Native python implementation

[gijzelaerr]

implements #545

[lupaulus]

I will try to work on ISO-on-TCP Stack

[gijzelaerr]

this idea is a bit in flux. I've been trying to do a full auto translation with google gemini and github co-pilot with mixed results. I have another branch somewhere that has better results, but i didn't find the time to polish it.

How do you propose to work on the iso-on-tcp stack?

[lupaulus]

I propose to convert Davide's work on the basis of ISO TCP. I also have another ISO TCP integration at my disposal, which is optimised for faster communications (20ms). I used co-pilot too, but it needs cleaning and adaptation with python standards and performance (multiprocess - threadings - socket).

[gijzelaerr]

thats basically what is happening in the branch, the basics should be there. What would be different? why is this alternative implementation faster?

[lupaulus]

I am not sure if it faster than David exchange, but they seem to be a different usage of hardware capabilities (Processor, thread, realtime kernel)

Here my branch, I will continue

I heard that Siemens will release a new CPU for the end of the year. From what I've heard, this will remain an S7.
I'm seeking for documentation about the S7+ protocol, not sure if I can implement it.

[gijzelaerr]

so my original plan was:

• reimplement c++ implementation in python, as we/you now mostly did in this branch. Aim is to make it a drop in replacement with the same/similar API, which can be a bit clunky initially.
• do a bit of testing see if it works with the emulator
• integrate it with the existing code, remove the DLL and reroute all calls that went to the DLL to the new native implementation
• Make sure test suite runs
• cleanup phase, see if we can simplify some calls
• code style and type checks passes everywhere
• done!

what do you think?