Function read 

pub fn read<R: Runtime>(
    _app: AppHandle<R>,
    serial: State<'_, SerialPort<R>>,
    path: String,
    timeout: Option<u64>,
    size: Option<usize>,
) -> Result<String, Error>

Reads string data from a serial port

Reads data from the serial port and returns it as a string. The port must be open before reading data.

Arguments

• _app - The Tauri app handle
• serial - The serial port state
• path - The path to the serial port (e.g., “COM1”, “/dev/ttyUSB0”)
• timeout - Read timeout in milliseconds (None for no timeout)
• size - Maximum number of bytes to read (None for unlimited)

Returns

The string data read from the port, or an Error if the operation failed.

Example

use tauri_plugin_serialplugin::commands::read;
use tauri::{AppHandle, State};
 
#[tauri::command]
async fn receive_data(
    app: AppHandle<tauri::Wry>,
    serial: State<'_, tauri_plugin_serialplugin::desktop_api::SerialPort<tauri::Wry>>
) -> Result<(), String> {
    let data = read(app, serial, "COM1".to_string(), Some(1000), Some(1024))
        .map_err(|e| e.to_string())?;
    println!("Received: {}", data);
    Ok(())
}

JavaScript Equivalent

import { SerialPort } from "tauri-plugin-serialplugin-api";;
 
const port = new SerialPort({ path: "COM1" });
await port.open();
const data = await port.read({ timeout: 1000, size: 1024 });
console.log("Received:", data);