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API changes

Versions (X.Y.Z) where Z > 0 e.g. 3.0.1 do NOT have API changes!

API changes 3.7.0

  • default slave changed to 1 from 0 (which is broadcast).
  • broadcast_enable, retry_on_empty, no_resend_on_retry parameters removed.
  • class method generate_ssl() added to TLS client (sync/async).
  • removed certfile, keyfile, password from TLS client, please use generate_ssl()
  • on_reconnect_callback() removed from clients (sync/async).
  • on_connect_callback(true/false) added to async clients.
  • binary framer no longer supported
  • Framer.<type> renamed to FramerType.<type>
  • PDU classes moved to pymodbus/pdu
  • Simulator config custom actions kwargs -> parameters
  • Non defined parameters (kwargs) no longer valid
  • Drop support for Python 3.8 (its no longer tested, but will probably work)

API changes 3.6.0

  • framer= is an enum: pymodbus.Framer, but still accept a framer class

API changes 3.5.0

  • Remove handler parameter from ModbusUdpServer
  • Remove loop parameter from ModbusSerialServer
  • Remove handler and allow_reuse_port from repl default config
  • Static classes from the constants module are now inheriting from enum.Enum and using UPPER_CASE naming scheme, this affects: - MoreData - DeviceInformation - ModbusPlusOperation - Endian - ModbusStatus
  • Async clients now accepts no_resend_on_retry=True, to not resend the request when retrying.
  • ModbusSerialServer now accepts request_tracer=.

API changes 3.4.0

  • Modbus<x>Client .connect() returns True/False (connected or not)
  • Modbue<x>Server handler=, allow_reuse_addr=, backlog= are no longer accepted
  • ModbusTcpClient / AsyncModbusTcpClient no longer support unix path
  • StartAsyncUnixServer / ModbusUnixServer removed (never worked on Windows)
  • ModbusTlsServer reqclicert= is no longer accepted
  • ModbusSerialServer auto_connect= is no longer accepted
  • ModbusSimulatorServer.serve_forever(only_start=False) added to allow return

API changes 3.3.0

  • ModbusTcpDiagClient is removed due to lack of support
  • Clients have an optional parameter: on_reconnect_callback, Function that will be called just before a reconnection attempt.
  • general parameter unit= -> slave=
  • move SqlSlaveContext, RedisSlaveContext to examples/contrib (due to lack of maintenance)
  • BinaryPayloadBuilder.to_string was renamed to BinaryPayloadBuilder.encode
  • on_reconnect_callback for async clients works slightly different
  • utilities/unpack_bitstring now expects an argument named data not string

API changes 3.2.0

  • helper to convert values in mixin: convert_from_registers, convert_to_registers
  • import pymodbus.version -> from pymodbus import __version__, __version_full__
  • pymodbus.pymodbus_apply_logging_config(log_file_name="pymodbus.log") to enable file pymodbus_apply_logging_config
  • pymodbus.pymodbus_apply_logging_config have default DEBUG, it not called root settings will be used.
  • pymodbus/interfaces/IModbusDecoder removed.
  • pymodbus/interfaces/IModbusFramer removed.
  • pymodbus/interfaces/IModbusSlaveContext -> pymodbus/datastore/ModbusBaseSlaveContext.
  • StartAsync<type>Server, removed defer_start argument, return is None. instead of using defer_start instantiate the Modbus<type>Server directly.
  • ReturnSlaveNoReponseCountResponse has been corrected to ReturnSlaveNoResponseCountResponse
  • Option --modbus-config for REPL server renamed to --modbus-config-path
  • client.protocol.<something> --> client.<something>
  • client.factory.<something> --> client.<something>

API changes 3.1.0

  • Added --host to client_* examples, to allow easier use.
  • unit= in client calls are no longer converted to slave=, but raises a runtime exception.
  • Added missing client calls (all standard request are not available as methods).
  • client.mask_write_register() changed parameters.
  • server classes no longer accept reuse_port= (the socket do not accept it)

API changes 3.0.0

Base for recording changes.