MPC HMI and OPCUA interface

[caxelrud]

Hi,
I created a simple Julia solution to connect this MPC to OPCUA and for a MPC HMI (using Pluto).
The code is attached.
Let me know if these are topics that you would like to include and develop here in this work.
Pluto_MPC_2025_1.zip

[franckgaga]

Yes, a really cool project of @martinkosch!

It would be really nice to be the first conditional loading of code (Extensions) of ModelPredictiveControl.jl. The weak dep would be Open62541.jl, with loading of a new public small API to interface with Open62541.

Any ideas/thoughts on that topic @baggepinnen ?

[franckgaga]

and HMIs in Pluto is certainly a nice idea to explore @fonsp 😄

[baggepinnen]

I think it would almost certainly be better to keep this in a separate package rather than in a package extension here. The benefits of doing so are several

• They can be versioned separately, in particular, if the extension needs to make a breaking change that will not affect MPC.jl in any way at all.
• If the interest in maintaining the extension is suddenly lost, no harm done to the main MPC.jl. This happens frequently in the ecosystem despite maintainers best intentions, life takes a different path.
• CI of the main package is not slowed down by additionally testing these features, instead, they are only tested when a change in the separate package is made.

[franckgaga]

Hi, I created a simple Julia solution to connect this MPC to OPCUA and for a MPC HMI (using Pluto). The code is attached. Let me know if these are topics that you would like to include and develop here in this work. Pluto_MPC_2025_1.zip

@caxelrud do you have a projet environnement for Example_2025_1.jl (the Project.toml and the Manifest.toml files)?

[caxelrud]

The following lines need to be commented out as:

#include("KEP_HTTPLib_1.jl")
#using .KEP_HTTP_Module

[caxelrud]

I am using the default environment. These are the files:
Project.zip

[caxelrud]

Hi,
Also testing OPCUA to MPC communication using Telegraf. More info at:
https://github.com/influxdata/telegraf/blob/master/plugins/inputs/opcua/README.md
I will send more info asap.

[caxelrud]

I did some HMI development using Pluto including the OPCUA Server and a linear MPC model, tuning and parameters. The information is saved to file. I am combining the previous MPC trends views (previous post here) with these new development. The OPCUA server is now a separated process. Check the attached files.
MPC_HMI_2.zip
Pluto_MPC_2025_2A.pdf
Pluto_MPC_2025_2B.pdf

[franckgaga]

Super interesting work @caxelrud, will try to look on it soon! I'm working on new collocation methods right now.