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

• 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.

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.