesize = 16777216
    client.name = "Re_Shoes"

    try:
        # Connexion au serveur OPC UA
        await client.connect()

        # Lister tous les nœuds enfants du nœud racine (Object)
        root_node = await client.get_root_node()
        print("root node is: ", root_node)

    finally:
        # Déconnexion du serveur OPC UA
        await client.disconnect()

if __name__ == "__main__":
    loop = asyncio.get_event_loop()
    loop.run_until_complete(connect_to_opc_server())
    loop.close()

This is my main code but I have tried many variations of this.