Pymodbus v3.14.0

Bug fixes and 3rd party libs (used only for development) are upgraded.

The function generate_ssl() is moved to examples.

• Remove self signed certificate from production. (#2954)
• Correct inequality in validation error message (#2953)
• Fix non-deterministic convert_from_registers (#2951)
• Fix swapped SimDevice in ModbusDeviceContext (#2952)
• Update CI actions and pyproject. (#2938)
• Add ruff format check to ci.yml (#2947)
• Remove 'useless-suppression' pylint (#2949)
• Format test_client.py with ruff (#2948)
• Update clean_workflows CI (node@20 problem). (#2946)
• Ruff format (due to ruff upgrade). (#2945)
• Fix ModbusServerContext initialization with dict devices parameter (#2944)
• Support configured ASCII input delimiter (#2942)
• Fix default no-response behavior for force listen only (#2941)
• Use correct format character for DataType.REGISTERS 'h' -> 'H' (#2940)

pymodbus v3.13.1

Small summer maintenance release:

• Update CI Workflows.
• Fix dropping the next frame after a skipped one (#2934)
• Correct Log repeat. (#2931)
• Fix address bounds check in get_reg_block (#2926)
• Fix reg_count calc (#2924)
• guard short frames and validate mbap in TLS framer (#2921)
• Use latest uv in CI. (#2922)
• Change MIN_SIZE in ascii frame. (#2920)
• Harden ASCII framer. (#2918)

pymodbus v3.13.0

• Correct missing types. (#2914)
• Altherma heat pump control, with Home Assistant and updating server. (#2907)
• SimDevice, use_bit_address allows different addressing for BITS. (#2908)
• Remove 3.5char frame time check. (#2912)
• Fixed Modbus*Context. (#2910)
• Fix bug in ModbusDeviceContext. (#2909)
• Fix log level in examples (#2902)
• Fix CSS lookup for simulator server (#2904)
• Fix usage docs in examples: add missing option --baudrate (#2903)
• Doc:Finalice server/simulator narrative (#2896)
• Fix codespell bug. (#2900)
• Datastores uses SimData/SimDevice. (#2897)
• Doc on how to convert to SimData/SimDevice. (#2899)
• Fix Read Fifo Query RTU Frame Size (#2898)
• Update server documentation (datstore). (#2895)
• Update server examples to use SimData/SimDevice. (#2893)
• Add server.async_get/setValues. (#2889)
• Solve codeql caching problem. (#2890)
• Remove unused methods in datastore. (#2888)
• Remove datastore get/setValues (async_get/set exist) (#2886)
• Revert "Combine ModbusSparseDataBlock with ModbusSequentialDataBlock."
• Combine ModbusSparseDataBlock with ModbusSequentialDataBlock.
• Remove RemoteDeviceContext datastore. (#2885)

v3.12.1

Minor bug fixes.

• SimDevice / SimRuntime fixes. (#2871)
• No inter_frame_time check for baudrate > 38000. (#2882)
• Fix smaller bugs in test, part 2. (#2880)
• simulator startup armoring and update 3.x docs (#2877)
• Fix smaller bugs in test, part 1. (#2879)
• Update README.rst. (#2878)
• Coverage limit is 99.95% (to allow a little margin).
• Removed simulator README, due to unused.
• fix: add warning log when using internal default simulator config (#2874)
• Document simulator entrypoint in README (#2873)

pymodbus v3.12.0

This release contains a lot of smaller (but still important) bug fixes, and 2 big new items:

• SimData/SimDevice are not released and integrated. This is a modern way of defining data storage for the server.
  The old datastore classes will disappear in v4.0.0 or a bit later.
• All internal import paths are now relative.
  This allows pymodbus to be added as a subproject to your repo with your a name of your choosing, and thus making
  your project independent of which pymodbus version other shared projects use (think e.g. HomeAssistant).

We are also please to welcome 4 new contributors, who we hope will contribute more. A big thanks to all that have helped
make this release happen.

Please remember this is an Y type release (in our X.Y.Z scheme) so please remember to check API_CHANGES.RST to see if
your project needs to make small changes.

Detailed changes:

• Upgrade library versions installed by pip. (#2868)
• SimData/Device integrate in server. (#2866)
• Add bind to ModbusUdpClient. (#2867)
• Solve Zuban problem. (#2864)
• Fix wrong parameter name in function docstring. Fix set_values does not accept tuple. (#2858)
• Add context.async_get/setValues with device_id. (#2863)
• SimData/SimDevice ready for server integration. (#2857)
• Reactivate pytest coverage. (#2862)
• No blank issue template.
• Update issue templates
• Fix ReadFifoQueueResponse count (#2861)
• Limited support for multiple devices on RS485. (#2846)
• Simulator DataBlock docstring corrections (#2853)
• fix README.rst and troubleshooting (#2851)
• Solve DoS vulnerability. (#2852)
• server handle_local_echo only in comm_params. (#2847)
• di is for discrete input (#2842)
• Allow any dev_id, when requesting dev_id 0. (#2845)
• Allow response transaction_id 0. (#2844)
• Use relative import. (#2836)
• ModbusServerContext.device_ids() docstring (#2835)
• Include ModbusSequentialDataBlock into the documentation (#2833)
• Fix Modbus TCP protocol ID validation in FramerSocket (#2830)
• Remove idle_time() from sync client, which anyhow was void. (#2828)
• Correct check_ci.sh. (#2829)
• Replace mypy with zuban (#2825)
• Fix monitoring of functions (#2826)
• Improve types (#2824)
• dicts have preserved insertion order since 3.7 (#2823)
• asyncio.iscoroutinefunction() is deprecated (#2822)
• Remove pypi-alias. (#2818)

Pymodbus v3.11.4

Small maintenance release.

Most important change is that there are now full support for python 3.14 and a number of packages (like mypy) have been updated.

Pymodbus v3.11.3

A small maintenance release.

• Coverage 100% (using no cover, when needed). (#2783)
• Create pypi alias for home-assistant. (#2782)
• Bump utilities in pyproject.toml. (#2780)
• Fix pymodbus.simulator. (#2773)

Most important change is it creates an alias in pypi for the library, allowing home-assistant to overcome a version problem.

Pymodbus v3.11.2

• Clarify documentation on reconnect_delay (#2769)
• Solve CI complaints. (#2766)
• Coverage not allowed below 99.5%. (#2765)
• Test coverage global 100%. (#2764)
• Test coverage simulator 100%. (#2763)
• Test coverage server 100%. (#2760)
• Fix python3.14 deprecation. (#2759)
• Test coverage datastore 100%. (#2757)
• Context test failed due to function code overwritten. (#2758)
• Test coverage transaction 100%. (#2756)
• Test coverage pdu 100%. (#2755)
• Framer test 100%. (#2754)
• llow sub_function_code is custom PDU. (#2753)
• Generate pdu table direct. (#2752)
• Clean pdu lookup in simulator. (#2751)
• diag sub_function_code is 2 bytes. (#2750)
• Requesthandler ignore missing devices logging (#2749)
• Simplify pdu lookup. (#2745)
• Missing coma in string representation of ModbusPDU (#2748)
• Correct "install uv". (#2744)
• Suppress aiohttp missing. (#2743)
• Remove garbage bytes in serial comm. (#2741)
• Test now included python 3.14.
• Stricter types with pyright (#2731)

Remark: in the test coverage commits are a change of the ExceptionResponse PDU, which could cause problems on v3.11.1.

Pymodbus v3.11.1

• Auto debug in case of an error. (#2738)
• Remove duplicate log lines. (#2736)
• Remove unused callback in ServerRequestHandler (#2737)
• test on Python 3.14 (#2735)
• Validate address in all datastores. (#2733)
• Use asyncio.Event to deterministically ensure simulator start (#2734)
• Ignore lockfile (#2730)
• Link api_changes/changelog to README.
• Add note about semver.org.
• Datastore, add typing to set/get. (#2729)
• Move exception codes to constants. (#2728)
• Move ExceptionResponse to proper file. (#2727)
• make base frame signature match subclasses (#2726)
• Switch from venv+pip to uv (#2723)
• Cleanup CI configuration (#2724)
• Simplify code flow for broadcast requests (#2720)
• Fix serial_forwarder.py from examples/contrib (#2715)
• Remove discord. (#2714)

Pymodbus v3.11.0

v3.11.0 is actually a bug fix to v3.10.0, but since the fix causes an API change it was not possible otherwise make v3.10.1

• Correct bit handling (each byte is LSB->MSB). (#2707)
• read_input_registers docstring change count to regs (#2704)
• Add dev_id/tid check in clients (#2711)