Struct Request

pub struct Request<'a> { /* private fields */ }

Implementations

impl<'a> Request<'a>

pub fn new(modbus_id: u8, form: &'a RequestForm<'_>) -> Request<'a>

Creates a new Modbus RTU request instance.

---

Arguments

• modbus_id: The Modbus slave ID
• form: A reference to the request form

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Returns

A new instance of Request containing the specified Modbus ID and form

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Examples

use modbus_rtu::common::{Request, RequestForm};
 
let read_value_form = RequestForm::ReadInputRegisters {
    start_register: 0x0000,
    registers_count: 12,
};
 
let request = Request::new(0x01, &read_value_form);

pub fn to_packet(&self, buffer: &'a mut [u8; 256]) -> &'a [u8]

Writes a Modbus RTU request packet into the provided buffer and returns the corresponding slice.

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Arguments

• buffer: The buffer into which the packet will be written

---

Returns

A slice representing the constructed Modbus RTU request packet

---

Examples

use modbus_rtu::common::{Request, RequestForm};

let write_datas_form = RequestForm::WriteMultipleRegisters {
    start_register: 0x0001,
    datas_to_write: &[0x1234, 0x5678],
};

let request = Request::new(0x01, &write_datas_form);

let mut buffer: [u8; 256] = [0; 256];
let packet = request.to_packet(&mut buffer);

assert_eq!(packet, &[0x01, 0x10, 0x00, 0x01, 0x00, 0x02, 0x04, 0x12, 0x34, 0x56, 0x78, 0x49, 0x57]);

Trait Implementations

impl<'a> Debug for Request<'a>

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

Formats the value using the given formatter.