Componentpedia / Listings / tokio-modbus

Last update: 13/05/2026

tokio-modbus

A tokio-based modbus library

Latest version: 0.17.0 registry icon
Maintenance score
73
Safety score
100
Popularity score
82
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Security
  Vulnerabilities
Version Suggest Low Medium High Critical
0.17.0 0 0 0 0 0
0.16.5 0 0 0 0 0
0.16.4 0 0 0 0 0
0.16.3 0 0 0 0 0
0.16.2 0 0 0 0 0
0.16.1 0 0 0 0 0
0.16.0 0 0 0 0 0
0.15.0 0 0 0 0 0
0.14.1 0 0 0 0 0
0.14.0 0 0 0 0 0
0.13.1 0 0 0 0 0
0.13.0 0 0 0 0 0
0.12.0 0 0 0 0 0
0.11.0 0 0 0 0 0
0.10.0 0 0 0 0 0
0.9.0 0 0 0 0 0
0.8.2 0 0 0 0 0
0.8.1 0 0 0 0 0
0.8.0 0 0 0 0 0
0.7.1 0 0 0 0 0
0.7.0 0 0 0 0 0
0.6.1 0 0 0 0 0
0.6.0 0 0 0 0 0
0.5.4 0 0 0 0 0
0.5.3 0 0 0 0 0
0.5.2 0 0 0 0 0
0.5.1 0 0 0 0 0
0.5.0 0 0 0 0 0
0.4.2 0 0 0 0 0
0.4.1 0 0 0 0 0
0.4.0 0 0 0 0 0
0.3.5 0 0 0 0 0
0.3.4 0 0 0 0 0
0.3.3 0 0 0 0 0
0.3.2 0 0 0 0 0
0.3.1 0 0 0 0 0
0.3.0 0 0 0 0 0
0.2.3 0 0 0 0 0
0.2.2 0 0 0 0 0
0.2.1 0 0 0 0 0
0.2.0 0 0 0 0 0
0.1.0 0 0 0 0 0
0.0.0 0 0 0 0 0

Stability
Latest release:

0.17.0 - This version is safe to use because it has no known security vulnerabilities at this time. Find out if your coding project uses this component and get notified of any reported security vulnerabilities with Meterian-X Open Source Security Platform

Licensing

Maintain your licence declarations and avoid unwanted licences to protect your IP the way you intended.

MIT   -   MIT License

Not a wildcard

Not proprietary

OSI Compliant

Apache-2.0   -   Apache License 2.0

Not a wildcard

Not proprietary

OSI Compliant

tokio-modbus

A pure Rust Modbus library based on tokio.

Crates.io Docs.rs Security audit Continuous integration MIT licensed Apache 2.0 licensed

Modbus is based on a master/slave communication pattern. To avoid confusion with the Tokio terminology the master is called client and the slave is called server in this library.

Features

  • Pure Rust library
  • Modbus TCP or RTU at your choice
  • Both async (non-blocking, default) and sync (blocking, optional)
  • Client API
  • Server implementations
    • for out-of-the-box usage or
    • as a starting point for a customized implementation
  • Open source (MIT/Apache-2.0)

Installation

Add this to your Cargo.toml:

[dependencies]
tokio-modbus = "*"

Cargo Features

  • "rtu": Asynchronous RTU client (default)
  • "tcp": Asynchronous TCP client (default)
  • "rtu-sync: Synchronous RTU client
  • "tcp-sync": Synchronous TCP client
  • "rtu-server": (Asynchronous) RTU server
  • "tcp-server": (Asynchronous) TCP server
  • "rtu-over-tcp-server": (Asynchronous) RTU over TCP server

Examples

If you only need an asynchronous TCP client add the following line to your Cargo.toml file:

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

For an asynchronous RTU client:

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

For an RTU server:

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

For 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.

Testing

The workspace contains documentation, tests, and examples for all available features.

cargo test --workspace
cargo test --workspace --all-features

Protocol-Specification

License

Copyright (c) 2017-2026 slowtec GmbH

MIT/Apache-2.0