V2.3.0

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.

V2.3.0rc1

• 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.

Pymodbus V2.2.0

Version 2.2.0

NOTE: Supports python 3.7, async client is now moved to pymodbus/client/asychronous

from pymodbus.client.asynchronous import ModbusTcpClient

• 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

# Now
DEBUG:pymodbus.factory:Factory Request[ReadInputRegistersRequest: 4]
# Before
DEBUG:pymodbus.factory:Factory Request[4]

Pymodbus v2.2.0rc4

• Fix to task cancellations and CRC errors for async serial clients.

Pymodbus v2.2.0rc3

Version 2.2.0rc3

• Fix regression introduced in 2.2.0rc2 (Modbus sync client transaction failing)

Pymodbus v2.2.0rc2

Version 2.2.0

NOTE: Supports python 3.7, async client is now moved to pymodbus/client/asychronous

from pymodbus.client.asynchronous import ModbusTcpClient

• Support Python 3.7
• 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 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 .
• Minor update in factory.py, now server logs prints received request instead of only function code

# Now
DEBUG:pymodbus.factory:Factory Request[ReadInputRegistersRequest: 4]
# Before
DEBUG:pymodbus.factory:Factory Request[4]

Pymodbus v2.2.0rc1

Version 2.2.0

NOTE: Supports python 3.7, async client is now moved to pymodbus/client/asychronous

from pymodbus.client.asynchronous import AsyncModbusTCPClient as ModbusClient

• Support Python 3.7
• 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 tornado async serial client TypeError while processing incoming packet.
• Fix asyncio examples.
• Minor update in factory.py, now server logs prints received request instead of only function code

# Now
DEBUG:pymodbus.factory:Factory Request[ReadInputRegistersRequest: 4]
# Before
DEBUG:pymodbus.factory:Factory Request[4]

v2.1.0

• 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.

v2.0.1

Version 2.0.1

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

v2.0.0

Version 2.0.0

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.