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include requirements.txt | ||
include README.rst | ||
include pyproject.toml | ||
include README.md | ||
include CHANGELOG.rst | ||
include LICENSE |
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# PyModbus - A Python Modbus Stack | ||
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Pymodbus is a full Modbus protocol implementation using a synchronous or | ||
asynchronous core. The library consist of 4 parts: | ||
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- **client**, connect to your favorite device | ||
- **server**, simulate your favorite device | ||
- **repl**, a text based client/server simulator | ||
- **simulator**, a html based server simulator | ||
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Pymodbus: | ||
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- implement the modbus standard protocol, with the possibility to add | ||
customizations. | ||
- support serial (rs-485), tcp, tls and udp communication. | ||
- support all standard frames: socket, rtu, rtu-over-tcp, tcp and | ||
ascii. | ||
- can be used without any third party dependencies (aside from | ||
pyserial) | ||
- is a very lightweight project. | ||
- requires Python \>= 3.8. | ||
- provides a lot of ready to use examples. | ||
- provides a server/client simulators. | ||
- have a thorough test suite, that test all corners of the library. | ||
- Tested automatically on Windows, Linux and MacOS with python 3.8 - | ||
3.11 | ||
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The modbus protocol documentation is available | ||
`here <_static/Modbus_Application_Protocol_V1_1b3.pdf>` | ||
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We are constantly working the modernize pymodbus and add new features, | ||
and we look for people who want to help a bit. There are challenges | ||
small and large not only programming but also documentation and testing. | ||
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[![image](https://github.com/pymodbus-dev/pymodbus/actions/workflows/ci.yml/badge.svg?branch=dev)](https://github.com/pymodbus-dev/pymodbus/actions/workflows/ci.yml) | ||
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[![Documentation Status](https://readthedocs.org/projects/pymodbus/badge/?version=latest)](https://pymodbus.readthedocs.io/en/latest/?badge=latest) | ||
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[![Downloads](https://pepy.tech/badge/pymodbus)](https://pepy.tech/project/pymodbus) | ||
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## Supported versions | ||
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Version | ||
[3.5.3](https://github.com/pymodbus-dev/pymodbus/releases/tag/v3.5.3) is | ||
the current release. | ||
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Each release is | ||
[documented](https://pymodbus.readthedocs.io/en/latest/source/changelog.html) | ||
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A big thanks to all the | ||
[volunteers](https://pymodbus.readthedocs.io/en/latest/source/authors.html) | ||
that helped make pymodbus a great project. | ||
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::: important | ||
::: title | ||
Important | ||
::: | ||
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All API changes after 3.0.0 are documented in | ||
[API_changes.rst](https://github.com/pymodbus-dev/pymodbus/blob/dev/CHANGELOG.rst) | ||
::: | ||
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## Common features | ||
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> - Full modbus standard protocol implementation | ||
> - Support for custom function codes | ||
> - Most of the extended protocol | ||
> (diagnostic/file/pipe/setting/information) also implemented | ||
> - TCP, RTU-OVER-TCP, UDP, TLS, Serial ASCII and Serial RTU | ||
## Client Features | ||
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> - asynchronous and synchronous API for applications | ||
> - Payload builder/decoder utilities | ||
> - Pymodbus REPL for quick tests | ||
## Server Features | ||
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> - Simulate real life devices | ||
> - asynchronous and synchronous versions | ||
> - Full server control context (device information, counters, etc) | ||
> - A number of backend datastores | ||
> - Pymodbus REPL for quick tests | ||
> - Pymodbus simulator for cloud based testing | ||
## Use Cases | ||
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The client is the most typically used. It is embedded into applications, | ||
where it abstract the modbus protocol from the application by providing | ||
an easy to use API. The client is integrated into some well known | ||
projects like [home-assistant](https://www.home-assistant.io). | ||
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Although most system administrators will find little need for a Modbus | ||
server on any modern hardware, they may find the need to query devices | ||
on their network for status (PDU, PDR, UPS, etc). Since the library is | ||
written in python, it allows for easy scripting and/or integration into | ||
their existing solutions. | ||
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Continuing, most monitoring software needs to be stress tested against | ||
hundreds or even thousands of devices (why this was originally written), | ||
but getting access to that many is unwieldy at best. | ||
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The pymodbus server will allow a user to test as many devices as their | ||
base operating system will allow. | ||
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For more information please browse the project documentation: | ||
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<https://readthedocs.org/docs/pymodbus/en/latest/index.html> | ||
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## Example Code | ||
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For those of you that just want to get started fast, here you go: | ||
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from pymodbus.client import ModbusTcpClient | ||
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client = ModbusTcpClient('MyDevice.lan') | ||
client.connect() | ||
client.write_coil(1, True) | ||
result = client.read_coils(1,1) | ||
print(result.bits[0]) | ||
client.close() | ||
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We provide a couple of simple ready to go clients: | ||
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- [async | ||
client](https://github.com/pymodbus-dev/pymodbus/blob/dev/examples/simple_async_client.py) | ||
- [sync | ||
client](https://github.com/pymodbus-dev/pymodbus/blob/dev/examples/simple_sync_client.py) | ||
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For more advanced examples, check out the | ||
[Examples](https://pymodbus.readthedocs.io/en/dev/source/examples.html) | ||
included in the repository. If you have created any utilities that meet | ||
a specific need, feel free to submit them so others can benefit. | ||
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examples -> Essential examples guaranteed to work (tested with our CI) | ||
├── contrib -> Examples contributed by contributors. | ||
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Also, if you have a question, please [create a post in discussions q&a | ||
topic](https://github.com/pymodbus-dev/pymodbus/discussions/new?category=q-a), | ||
so that others can benefit from the results. | ||
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If you think, that something in the code is broken/not running well, | ||
please [open an | ||
issue](https://github.com/pymodbus-dev/pymodbus/issues/new), read the | ||
Template-text first and then post your issue with your setup | ||
information. | ||
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## Installing with pip | ||
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You can install using pip or easy install by issuing the following | ||
commands in a terminal window (make sure you have correct permissions or | ||
a virtualenv currently running): | ||
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> pip install -U pymodbus | ||
If you want to use the serial interface: | ||
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> pip install -U pymodbus\[serial\] | ||
This will install pymodbus, r | ||
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To install pymodbus with options run: | ||
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> pip install -U pymodbus\[\<option\>,\...\] | ||
Available options are: | ||
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- **repl**, install dependencies needed by pymodbus.repl | ||
- **serial**, installs serial drivers. | ||
- **simulator**, install dependencies needed by pymodbus.simulator | ||
- **documentation**, installs tools to generate documentation. | ||
- **development**, installs development tools needed to enable | ||
test/check of pymodbus changes. | ||
- **all**, installs all of the above | ||
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## Installing with github | ||
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Before cloning the repo, you need to install python3 (preferable 3.11) | ||
and make and activate a virtual environment: | ||
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python3 -m venv /path/to/new/virtual/environment | ||
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source .venv/bin/activate | ||
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Clone the source and install from there: | ||
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git clone git://github.com/pymodbus-dev/pymodbus.git | ||
cd pymodbus | ||
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To get a specific release: | ||
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git checkout v3.5.2 | ||
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To get bleeding edge: | ||
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git checkout dev | ||
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Install required development tools: | ||
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pip install -e ".[development]" | ||
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pre-commit install | ||
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This installs pymodbus in your virtual environment with pointers | ||
directly to the pymodbus directory, so any change you make is | ||
immediately available as if installed. It will also install | ||
[pre-commit]{.title-ref} git hooks. | ||
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The repository contains a number of important branches and tags. | ||
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: - **dev** is where all development happens, this branch is not | ||
always stable. | ||
- **master** is where are releases are kept. | ||
- All releases are tagged with **vX.Y.Z** (e.g. v2.5.3) | ||
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If a maintenance release of an old version is needed (e.g. v2.5.4), the | ||
release tag is used to create a branch with the same name, and | ||
maintenance development is merged here. | ||
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## Current Work In Progress | ||
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The maintenance team is very small with limited capacity and few modbus | ||
devices. | ||
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If your company would like your device tested or have a cloud based | ||
device simulation, feel free to contact us. We are happy to help your | ||
company solve your modbus challenges. | ||
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That said, the current work mainly involves polishing the library and | ||
solving issues: | ||
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> - Fixing bugs/feature requests | ||
> - Architecture documentation | ||
> - Functional testing against any reference we can find | ||
> - The remaining edges of the protocol (that we think no one uses) | ||
There are 2 bigger projects ongoing: | ||
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> - rewriting the internal part of all clients (both sync and async) | ||
> - Make the simulator datastore THE datastore | ||
## Development Instructions | ||
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The current code base is compatible python \>= 3.8. Here are some of the | ||
common commands to perform a range of activities | ||
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> ./check_ci.sh run the same checks as CI runs on a pull request. | ||
## Generate documentation | ||
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**Remark** Assumes that you have installed documentation tools: | ||
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> pip install -e \".\[documentation\]\" | ||
to build do: | ||
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> cd doc ./build_html | ||
The documentation is available in \<root\>/build/html/html | ||
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## Contributing | ||
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Just fork the repo and raise your PR against [dev]{.title-ref} branch. | ||
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We always have more work than time, so feel free to open a discussion / | ||
issue on a theme you want to solve. | ||
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## License Information | ||
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Released under the [BSD License](LICENSE) |
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