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Changelog

All these version would not be possible without a lot of work from volunteers!

We, the maintainers, are greatful for each pull requests small or big, that helps make pymodbus a better product.

Authors: contains a complete list of volunteers have contributed to each major version.

Version 3.6.8

  • Allow socket exception response with wrong length

Version 3.6.7

  • Add lock to async requests, correct logging and length calc. (FIX, not on dev)
  • test_simulator: use unused_tcp_port fixture (#2141)
  • streamline imports in Factory.py (#2140)
  • Secure testing is done with pymodbus in PR. (#2136)
  • Fix link to github in README (#2134)
  • Wildcard exception catch from pyserial. (#2125)
  • Problem with stale CI. (#2117)
  • Add connection exception to list of exceptions catpured in retries (#2113)
  • Move on_reconnect to client level (#2111)
  • Bump github stale. (#2110)
  • update package_test_tool (add 4 test scenarios) (#2107)
  • Bump dependencies. (#2108)
  • Cancel send if no connection. (#2103)

Version 3.6.6

  • Solve transport close() as not inherited method. (#2098)
  • enable mypy --check-untyped-defs (#2096)
  • Add get_expected_response_length to transaction.
  • Remove control encode in framersRemove control encode in framers. (#2095)
  • Bump codeql in CI to v3. (#2093)
  • Improve server types (#2092)
  • Remove pointless try/except (#2091)
  • Improve transport types (#2090)
  • Use explicit ValueError when called with incorrect function code (#2089)
  • update message tests (incorporate all old tests). (#2088)
  • Improve simulator type hints (#2084)
  • Cleanup dead resetFrame code (#2082)
  • integrate message.encode() into framer.buildPacket. (#2062)
  • Repair client close() (intern= is needed for ModbusProtocol). (#2080)
  • Updated Message_Parser example (#2079)
  • Fix #2069 use released repl from pypi (#2077)
  • Fix field encoding of Read File Record Response (#2075)
  • Improve simulator types (#2076)
  • Bump actions. (#2071)

Version 3.6.5

  • Update framers to ease message integration (only decode/encode) (#2064)
  • Add negtive acknowledge to modbus exceptions (#2065)
  • add Message Socket/TLS and amend tests. (#2061)
  • Improve factory types (#2060)
  • ASCII. (#2054)
  • Improve datastore documentation (#2056)
  • Improve types for messages (#2058)
  • Improve payload types (#2057)
  • Reorganize datastore inheritance (#2055)
  • Added new message (framer) raw + 100%coverage. (#2053)
  • message classes, first step (#1932)
  • Use AbstractMethod in transport. (#2051)
  • A datastore for each slave. (#2050)
  • Only run coverage in ubuntu / python 3.12 (#2049)
  • Replace lambda with functools.partial in transport. (#2047)
  • Move self.loop in transport to init() (#2046)
  • Fix decoder bug (#2045)
  • Add support for server testing in package_test_tool. (#2044)
  • DictTransactionManager -> ModbusTransactionManager (#2042)
  • eliminate redundant server_close() (#2041)
  • Remove reactive server (REPL server). (#2038)
  • Improve types for client (#2032)
  • Improve HTTP server type hints (#2035)
  • eliminate asyncio.sleep() and replace time.sleep() with a timeout (#2034)
  • Use "new" inter_byte_timeout and is_open for pyserial (#2031)
  • Add more type hints to datastore (#2028)
  • Add more framer tests, solve a couple of framer problems. (#2024)
  • Rework slow tests (use NULL_MODEM) (#1995)
  • Allow slave=0 in serial communication. (#2023)
  • Client package test tool. (#2022)
  • Add REPL documentation back with links to REPL repo (#2017)
  • Move repl to a seperate repo (#2009)
  • solve more mypy issues with client (#2013)
  • solve more mypy issues with datastore (#2010)
  • Remove useless. (#2011)
  • streamline transport tests. (#2004)
  • Improve types for REPL (#2007)
  • Specify more types in base framer (#2005)
  • Move htmlcov -> build/cov (#2003)
  • Avoid pylint complain about lambda. (#1999)
  • Improve client types (#1997)
  • Fix setblocking call (#1996)
  • Actívate warnings in pytest. (#1994)
  • Add profile option to pytest. (#1991)
  • Simplify message tests (#1990)
  • Upgrade pylint and ruff (#1989)
  • Add first architecture document. (#1988)
  • Update CONTRIBUTING.rst.
  • Return None for broadcast. (#1987)
  • Make ModbusClientMixin Generic to fix type issues for sync and async (#1980)
  • remove strange None default (#1984)
  • Fix incorrect bytearray type hint in diagnostics query (#1983)
  • Fix URL to CHANGELOG (#1979)
  • move server_hostname to be local in tls client. (#1978)
  • Parameter "strict" is and was only used for serial server/client. (#1975)
  • Removed unused parameter close_comm_on_error. (#1974)

Version 3.6.4

  • Update datastore_simulator example with client (#1967)
  • Test and correct receiving more than one packet (#1965)
  • Remove unused FifoTransactionManager. (#1966)
  • Always set exclusive serial port access. (#1964)
  • Add server/client network stub, to allow test of network packets. (#1963)
  • Combine conftest to a central file (#1962)
  • Call on_reconnect_callback. (#1959)
  • Readd ModbusBaseClient to external API.
  • Update README.rst
  • minor fix for typo and consistency (#1946)
  • More coverage. (#1947)
  • Client coverage 100%. (#1943)
  • Run coverage in CI with % check of coverage. (#1945)
  • transport 100% coverage. (#1941)
  • contrib example: TCP drainage simulator with two devices (#1936)
  • Remove "pragma no cover". (#1935)
  • transport_serial -> serialtransport. (#1933)
  • Fix behavior after Exception response (#1931)
  • Correct expected length for udp sync client. (#1930)

Version 3.6.3

  • solve Socket_framer problem with Exception response (#1925)
  • Allow socket frames to be split in multiple packets (#1923)
  • Reset frame for serial connections.
  • Source address None not 0.0.0.0 for IPv6
  • Missing Copyright in License file
  • Correct wrong url to modbus protocol spec.
  • Fix serial port in TestComm.

Version 3.6.2

  • Set documentation to v3.6.2.

Version 3.6.1

  • Solve pypi upload error.

Version 3.6.0

  • doc: Fix a code mismatch in client.rst
  • Update README.
  • truncated duration to milliseconds
  • Update examples for current dev.
  • Ignore all remaining implicit optional (#1888)
  • docstring
  • Remove unnecessary abort() call
  • Enable RUF013 (implicit optional) (#1882)
  • Support aiohttp 3.9.0b1 (#1886)
  • Actually perform aiohttp runner teardown
  • Pin to working aiohttp (#1884)
  • Docstring typo cleanup (#1879)
  • Clean client API imports. (#1819)
  • Update issue template.
  • Eliminiate implicit optional in reconnect_delay* (#1874)
  • Split client base in sync/async version (#1878)
  • Rework host/port and listener setup (#1866)
  • use baudrate directly (#1872)
  • Eliminate more implicit optional (#1871)
  • Fix serial server args order (#1870)
  • Relax test task/thread checker. (#1867)
  • Make doc link references version dependent. (#1864)
  • Remove pre-commit (#1860)
  • Ruff reduce ignores. (#1862)
  • Bump ruff to 0.1.3 and remove ruff.toml (#1861)
  • More elegant noop. (#1859)
  • Cache (#1829)
  • Eliminate more implicit optional (#1858)
  • Ignore files downloaded by pytest (#1857)
  • Avoid malicious user path input (#1855)
  • Add more return types to transport (#1852)
  • Do not attempt to close an already-closed serial connection (#1853)
  • Fix stopbits docstring typo (#1850)
  • Convert type hints to PEP585 (#1846)
  • Eliminate even more implicit optional (#1845)
  • Eliminate more implicit optionals in client (#1844)
  • Eliminate implicit optional in transport_serial (#1843)
  • Make client type annotations compatible with async client usage (#1842)
  • Merge pull request #1838 from pymodbus-dev/ruff
  • Eliminate implicit optional in simulator (#1841)
  • eliminate implicit optional for callback_disconnected (#1840)
  • pre-commit run --all-files
  • Update exclude paths
  • Replace black with ruff
  • Use other dependency groups for 'all' (#1834)
  • Cleanup author/maintainer fields (#1833)
  • Consistent messages if imports fail (#1831)
  • Client/Server framer as enum. (#1822)
  • Solve relative path in examples. (#1828)
  • Eliminate implicit optional for CommParams types (#1825)
  • Add 3.12 classifier (#1826)
  • Bump actions/stale to 8.0.0 (#1824)
  • Cleanup paths included in mypy/pylint (#1823)
  • Client documentation amended and updated. (#1820)
  • Import aiohttp in way pleasing mypy. (#1818)
  • Update doc, remove md files. (#1814)
  • Bump dependencies. (#1816)
  • Solve pylint / pytest.
  • fix pylint.
  • Examples are without parent module.
  • Wrong zip of examples.
  • Serial delay (#1810)
  • Add python 3.12. (#1800)
  • Release errors (pyproject.toml changes). (#1811)

Version 3.5.4

  • Release errors (pyproject.toml changes). (#1811)

Version 3.5.3

  • Simplify transport_serial (modbus use) (#1808)
  • Reduce transport_serial (#1807)
  • Change to pyproject.toml. (#1805)
  • fixes access to asyncio loop via loop property of SerialTransport (#1804)
  • Bump aiohttp to support python 3.12. (#1802)
  • README wrong links. (#1801)
  • CI caching. (#1796)
  • Solve pylint unhappy. (#1799)
  • Clean except last 7 days. (#1798)
  • Reconect_delay == 0, do not reconnect. (#1795)
  • Update simulator.py method docstring (#1793)
  • add type to isError. (#1781)
  • Allow repr(ModbusException) to return complete information (#1779)
  • Update docs. (#1777)

Version 3.5.2

  • server tracer example. (#1773)
  • sync connect missing. (#1772)
  • simulator future problem. (#1771)

Version 3.5.1

  • Always close socket on error (reset_sock). (#1767)
  • Revert reset_socket change.
  • add close_comm_on_error to example.
  • Test long term (HomeAsistant problem). (#1765)
  • Update ruff to 0.0.287 (#1764)
  • Remove references to ModbusSerialServer.start (#1759) (#1762)
  • Readd test to get 100% coverage.
  • transport: Don't raise a RunTimeError in ModbusProtocol.error_received() (#1758)

Version 3.5.0

  • Async retry (#1752)
  • test_client: Fix test_client_protocol_execute() (#1751)
  • Use enums for constants (#1743)
  • Local Echo Broadcast with Async Clients (#1744)
  • Fix #1746 . Return missing result (#1748)
  • Document nullmodem. (#1739)
  • Add system health check to all tests. (#1736)
  • Handle partial message in ReadDeviceInformationResponse (#1738)
  • Broadcast with Handle Local Echo (#1737)
  • transport_emulator, part II. (#1710)
  • Added file AUTHORS, to list all Volunteers. (#1734)
  • Fix #1702 and #1728 (#1733)
  • Clear retry count when success. (#1732)
  • RFC: Reduce parameters for REPL server classes (#1714)
  • retries=1, solved. (#1731)
  • Impoved the example "server_updating.py" (#1720)
  • pylint 3.11 (#1730)
  • Correct retry loop. (#1729)
  • Fix faulty not check (#1725)
  • bugfix local echo handling on sync clients (#1723)
  • Updated copyright in LICENSE.
  • Correct README pre-commit.
  • Fix custom message parsing in RTU framer (#1716)
  • Request tracer (#1715)
  • pymodbus.server: allow strings for "-p" paramter (#1713)
  • New nullmodem and transport. (#1696)
  • xdist loadscope (test is not split). (#1708)
  • Add client performance example. (#1707)

Version 3.4.1

  • Fix serial startup problems. (#1701)
  • pass source_address in tcp client. (#1700)
  • serial server use source_address[0]. (#1699)
  • Examples coverage nearly 100%. (#1694)
  • new async serial (#1681)
  • Docker is not supported (lack of maintainer). (#1693)
  • Forwarder write_coil --> write_coil. (#1691)
  • Change default source_address to (0.0.0.0, 502) (#1690)
  • Update ruff to 0.0.277 (#1689)
  • Fix dict comprehension (#1687)
  • Removed requests dependency from contrib/explain.py (#1688)
  • Fix broken test (#1685)
  • Fix readme badges (#1682)
  • Bump aiohttp from 3.8.3 to 3.8.5 (#1680)
  • pygments from 2.14.0 to 2.15.0 (#1677)

Version 3.4.0

  • Handle partial local echo. (#1675)
  • clarify handle_local_echo. (#1674)
  • async_client: add retries/reconnect. (#1672)
  • Fix 3.11 problem. (#1673)
  • Add new example simulator server/client. (#1671)
  • examples/contrib/explain.py leveraging Rapid SCADA (#1665)
  • _logger missed basicConfig. (#1670)
  • Bug fix for #1662 (#1663)
  • Bug fix for #1661 (#1664)
  • Fix typo in config.rst (#1660)
  • test action_increment. (#1659)
  • test codeql (#1655)
  • mypy complaints. (#1656)
  • Remove self.params from async client (#1640)
  • Drop test of pypy with python 3.8.
  • repair server_async.py (#1644)
  • move common framer to base. (#1639)
  • Restrict Return diag call to bytes. (#1638)
  • use slave= in diag requests. (#1636)
  • transport listen in server. (#1628)
  • CI test.
  • Integrate transport in server. (#1617)
  • fix getFrameStart for ExceptionResponse (#1627)
  • Add min/min to simulator actions.
  • Change to "sync client" in forwarder example (#1625)
  • Remove docker (lack of maintenance). (#1623)
  • Clean defaults (#1618)
  • Reduce CI log with no debug. (#1616)
  • prepare server to use transport. (#1607)
  • Fix RemoteSlaveContext (#1599)
  • Combine stale and lock. (#1608)
  • update pytest + extensions. (#1610)
  • Change version follow PEP 440. (#1609)
  • Fix regression with REPL server not listening (#1604)
  • Remove handler= for server classes. (#1602)
  • Fix write function codes (#1598)
  • transport nullmodem (#1591)
  • move test of examples to subdirectory. (#1592)
  • transport as object, not base class. (#1572)
  • Simple examples. (#1590)
  • transport_connect as bool. (#1587)
  • Prepare dev (#1588)
  • Release corrections. (#1586)

Version 3.3.2

  • Fix RemoteSlaveContext (#1599)
  • Change version follow PEP 440. (#1609)
  • Fix regression with REPL server not listening (#1604)
  • Fix write function codes (#1598)
  • Release corrections. (#1586)

Version 3.3.1

  • transport fixes and 100% test coverage. (#1580)
  • Delay self.loop until connect(). (#1579)
  • Added mechanism to determine if server did not start cleanly (#1539)
  • Proof transport reconnect works. (#1577)
  • Fix non-shared block doc in config.rst. (#1573)

Version 3.3.0

  • Stabilize windows tests. (#1567)
  • Bump mypy 1.3.0 (#1568)
  • Transport integrated in async clients. (#1541)
  • Client async corrections (due to 3.1.2) (#1565)
  • Server_async[udp], solve 3.1.1 problem. (#1564)
  • Remove ModbusTcpDiagClient. (#1560)
  • Remove old method from Python2/3 transition (#1559)
  • Switch to ruff's version of bandit (#1557)
  • Allow reading/writing address 0 in the simulator (#1552)
  • Remove references to "defer_start". (#1548)
  • Client more robust against faulty response. (#1547)
  • Fix missing package_data directives for simulator web (#1544)
  • Fix installation instructions (#1543)
  • Solve pytest timeout problem. (#1540)
  • DiagnosticStatus encode missing tuple check. (#1533)
  • test SparseDataStore. (#1532)
  • BinaryPayloadBuilder.to_string to BinaryPayloadBuilder.encode (#1526)
  • Adding flake8-pytest-style` to ruff (#1520)
  • Simplify version management. (#1522)
  • pylint and pre-commit autoupdate (#1519)
  • Add type hint (#1512)
  • Add action to lock issues/PR. (#1508)
  • New common transport layer. (#1492)
  • Solve serial close raise problem.
  • Remove old config values (#1503)
  • Document pymodbus.simulator. (#1502)
  • Refactor REPL server to reduce complexity (#1499)
  • Don't catch KeyboardInterrupt twice for REPL server (#1498)
  • Refactor REPL client to reduce complexity (#1489)
  • pymodbus.server: listen on ID 1 by default (#1496)
  • Clean framer/__init__.py (#1494)
  • Duplicate transactions in UDP. (#1486)
  • clean ProcessIncommingPacket. (#1491)
  • Enable pyupgrade (U) rules in ruff (#1484)
  • clean_workflow.yaml solve parameter problem.
  • Correct wrong import in test. (#1483)
  • Implement pyflakes-simplify (#1480)
  • Test case for UDP duplicate msg issue (#1470)
  • Test of write_coil. (#1479)
  • Test reuse of client object. (#1475)
  • Comment about addressing when shared=false (#1474)
  • Remove old aliases to OSError (#1473)
  • pymodbus.simulator fixes (#1463)
  • Fix wrong error message with pymodbus console (#1456)
  • update modbusrtuframer (#1435)
  • Server multidrop test.: (#1451)
  • mypy problem ModbusResponse.

Version 3.2.2

  • Add forgotten await

Version 3.2.1

  • add missing server.start(). (#1443)
  • Don't publish univeral (Python2 / Python 3) wheels (#1423)
  • Remove unneccesary custom LOG_LEVEL check (#1424)
  • Include py.typed in package (#1422)

Version 3.2.0

  • Add value <-> registers converter helpers. (#1413)
  • Add pre-commit config (#1406)
  • Make baud rate configurable for examples (#1410)
  • Clean __init and update log module. (#1411)
  • Simulator add calls functionality. (#1390)
  • Add note about not being thread safe. (#1404)
  • Update docker-publish.yml
  • Forward retry_on_empty and retries by calling transaction (#1401)
  • serial sync recv interval (#1389)
  • Add tests for writing multiple writes with a single value (#1402)
  • Enable mypy in CI (#1388)
  • Limit use of Singleton. (#1397)
  • Cleanup interfaces (#1396)
  • Add request names. (#1391)
  • Simulator, register look and feel. (#1387)
  • Fix enum for REPL server (#1384)
  • Remove unneeded attribute (#1383)
  • Fix mypy errors in reactive server (#1381)
  • remove nosec (#1379)
  • Fix type hints for http_server (#1369)
  • Merge pull request #1380 from pymodbus-dev/requirements
  • remove second client instance in async mode. (#1367)
  • Pin setuptools to prevent breakage with Version including "X" (#1373)
  • Lint and type hints for REPL (#1364)
  • Clean mixin execute (#1366)
  • Remove unused setup_commands.py. (#1362)
  • Run black on top-level files and /doc (#1361)
  • repl config path (#1359)
  • Fix NoReponse -> NoResponse (#1358)
  • Make whole main async. (#1355)
  • Fix more typing issues (#1351)
  • Test sync task (#1341)
  • Fixed text in ModbusClientMixin's writes (#1352)
  • lint /doc (#1345)
  • Remove unused linters (#1344)
  • Allow log level as string or integer. (#1343)
  • Sync serial, clean recv. (#1340)
  • Test server task, async completed (#1318)
  • main() should be sync (#1339)
  • Bug: Fixed caused by passing wrong arg (#1336)

Version 3.1.3

  • Solve log problem in payload.
  • Fix register type check for size bigger than 3 registers (6 bytes) (#1323)
  • Re-add SQL tests. (#1329)
  • Central logging. (#1324)
  • Skip sqlAlchemy test. (#1325)
  • Solve 1319 (#1320)

Version 3.1.2

  • Update README.rst
  • Correct README link. (#1316)
  • More direct readme links for REPL (#1314)
  • Add classifier for 3.11 (#1312)
  • Update README.rst (#1313)
  • Delete ModbusCommonBlock.png (#1311)
  • Add modbus standard to README. (#1308)
  • fix no auto reconnect after close/connect in TCPclient (#1298)
  • Update examples.rst (#1307)
  • var name clarification (#1304)
  • Bump external libraries. (#1302)
  • Reorganize documentation to make it easier accessible (#1299)
  • Simulator documentation (first version). (#1296)
  • Updated datastore Simulator. (#1255)
  • Update links to pydmodbus-dev (#1291)
  • Change riptideio to pymodbus-dev. (#1292)
  • #1258 Avoid showing unit as a seperate command line argument (#1288)
  • Solve docker cache problem. (#1287)

Version 3.1.1

  • add missing server.start() (#1282)
  • small performance improvement on debug log (#1279)
  • Fix Unix sockets parsing (#1281)
  • client: Allow unix domain socket. (#1274)
  • transfer timeout to protocol object. (#1275)
  • Add ModbusUnixServer / StartAsyncUnixServer. (#1273)
  • Added return in AsyncModbusSerialClient.connect (#1271)
  • add connect() to the very first example (#1270)
  • Solve docker problem. (#1268)
  • Test stop of server task. (#1256)

Version 3.1.0

  • Add xdist pr default. (#1253)
  • Create docker-publish.yml (#1250)
  • Parallelize pytest with pytest-xdist (#1247)
  • Support Python3.11 (#1246)
  • Fix reconnectDelay to be within (100ms, 5min) (#1244)
  • Fix typos in comments (#1233)
  • WEB simulator, first version. (#1226)
  • Clean async serial problem. (#1235)
  • terminate when using 'randomize' and 'change_rate' at the same time (#1231)
  • Used tooled python and OS (#1232)
  • add 'change_rate' randomization option (#1229)
  • add check_ci.sh (#1225)
  • Simplify CI and use cache. (#1217)
  • Solve issue 1210, update simulator (#1211)
  • Add missing client calls in mixin.py. (#1206)
  • Advanced simulator with cross memory. (#1195)
  • AsyncModbusTcp/UdpClient honors delay_ms == 0 (#1203) (#1205)
  • Fix #1188 and some pylint issues (#1189)
  • Serial receive incomplete bytes.issue #1183 (#1185)
  • Handle echo (#1186)
  • Add updating server example. (#1176)

Version 3.0.2

  • Add pygments as requirement for repl
  • Update datastore remote to handle write requests (#1166)
  • Allow multiple servers. (#1164)
  • Fix typo. (#1162)
  • Transfer parms. to connected client. (#1161)
  • Repl enhancements 2 (#1141)
  • Server simulator with datastore with json data. (#1157)
  • Avoid unwanted reconnects (#1154)
  • Do not initialize framer twice. (#1153)
  • Allow timeout as float. (#1152)
  • Improve Docker Support (#1145)
  • Fix unreachable code in AsyncModbusTcpClient (#1151)
  • Fix type hints for port and timeout (#1147)
  • Start/stop multiple servers. (#1138)
  • Server/asyncio.py correct logging when disconnecting the socket (#1135)
  • Add Docker and container registry support (#1132)
  • Removes undue reported error when forwarding (#1134)
  • Obey timeout parameter on connection (#1131)
  • Readme typos (#1129)
  • Clean noqa directive. (#1125)
  • Add isort and activate CI fail for black/isort. (#1124)
  • Update examples. (#1117)
  • Move logging configuration behind function call (#1120)
  • serial2TCP forwarding example (#1116)
  • Make serial import dynamic. (#1114)
  • Bugfix ModbusSerialServer setup so handler is called correctly. (#1113)
  • Clean configurations. (#1111)

Version 3.0.1

  • Faulty release!

Version 3.0.0

  • Solve multiple incomming frames. (#1107)
  • Up coverage, tests are 100%. (#1098)
  • Prepare for rc1. (#1097)
  • Prepare 3.0.0dev5 (#1095)
  • Adapt serial tests. (#1094)
  • Allow windows. (#1093)
  • Remove server sync code and combine with async code. (#1092)
  • Solve test of tls by adding certificates and remove bugs (#1080)
  • Simplify server implementation. (#1071)
  • Do not filter using unit id in the received response (#1076)
  • Hex values for repl arguments (#1075)
  • All parameters in class parameter. (#1070)
  • Add len parameter to decode_bits. (#1062)
  • New combined test for all types of clients. (#1061)
  • Dev mixin client (#1056)
  • Add/update client documentation, including docstrings etc. (#1055)
  • Add unit to arguments (#1041)
  • Add timeout to all pytest. (#1037)
  • Simplify client parent classes. (#1018)
  • Clean copyright statements, to ensure we follow FOSS rules. (#1014)
  • Rectify sync/async client parameters. (#1013)
  • Clean client directory structure for async. (#1010)
  • Remove async_io, simplify AsyncModbus<x>Client. (#1009)
  • remove init<something>_client(). (#1008)
  • Remove async factory. (#1001)
  • Remove loop parameter from client/server (#999)
  • add example async client. (#997)
  • Change async ModbusSerialClient to framer= from method=. (#994)
  • Add forwarder example with multiple slaves. (#992)
  • Remove async get_factory. (#990)
  • Remove unused ModbusAccessControl. (#989)
  • Solve problem with remote datastore. (#988)
  • Remove unused schedulers. (#976)
  • Remove twisted (#972)
  • Remove/Update tornado/twister tests. (#971)
  • remove easy_install and ez_setup (#964)
  • Fix mask write register (#961)
  • Activate pytest-asyncio. (#949)
  • Changed default framer for serial to be ModbusRtuFramer. (#948)
  • Remove tornado. (#935)
  • Pylint, check method parameter documentation. (#909)
  • Add get_response_pdu_size to mask read/write. (#922)
  • Minimum python version is 3.8. (#921)
  • Ensure make doc fails on warnings and/or errors. (#920)
  • Remove central makefile. (#916)
  • Re-organize examples (#914)
  • Documentation cleanup and clarification (#689)
  • Update doc for repl. (#910)
  • Include package and tests in coverage measurement (#912)
  • Use response byte length if available (#880)
  • better fix for rtu incomplete frames (#511)
  • Remove twisted/tornado from doc. (#904)
  • Update classifiers for pypi. (#907)
  • Documentation updates
  • PEP8 compatibale code
  • More tooling and CI updates
  • Remove python2 compatibility code (#564)
  • Remove Python2 checks and Python2 code snippets
  • Misc co-routines related fixes
  • Fix CI for python3 and remove PyPI from CI
  • Fix mask_write_register call. (#685)
  • Add support for byte strings in the device information fields (#693)
  • Catch socket going away. (#722)
  • Misc typo errors (#718)
  • Support python3.10
  • Implement asyncio ModbusSerialServer
  • ModbusTLS updates (tls handshake, default framer)
  • Support broadcast messages with asyncio client
  • Fix for lazy loading serial module with asyncio clients.
  • Updated examples and tests
  • Support python3.7 and above
  • Support creating asyncio clients from with in coroutines.

Version 2.5.3

  • Fix retries on tcp client failing randomly.
  • Fix Asyncio client timeout arg not being used.
  • Treat exception codes as valid responses
  • Fix examples (modbus_payload)
  • Add missing identity argument to async ModbusSerialServer

Version 2.5.2

  • Add kwarg reset_socket to control closing of the socket on read failures (set to True by default).
  • Add --reset-socket/--no-reset-socket to REPL client.

Version 2.5.1

  • Bug fix TCP Repl server.
  • Support multiple UID's with REPL server.
  • Support serial for URL (sync serial client)
  • Bug fix/enhancements, close socket connections only on empty or invalid response

Version 2.5.0

  • Support response types stray and empty in repl server.
  • Minor updates in asyncio server.
  • Update reactive server to send stray response of given length.
  • Transaction manager updates on retries for empty and invalid packets.
  • Test fixes for asyncio client and transaction manager.
  • Fix sync client and processing of incomplete frames with rtu framers
  • Support synchronous diagnostic client (TCP)
  • Server updates (REPL and async)
  • Handle Memory leak in sync servers due to socketserver memory leak
  • Minor fix in documentations
  • Travis fix for Mac OSX
  • Disable unnecessary deprecation warning while using async clients.
  • Use Github actions for builds in favor of travis.
  • Documentation updates
  • Disable strict mode by default.
  • Fix ReportSlaveIdRequest request
  • Sparse datablock initialization updates.
  • Support REPL for modbus server (only python3 and asyncio)
  • Fix REPL client for write requests
  • Fix examples
  • Asyncio server
  • Asynchronous server (with custom datablock)
  • Fix version info for servers
  • Fix and enhancements to Tornado clients (seril and tcp)
  • Fix and enhancements to Asyncio client and server
  • Update Install instructions
  • Synchronous client retry on empty and error enhancments
  • Add new modbus state RETRYING
  • Support runtime response manipulations for Servers
  • Bug fixes with logging module in servers
  • Asyncio modbus serial server support

Version 2.4.0

  • Support async moduls tls server/client
  • Add local echo option
  • Add exponential backoffs on retries.
  • REPL - Support broadcasts.
  • Fix framers using wrong unit address.
  • Update documentation for serial_forwarder example
  • Fix error with rtu client for local_echo
  • Fix asyncio client not working with already running loop
  • Fix passing serial arguments to async clients
  • Support timeouts to break out of responspe await when server goes offline
  • Misc updates and bugfixes.

Version 2.3.0

  • Support Modbus TLS (client / server)
  • Distribute license with source
  • BinaryPayloadDecoder/Encoder now supports float16 on python3.6 and above
  • Fix asyncio UDP client/server
  • Minor cosmetic updates
  • Asyncio Server implementation (Python 3.7 and above only)
  • Bug fix for DiagnosticStatusResponse when odd sized response is received
  • Remove Pycrypto from dependencies and include cryptodome instead
  • Remove SIX requirement pinned to exact version.
  • Minor bug-fixes in documentations.

Version 2.2.0

  • Support Python 3.7
  • Fix to task cancellations and CRC errors for async serial clients.
  • Fix passing serial settings to asynchronous serial server.
  • Fix AttributeError when setting interCharTimeout for serial clients.
  • Provide an option to disable inter char timeouts with Modbus RTU.
  • Add support to register custom requests in clients and server instances.
  • Fix read timeout calculation in ModbusTCP.
  • Fix SQLDbcontext always returning InvalidAddress error.
  • Fix SQLDbcontext update failure
  • Fix Binary payload example for endianess.
  • Fix BinaryPayloadDecoder.to_coils and BinaryPayloadBuilder.fromCoils methods.
  • Fix tornado async serial client TypeError while processing incoming packet.
  • Fix erroneous CRC handling in Modbus RTU framer.
  • Support broadcasting in Modbus Client and Servers (sync).
  • Fix asyncio examples.
  • Improved logging in Modbus Server .
  • ReportSlaveIdRequest would fetch information from Device identity instead of hardcoded Pymodbus.
  • Fix regression introduced in 2.2.0rc2 (Modbus sync client transaction failing)
  • Minor update in factory.py, now server logs prints received request instead of only function code

Version 2.1.0

  • Fix Issues with Serial client where in partial data was read when the response size is unknown.
  • Fix Infinite sleep loop in RTU Framer.
  • Add pygments as extra requirement for repl.
  • Add support to modify modbus client attributes via repl.
  • Update modbus repl documentation.
  • More verbose logs for repl.

Version 2.0.1

  • Fix unicode decoder error with BinaryPayloadDecoder in some platforms
  • Avoid unnecessary import of deprecated modules with dependencies on twisted

Version 2.0.0

  • Async client implementation based on Tornado, Twisted and asyncio with backward compatibility support for twisted client.
  • Allow reusing existing[running] asyncio loop when creating async client based on asyncio.
  • Allow reusing address for Modbus TCP sync server.
  • Add support to install tornado as extra requirement while installing pymodbus.
  • Support Pymodbus REPL
  • Add support to python 3.7.
  • Bug fix and enhancements in examples.
  • Async client implementation based on Tornado, Twisted and asyncio

Version 1.5.2

  • Fix serial client is_socket_open method

Version 1.5.1

  • Fix device information selectors
  • Fixed behaviour of the MEI device information command as a server when an invalid object_id is provided by an external client.
  • Add support for repeated MEI device information Object IDs (client/server)
  • Added support for encoding device information when it requires more than one PDU to pack.
  • Added REPR statements for all syncchronous clients
  • Added isError method to exceptions, Any response received can be tested for success before proceeding.
  • Add examples for MEI read device information request

Version 1.5.0

  • Improve transaction speeds for sync clients (RTU/ASCII), now retry on empty happens only when retry_on_empty kwarg is passed to client during intialization
  • Fix tcp servers (sync/async) not processing requests with transaction id > 255
  • Introduce new api to check if the received response is an error or not (response.isError())
  • Move timing logic to framers so that irrespective of client, correct timing logics are followed.
  • Move framers from transaction.py to respective modules
  • Fix modbus payload builder and decoder
  • Async servers can now have an option to defer reactor.run() when using Start<Tcp/Serial/Udo>Server(...,defer_reactor_run=True)
  • Fix UDP client issue while handling MEI messages (ReadDeviceInformationRequest)
  • Add expected response lengths for WriteMultipleCoilRequest and WriteMultipleRegisterRequest
  • Fix _rtu_byte_count_pos for GetCommEventLogResponse
  • Add support for repeated MEI device information Object IDs
  • Fix struct errors while decoding stray response
  • Modbus read retries works only when empty/no message is received
  • Change test runner from nosetest to pytest
  • Fix Misc examples

Version 1.4.0

  • Bug fix Modbus TCP client reading incomplete data
  • Check for slave unit id before processing the request for serial clients
  • Bug fix serial servers with Modbus Binary Framer
  • Bug fix header size for ModbusBinaryFramer
  • Bug fix payload decoder with endian Little
  • Payload builder and decoder can now deal with the wordorder as well of 32/64 bit data.
  • Support Database slave contexts (SqlStore and RedisStore)
  • Custom handlers could be passed to Modbus TCP servers
  • Asynchronous Server could now be stopped when running on a seperate thread (StopServer)
  • Signal handlers on Asynchronous servers are now handled based on current thread
  • Registers in Database datastore could now be read from remote clients
  • Fix examples in contrib (message_parser.py/message_generator.py/remote_server_context)
  • Add new example for SqlStore and RedisStore (db store slave context)
  • Fix minor comaptibility issues with utilities.
  • Update test requirements
  • Update/Add new unit tests
  • Move twisted requirements to extra so that it is not installed by default on pymodbus installtion

Version 1.3.2

  • ModbusSerialServer could now be stopped when running on a seperate thread.
  • Fix issue with server and client where in the frame buffer had values from previous unsuccesful transaction
  • Fix response length calculation for ModbusASCII protocol
  • Fix response length calculation ReportSlaveIdResponse, DiagnosticStatusResponse
  • Fix never ending transaction case when response is received without header and CRC
  • Fix tests

Version 1.3.1

  • Recall socket recv until get a complete response
  • Register_write_message.py: Observe skip_encode option when encoding a single register request
  • Fix wrong expected response length for coils and discrete inputs
  • Fix decode errors with ReadDeviceInformationRequest and ReportSlaveIdRequest on Python3
  • Move MaskWriteRegisterRequest/MaskWriteRegisterResponse to register_write_message.py from file_message.py
  • Python3 compatible examples [WIP]
  • Misc updates with examples
  • Fix encoding problem for ReadDeviceInformationRequest method on python3
  • Fix problem with the usage of ord in python3 while cleaning up receive buffer
  • Fix struct unpack errors with BinaryPayloadDecoder on python3 - string vs bytestring error
  • Calculate expected response size for ReadWriteMultipleRegistersRequest
  • Enhancement for ModbusTcpClient, ModbusTcpClient can now accept connection timeout as one of the parameter
  • Misc updates
  • Timing improvements over MODBUS Serial interface
  • Modbus RTU use 3.5 char silence before and after transactions
  • Bug fix on FifoTransactionManager , flush stray data before transaction
  • Update repository information
  • Added ability to ignore missing slaves
  • Added ability to revert to ZeroMode
  • Passed a number of extra options through the stack
  • Fixed documenation and added a number of examples

Version 1.2.0

  • Reworking the transaction managers to be more explicit and to handle modbus RTU over TCP.
  • Adding examples for a number of unique requested use cases
  • Allow RTU framers to fail fast instead of staying at fault
  • Working on datastore saving and loading

Version 1.1.0

  • Fixing memory leak in clients and servers (removed __del__)
  • Adding the ability to override the client framers
  • Working on web page api and GUI
  • Moving examples and extra code to contrib sections
  • Adding more documentation

Version 1.0.0

  • Adding support for payload builders to form complex encoding and decoding of messages.
  • Adding BCD and binary payload builders
  • Adding support for pydev
  • Cleaning up the build tools
  • Adding a message encoding generator for testing.
  • Now passing kwargs to base of PDU so arguments can be used correctly at all levels of the protocol.
  • A number of bug fixes (see bug tracker and commit messages)