TypeScript Version

[cjimenezsaiz]

Hello @thomas-v2,

I hope this message finds you well.

Firstly, thank you very much for your excellent work on the .Net driver for SIMATIC PLCs (S7CommPlusDriver). It’s truly impressive and has significantly contributed to our community.

I have developed a fully functional driver from scratch in TypeScript specifically for the SIMATIC S7-300/400 series. Now, I am looking to expand this driver to support the newer SIMATIC series PLCs.

Rather than starting from scratch and duplicating effort in protocol analysis, I am reaching out to kindly request your support and guidance. Specifically, I am seeking your insights into the S7 communication protocol that you've already extensively researched.

What I propose is:

• You provide guidance on the S7Comm protocol details and key insights based on your existing research and implementation.
• Using your guidance, I will develop and publish a fully open-source TypeScript driver on GitHub, clearly crediting your foundational research and contributions.
• The resulting codebase will remain open-source, helping others who might prefer or need a JavaScript/TypeScript implementation.
• I believe this collaborative approach can benefit the community greatly, promoting cross-platform access to Siemens PLCs.

Looking forward to your feedback, and thank you once again for your fantastic contribution!

Best regards,

[thomas-v2]

Hi Carlos,
a JS/Typescript version would be nice to use in NodeRed for example. My idea was to do a implementation in Rust to get a library with a C-Api, which I think can be used in almost all other languages with some glue code. Compared to the S7-300/400 protocol which can be done in 100 lines in the smalles variant, the new protocol needs more effort to do a native implementation in every language.

But you can use my code as inspiration, and if you have any questions, feel free to ask me.

[cjimenezsaiz]

Hi Thommas, I have the most of the code implemented, based in the previous versions of S7+ without the encription. Could you resume how this encription works?

[thomas-v2]

The payload of the Iso-On-TCP layer is encrypted with standard TLSv1.3, after an initial connection setup without encryption.