Pymodbus v3.9.2

• Reactivate simulator validate. (#2643)
• Don't bool-test explicit datastores (#2638)
• Test and hard delayed response test. (#2636)
• Update simulator doc. (#2635)
• SimData update
• Officially working towards 4.0.0

Pymodbus v3.9.1

• Correct byte order in bits. (#2631)

pymodbus v3.9.0

• Correct bit handling internally and in API. (#2627)
• default argument ModbusSequentialDataBlock (#2622)
• Fix exception error message for decoding response (#2618)
• Expose exception_code to API. (#2615)
• Simplify ruff config (#2611)
• Documentation dont fixed. (#2605)
• sum() can operate on an Iterator directly (#2610)
• SimData update. (#2601)
• StartServer custom_functions -> custom_pdu.
• Update pyproject.toml to remove python 3.9.
• Remove validate() from datastores. (#2595)
• Python 3.9 is EOL, not supported actively. (#2596)
• correct handle_local_echo for sync client. (#2593)
• devcontainer, automatic install. (#2583)
• Don't set_result on completed futures. (#2582)
• Flush recv_buffer before each transaction write. (#2581)
• Add missing trace. (#2578)
• Update github actions. (#2579)

Remark #2627 is a very important commit, because e.g. read_coils returned the coils in a wrong order, meaning the app would misinterpret.
This is a very old, which went unnoticed for years.

pymodbus v3.8.6

• Allow id=0 and check if response.id == request.id. (#2572)

It turns out that not allowing id=0 was too restrictive, instead now requests with id=0 is allowed provided the device responds with id=0.

pymodbus v3.8.5

• New simulator is WIP, not to be used. (#2568)
• dev_id=0 no response expected (returns ExceptionResponse(0xff)). (#2567)
• New simulator datastore. (#2535)

pymodbus v3.8.4

• Parameterize string encoding in convert_to_registers and convert_from_registers (#2558)
• Fix client modbus function calls in remote by adding count as keyword argument (#2563)
• Fix exception text in ModbusPDU.validateAddress (#2551)
• Typo arround no_response_expected (#2550)
• Trace new connection in server. (#2549)
• Add trace to server.
• Update misleading DATATYPE text. (#2547)
• Fix pylint.
• Clarify server usage.
• Solve instable transaction testing. (#2538)

v3.8.3

Bug fix release, and remove the deprecated tag on payload.

The main goals have changed, please see https://pymodbus.readthedocs.io/en/latest/source/roadmap.html

For details on the payload decoder/encoder please see #2525

Changes:

• Remove deprecate from payload. (#2532)
• Add background parameter to servers. (#2529)
• Split async_io.py and simplify server start/stop. (#2528)
• Update custom_msg example to include server. (#2527)
• Move repl doc to repl repo. (#2522)
• Add API to set max until disconnect. (#2521)

Pymodbus v3.8.2

• Asyncio future removed from sync client. (#2514)

Pymodbus v3.8.1

• Convert endianness (#2506)
• Fix sync serial client, loop. (#2510)
• Correct future. (#2507)
• Correct #2501 (#2504)
• Raise exception on no response in async client. (#2502)
• re-instatiate Future on reconnect (#2501)
• Remove all trailing zeroes during string decoding (#2493)
• Fix too many sync client log messages. (#2491)

Pymodbus v3.8.0

This is the biggest release since 3.0.0, it contains:

• new framer concept (utility class instead of direct)
• new much simpler transactionManager
• trace methods to trace/modify incoming/outgoing byte streams as well as PDUs
• A lot of bug fixes

Version 3.8.0

• slave_id -> dev_id (internally). (#2486)
• Pin python 3.13.0 and update ruff. (#2487)
• Add documentation link to README. (#2483)
• Add datatype bits to convert_to/from_registers. (#2480)
• Add trace API to server. (#2479)
• Add trace API for client. (#2478)
• Integrate TransactionManager in server. (#2475)
• Rename test/sub_. (#2473)
• Check server closes file descriptors. (#2472)
• Update http_server.py (#2471)
• Restrict write_registers etc to list[int]. (#2469)
• Write_registers/pdu typing again. (#2468)
• Remove ModbusExceptions enum. (#2467)
• Add special ssl socket handling of "no data". (#2466)
• Add tip that values= will be modified to list[int]. (#2465)
• client 100% test coverage (#2396)
• Extend TransactionManager to handle sync. (#2457)
• Add convert_from to simple examples. (#2458)
• New async transaction manager. (#2453)
• Deprecate BinaryPayloadDecoder / BinaryPayloadBuilder. (#2456)
• Correct close for server transport. (#2455)
• RTU frame problem, when received split. (#2452)
• pdu, 100% coverage. (#2450)
• Refactor PDU, add strong typing to base classes. (#2438)
• Enforce keyword only parameters. (#2448)
• Fix read_device_information with sync client. (#2441)
• Simplify syncTransactionManager. (#2443)
• Import examples direct. (#2442)
• rename ModbusExceptions enums to legal constants. (#2436)
• Add typing to examples. (#2435)
• Refactor PDU diag. (#2421)
• Fix client lock, Parallel API calls are not permitted. (#2434)
• Ensure accept_no_response_limit > retries. (#2433)
• Check client and frametype. (#2426)
• Add MDAP to TLS frame. (#2425)
• Clean/Finalize testing for bit functions. (#2420)
• Simplify pdu bit, remove skip_encode. (#2417)
• remove zero_mode parameter. (#2354)
• Prepare refactor messages. (#2416)
• Fixed handle local echo in serialserver (#2415)
• Correct minor framer/pdu errors. (#2407)
• Rtu decode frames without byte count. (#2412)
• Improve type of parameter values of write_registers (#2411)
• PDU lookupClass work with sub function code. (#2410)
• Correct wait_next_api link in README. (#2406)