- 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.
- Fix unicode decoder error with BinaryPayloadDecoder in some platforms
- Avoid unnecessary import of deprecated modules with dependencies on twisted
Note This is a Major release and might affect your existing Async client implementation. Refer examples on how to use the latest async clients.
- 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.
Note This is a Major release and might affect your existing Async client implementation. Refer examples on how to use the latest async clients.
- Async client implementation based on Tornado, Twisted and asyncio
- Fix serial client is_socket_open method
- 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.
res = client.read_holding_registers(...)
if not res.isError():
# proceed
else:
# handle error or raise- Add examples for MEI read device information request
- 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
client = Client(..., retry_on_empty=True)
- 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
- 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 Asyncronous 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
- 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 recieved without header and CRC
- Fix tests
- 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
- 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
- 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
- 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)
Please view the git commit log