OPC UA

Well, yes, there is such a point. It's strange that I need to inform Linuxcnc users. Opc ua is an even more widespread term than linuxcnc . For an overview, you can check out this guy:
www.youtube.com/playlist?list=PLIrJJXPVF...sA9tta8yULOB8nPUO_G7
I haven't even mentioned that there's also Opc UA TSN (FX). I uploaded a new version and fixed the bug with iocontrol.0.user-enable-out.
UPD.Perfect!!! Now the variable write function is working there too.

Overall, work is completed. The server works perfectly. In Prosys, you can build graphs with a frequency of 100ms. UaExpert at a frequency of 50ms. If you create the client yourself, then I think it will work at the speeds of the HAL environment.
You can change variables that aren't available in halmeter.
And those variables that can't be changed - they log that everything is fine, but the variable doesn't actually change. Perhaps in the future, it will be possible to create a tree structure like in halshow. Or add some logs. Anyway, check it out. It might be useful for someone.

Worth a look. We used to run offsite mechatronic hardware hosted by a PLC and an OPC server, that was in NX MCD (Siemens). Also widely used for virtualization and commissioning. That was like a decade+ ago however very much being developed and still in use today.

Reason I'm saying this is, I see endless potential.

I use OPC UA on the job more or less daily. So I know what it is and what it does.
But I don't understand what the point is to have an OPC server with linuxcnc?
What do you do with it? Monitor? Control?

Please don't get me wrong. I find this interesting, but I just don't get the purpose.

The exposure this project bring to lcnc is positive. Purposes are unlimited; resiliency, scalability, data integrity and/or security, etc etc. Perhaps not well adapted for e.g. a home R&D (like mine) however more so in an industrial/scalable setting.

The thing is, I'm developing my own application similar to Codesys and Twincat using the HAL environment. Specifically, this utility is a universal solution that is also suitable for Linuxcnc. With its help, you can monitor the status of a machine (robot) while sitting in the restroom or while moving in the subway. But it also allows you to change the value of variables on the fly, which halmeter does not allow.