Function requestSerialPort

requestSerialPort(): Effect<WasmSerialPortHandle, ModbusError>
Requests a browser serial port handle via the Web Serial API, for use with WasmSerialTransportService.fromRtu / .fromAscii (or WasmRtuTransportService.Default / WasmAsciiTransportService.Default directly).

Must be called synchronously from within a user-gesture event handler (e.g. a click listener) — this is a hard Web Serial API / browser security constraint (navigator.serial.requestPort() semantics), not a library-imposed restriction. Calling it outside a gesture will reject.

Returns Effect<WasmSerialPortHandle, ModbusError>
Example
```
button.addEventListener("click", () => {
  Effect.runPromise(
    requestSerialPort().pipe(
      Effect.flatMap((port) => Effect.provide(program, WasmRtuTransportService.Default({ port, baudRate: 19200 }))),
    ),
  );
});
```
See
WasmSerialPortHandle — Opaque handle returned by modbus-rs's WASM bindings.
- Defined in src/WasmSerialPort.ts:30