Function write_data_terminal_ready 

pub fn write_data_terminal_ready<R: Runtime>(
    _app: AppHandle<R>,
    serial: State<'_, SerialPort<R>>,
    path: String,
    level: bool,
) -> Result<(), Error>

Sets the DTR (Data Terminal Ready) control signal

Controls the DTR signal line on the serial port. This signal indicates that the terminal (computer) is ready for communication.

Arguments

• _app - The Tauri app handle
• serial - The serial port state
• path - The path to the serial port (e.g., “COM1”, “/dev/ttyUSB0”)
• level - The signal level (true for high, false for low)

Returns

Ok(()) if the DTR signal was set successfully, or an Error if it failed.

Example

use tauri_plugin_serialplugin::commands::write_data_terminal_ready;
use tauri::{AppHandle, State};
 
#[tauri::command]
async fn control_dtr(
    app: AppHandle<tauri::Wry>,
    serial: State<'_, tauri_plugin_serialplugin::desktop_api::SerialPort<tauri::Wry>>
) -> Result<(), String> {
    write_data_terminal_ready(app, serial, "COM1".to_string(), true)
        .map_err(|e| e.to_string())
}

JavaScript Equivalent

import { SerialPort } from "tauri-plugin-serialplugin-api";;
 
const port = new SerialPort({ path: "COM1" });
await port.open();
await port.writeDataTerminalReady(true);