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Commits on Apr 17, 2026

• fix(client): narrow socket Optional before use to satisfy mypy

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• style: apply ruff-format to clock-parser diagnostics

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• fix(parser): correct GET_CLK byte offsets and stop masking errors

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Commits on Mar 27, 2026

• feat: add TCP keepalive and heartbeat_read() for redundant PLC support

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Commits on Mar 13, 2026

• Fix S7-300 connection reset: set max_parallel=1 for PDU 240

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• Promote optimization logs to INFO level for visibility

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• Remove MAX_VARS read limit — optimization pipeline handles any item count

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• Add parallel dispatch, auto-tuned max_parallel, plan caching, and safe block splitting

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• Optimize read_multi_vars with nodeS7-style sort/merge/packetize pipeline

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Commits on Mar 12, 2026

• Fix db_get/db_fill failing on S7-1200 PLCs with incorrect MC7Size (#608)

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Commits on Mar 10, 2026

• Merge master into fix/559-write-area-word-len, resolve conflicts

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• Merge pull request #602 from gijzelaerr/feat/missing-data-type-setters

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• Merge pull request #586 from gijzelaerr/fix/479-set-string-padding

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• Merge pull request #585 from gijzelaerr/fix/553-setter-return-consistency

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Commits on Feb 28, 2026

• Add missing data type setters and fix get_lword/get_wchar bugs

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• Revert async client commits from master

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• Extract shared pure-computation methods into ClientMixin

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• Add missing AsyncClient methods, tests, and fix concurrent sequence bug

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• Revert connection.py changes, move AsyncISOTCPConnection to async_client.py

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• Add native async client with asyncio.Lock for concurrent safety

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• Mark connection as disconnected on TCP errors (#588)

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• Fix get_connected to detect lost network connections (#587)

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Commits on Feb 27, 2026

• Backport robustness improvements from python-s7comm (#580)

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• Fix ruff format: wrap long line in read_area

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• Fix off-by-two padding bug in set_string and empty string edge case

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• Make all setter functions consistently return bytearray

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• Add optional word_len parameter to read_area() and write_area()

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Commits on Feb 26, 2026

• Pure native python snap7 (#569)

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Commits on Dec 29, 2025

• Fix PLC setter functions for memoryview compatibility (#575)

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• Modernize CI/CD: switch to uv, fix Python 3.11+ compatibility (#576)

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Commits on Sep 11, 2025

• Code quality improvements and comprehensive documentation (#568)

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Commits on Jul 3, 2025

• drop Ubuntu 20.04 (#562)

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Commits on Apr 29, 2025

• setters.py -> set_string() -> isascii() (#561)

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Commits on Nov 13, 2024

• Cache `error_text()` instead of `check_error()` (#552)

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Commits on Nov 2, 2024

• fix docs (#544)

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