Enum tokio_modbus::prelude::Request

pub enum Request {
    ReadCoils(u16, u16),
    ReadDiscreteInputs(u16, u16),
    WriteSingleCoil(u16, bool),
    WriteMultipleCoils(u16, Vec<bool>),
    ReadInputRegisters(u16, u16),
    ReadHoldingRegisters(u16, u16),
    WriteSingleRegister(u16, u16),
    WriteMultipleRegisters(u16, Vec<u16>),
    ReadWriteMultipleRegisters(u16, u16, u16, Vec<u16>),
    Custom(u8, Vec<u8>),
    Disconnect,
}

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

Variants

ReadCoils(u16, u16)

Tuple Fields

0: u16

1: u16

A request to read multiple coils. The first parameter is the address of the first coil to read. The second parameter is the number of coils to read.

ReadDiscreteInputs(u16, u16)

Tuple Fields

0: u16

1: u16

A request to read multiple discrete inputs The first parameter is the address of the first discrete input to read. The second parameter is the number of discrete inputs to read.

WriteSingleCoil(u16, bool)

Tuple Fields

0: u16

1: bool

A request to write a single coil. The first parameter is the address of the coil. The second parameter is the value to write to the coil.

WriteMultipleCoils(u16, Vec<bool>)

Tuple Fields

0: u16

1: Vec<bool>

A request to write multiple coils. The first parameter is the address of the first coil to write. The second parameter is the vector of values to write to the coils.

ReadInputRegisters(u16, u16)

Tuple Fields

0: u16

1: u16

A request to read multiple input registers. The first parameter is the address of the first input register to read. The second parameter is the number of input registers to read.

ReadHoldingRegisters(u16, u16)

Tuple Fields

0: u16

1: u16

A request to read multiple holding registers. The first parameter is the address of the first holding register to read. The second parameter is the number of holding registers to read.

WriteSingleRegister(u16, u16)

Tuple Fields

0: u16

1: u16

A request to write a single register. The first parameter is the address of the register to read. The second parameter is the value to write to the register.

WriteMultipleRegisters(u16, Vec<u16>)

Tuple Fields

0: u16

1: Vec<u16>

A request to write to multiple registers. The first parameter is the address of the first register to write. The second parameter is the vector of values to write to the registers.

ReadWriteMultipleRegisters(u16, u16, u16, Vec<u16>)

Tuple Fields

0: u16

1: u16

2: u16

3: Vec<u16>

A request to simultaneously read multiple registers and write multiple registers. The first parameter is the address of the first register to read. The second parameter is the number of registers to read. The third parameter is the address of the first register to write. The fourth parameter is the vector of values to write to the registers.

Custom(u8, Vec<u8>)

Tuple Fields

0: u8

1: Vec<u8>

A raw Modbus request. The first parameter is the Modbus function code. The second parameter is the raw bytes of the request.

Disconnect

A poison pill for stopping the client service and to release the underlying transport, e.g. for disconnecting from an exclusively used serial port.

This is an ugly workaround, because tokio-proto does not provide other means to gracefully shut down the ClientService. Otherwise the bound transport is never freed as long as the executor is active, even when dropping the Modbus client context.

Trait Implementations

impl Clone for Request

fn clone(&self) -> Request

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Request

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<Request> for Bytes

fn from(req: Request) -> Bytes

Performs the conversion.

impl PartialEq<Request> for Request

fn eq(&self, other: &Request) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Request) -> bool

This method tests for !=.

impl TryFrom<Bytes> for Request

type Error = Error

The type returned in the event of a conversion error.

fn try_from(bytes: Bytes) -> Result<Self, Self::Error>

Performs the conversion.

impl Eq for Request

impl StructuralEq for Request

impl StructuralPartialEq for Request