tokio-modbus

A tokio-based modbus library.

Features

• pure Rust library
• async (non-blocking)
• sync (blocking)
• Modbus TCP
• Modbus RTU
• Client & Server
• Open Source (MIT/Apache-2.0)

Installation

Add this to your Cargo.toml:

[dependencies]
tokio-modbus = "*"

If you like to use Modbus TCP only:

[dependencies]
tokio-modbus = { version = "*", default-features = false, features = ["tcp"] }

If you like to use Modbus RTU only:

[dependencies]
tokio-modbus = { version = "*", default-features = false, features = ["rtu"] }

If you like to build a TCP server:

[dependencies]
tokio-modbus = { version = "*", default-features = false, features = ["tcp", "server"] }

Examples

Various examples for Modbus RTU and TCP using either the asynchronous or synchronous API can be found in the examples folder.

Protocol-Specification

• MODBUS Application Protocol Specification v1.1b3 (PDF)
• MODBUS over serial line specification and implementation guide v1.02 (PDF)
• MODBUS Messaging on TCP/IP Implementation Guide v1.0b (PDF)

License

Copyright 2017 - 2020 slowtec GmbH

MIT/Apache-2.0