Python OPCUA server connection Issue

[georgethomas08]

I can connect with Prosys simultaion server with OPCUA client node in Node Red but when I run python OPCUA it's not at all getting connected Why is it so? Python server - python client is working fine!

Please find the python code below

---

from opcua import Server
from random import randint
import datetime
import time

server = Server()

url = "opc.tcp://127.0.0.1:4840"
server.set_endpoint(url)

name = "OPC_SIMULATION_SERVER"
addspace = server.register_namespace(name)

node = server.get_objects_node()

Param = node.add_object(addspace, "Parameters")

Temp = Param.add_variable(addspace, "Temperature", 0)
Press = Param.add_variable(addspace, "Pressure", 0)
Time = Param.add_variable(addspace, "Time", 0)

Temp.set_writable()
Press.set_writable()
Time.set_writable()

server.start()
print("Server started at {}".format(url))

while True:
Temperature = randint(10,50)
Pressure = randint(200, 999)
TIME = datetime.datetime.now()

print(Temperature, Pressure, TIME)

Temp.set_value(Temperature)
Press.set_value(Pressure)

Time.set_value(TIME)

time.sleep(0.1)

---

[Colin]

@georgethomas08

when I run python OPCUA it's not at all getting connected

I am not sure what you are asking. What do you mean by "when I run python OPCUA" and what isn't getting connected to what?

[georgethomas08]

I'm sorry for missing the word "server", there are opcua simulation server in python, I'm not able to connect with opcua-client node in Node-red

[Colin]

I haven't used that node, but I suggest you start by showing us how you have configured the client node and tell us where you are running the server and what OS/hardware node-red is running on. Also post the terminal log that is shown when you start node-red in a terminal. Then probably someone with experience of the node will be able to help.

[georgethomas08]

I installed node-red-contrib-opcua
I will share the working one first, ie: reading from prosys

[Colin]

So that is the working one, I assume. It is the failing one we need.

I note from the screenshot that you appear to be running node-red in Docker. Is that correct? If so I believe that you cannot reference the host via localhost from within the container. I mention that in case that is what you are trying to do.

[georgethomas08]

Hi Colin,

Thanks for the support, Yes the node-red docker only I used, I made it worked I dockerized the python server connect to the same network and its reading now, In addition is there any examples of deploying the docker container in any cloud Kubernetes platform?

[Colin]

@georgethomas08

is there any examples of deploying the docker container in any cloud Kubernetes platform

I don't know about Kubernetes. There have been posts about that previously so I suggest you start by searching the forum. Then if that doesn't help start a new thread with your question.