2 stable releases
1.0.1 | Nov 5, 2020 |
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#17 in #modbus
350KB
7K
SLoC
libmodbus
This crate was renamed to just libmodbus. Before version 1.0.0 the name of the crate was libmodbus-rs.
libmodbus bindings for Rust
Libmodbus is a free software library to send and receive data with a device that respects the Modbus protocol. That crate contains the Rust bindings for the libmodbus library (written in C). Like libmodbus self, this crate supports serial port and Ethernet connections for Modbus server and clients.
Homepage | Documentation | Original libmodbus documentation | Github repo |
This crate based on the latest libmodbus git:master branch. I plan to support the different libmodbus version via cargo's feature
feature.
Usage
Include the dependencies into your Cargo.toml
file.
for stable (crates.io)
[dependencies]
libmodbus-rs = "1"
or development (github master)
[dependencies]
libmodbus-rs = { git = "https://github.com/zzeroo/libmodbus-rs.git" }
Some header files of the original libmodbus C library are recreated as traits (e.g. ModbusTCP, ModbusRTU, ModbusServer, ModbusClient, ...). For example if you what to build an modbus server, in the modbus tcp context, include the following:
extern crate libmodbus_rs;
use libmodbus::{Modbus, ModbusServer, ModbusTCP};
The examples in the examples directory show this.
Documentation
Building libmodbus-rs
The libmodbus ffi bindings (libmodbus-sys) are build using bindgen. Bindgen need Clang 3.9 or greater on your system.
Dependencies Archlinux
pacman -S autoconf clang39 git libtool make
Dependencies Debian based (e.g. Ubuntu)
apt install autoconf build-essential curl clang git-core libtool
Look also at the local ci/ docker files under ./ci/docker-archlinux
and .ci/docker-debian9
for a known working, minimal setup.
For more information about the bindgen requirements please visit https://servo.github.io/rust-bindgen/requirements.html
Dependencies Windows
Follow the msys2 instructions https://www.msys2.org
pacman -Syu
Followed by the second update step
pacman -Su
Finally install clang
pacman -S mingw64/mingw-w64-x86_64-clang
If all dependencies are solved, compile with cargo build
and/ or run the tests with cargo test
.
git clone https://github.com/zzeroo/libmodbus-rs
cd libmodbus-rs
cargo build
Examples
Most of the original libmodbus examples are reproduced in Rust.
You can found them in the examples
directory of this crate.
Please have look at the README.md in the examples directory for more information about the examples.
To start, for example, the random test server/ client use the following commands
cargo run --example random-test-server
In another shell start the client after the server
cargo run --example random-test-client
License
libmodbus-rs
is distributed under the terms of the LGPL-2.1 license, which is the same license, libmodbus is using.
Links
- http://libmodbus.org
- https://github.com/stephane/libmodbus.git
- https://github.com/servo/rust-bindgen
- https://doc.rust-lang.org/book/ffi.html
This project hosts the original libmodbus documentation, used here, as well. Please have a look at http://zzeroo.github.io/libmodbus-rs/libmodbus/libmodbus.html.
Dependencies
~2.4–4.5MB
~98K SLoC