FreeOpcUa
OPC UA and Python
Hi all, I have learnt python for machine learning algorithms (basic level - numpy, scipy, matplotlib, regressions, knn, etc.). Now I got assigned to work in OPC UA with python coding in it. I am completely new to python codes for opc ua protocol to initiate communication between server and client. Please can anyone refer some links or tutorials to start with some samples and also how to master the coding. Thanks in advance
one thing to mention is that "opcua-binary" is a protocol, "opcua" is a communication standard which also describe how data is represented
For OPC UA itself I liked the introduction from here. The official Specs are online here. And dealing with OPC UA with our repo see examples, mentioned from Andreas (also they create many "Aaaaahhhhhh"-Effects). If you like async stuff more than sync, you may want to switch to opcua-asyncio.
To connect the server, I am using Unified Automation UA Expert client tool. While connecting the server program(with user authentication -username & password) with UA client tool, I got error as "Bad Certificate Entrusted". Then I checked with server with encryption example from github- python opcua examples( https://github.com/FreeOpcUa/python-opcua/tree/master/examples) which has certificate and private key in the same program. I am able to connect but still I am not getting any data. Please can anybody help me on this?
- What are the basic python functions which need to be in server program for client authentication?
- If any simple documents /tutorials available on this, please refer
Thank you
What does your server want? User/Password or a certificate? I just want to include user authentication code in this server with encryption example from github- python opcua examples( https://github.com/FreeOpcUa/python-opcua/tree/master/examples). I dont understand the user manager examples in github( https://github.com/FreeOpcUa/python-opcua/tree/master/examples).