Modernize NHS serial communication and add configurable port settings

[Challado]

Summary

• Modernize the NHS serial communication implementation.
• Add validated configuration for baud rate, data bits, parity, stop bits and flow control.
• Add configurable serial read timeout and transmission pacing.
• Preserve the driver's existing conditional compilation directives.
• Improve resource handling, reconnection behavior and explanatory comments.
• Bump the driver version from 0.04 to 0.05.

Related to #3510.

Testing

• Successfully compiled the nhs_ser driver on Linux.
• Runtime communication with UPS hardware has not yet been tested.

[github-actions]

A ZIP file with standard source tarball and another tarball with pre-built docs for commit 4640bfc is temporarily available: NUT-tarballs-PR-3543.zip.

[AppVeyorBot]

✅ Build nut 2.8.5.4978-master completed (commit caaf06ed63 by @)

• artifacts
• A 7-zip archive with built NUT for Windows debug binaries is temporarily available: NUT-for-Windows-x86_64-SNAPSHOT-2.8.5.4978-master.7z

[jimklimov]

Thanks, looks great! Might be a worthwile pattern to address #2748 eventually :)

One bit that seems missing is an entry in NEWS.adoc and updates to the driver man page, please.

[Challado]

Added the requested documentation updates in commit 4640bfc:

• Added a NEWS.adoc entry covering the nhs_ser serial communication changes.
• Updated the nhs_ser man page with the supported baud-rate behavior and the new data bits, parity, stop bits, flow control, per-byte read timeout, and transmission pacing options.

Thanks!

[Challado]

Sorry Jim, my mistake. Added and commited now. Em sex., 24 de jul. de 2026 às 12:03, Jim Klimov ***@***.***> escreveu:

…

*jimklimov* left a comment (networkupstools/nut#3543) <#3543 (comment)> Thanks, looks great! Might be a worthwile pattern to address #2748 <#2748> eventually :) One bit that seems missing is an entry in NEWS.adoc and updates to the driver man page, please. — Reply to this email directly, view it on GitHub <#3543?email_source=notifications&email_token=AFQ3CAZIIMXZKVZES2UXOLT5GN3EDA5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTKMBXGEZDSMZRG4Z2M4TFMFZW63VGMF2XI2DPOKSWK5TFNZ2KYZTPN52GK4S7MNWGSY3L#issuecomment-5071293173>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AFQ3CA3R3DZIQJ2XGBNQKA35GN3EDAVCNFSNUABDKJSXA33TNF2G64TZHM4DCMRZGI2TOO2JONZXKZJ3GQ4TMMZSGI3TQMRVUF3AE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[AppVeyorBot]

✅ Build nut 2.8.5.4982-master completed (commit 88ff3670c3 by @)

• artifacts
• A 7-zip archive with built NUT for Windows debug binaries is temporarily available: NUT-for-Windows-x86_64-SNAPSHOT-2.8.5.4982-master.7z