Crate modbus_core

modbus-core

A no-std Rust modbus library.

Installation

Add this to your Cargo.toml:

[dependencies]
modbus-core = "*"

If you like to use Modbus TCP only:

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

If you like to use Modbus RTU only:

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

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 2018-2024 slowtec GmbH

MIT/Apache-2.0

Modules

rtu

Modbus RTU

tcp

Modbus RTU

Structs

Coils

Packed coils

CoilsIter

Coils iterator.

Data

Modbus data (u16 values)

DataIter

Data iterator

ExceptionResponse

A server (slave) exception response.

RequestPdu

Represents a message from the client (slave) to the server (master).

ResponsePdu

Represents a message from the server (slave) to the client (master).

Enums

DecoderType

The type of decoding

Error

modbus-core Error

Exception

A server (slave) exception.

FunctionCode

A Modbus function code.

Request

A request represents a message from the client (master) to the server (slave).

Response

The response data of a successfull request.

Traits

Encode

Encode a struct into a buffer.

Functions

bool_to_u16_coil

Turn a bool into a u16 coil value

pack_coils

Pack coils into a byte array.

packed_coils_len

Calculate the number of bytes required for a given number of coils.

u16_coil_to_bool

Turn a u16 coil value into a boolean value.

unpack_coils

Unpack coils from a byte array.