Failed to execute 'open' on 'USBDevice': Access denied.

[vickyponraj]

Throws

RethrownDartError: SecurityError: Failed to execute 'open' on 'USBDevice': Access denied.
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 329:10 createErrorWithStack
dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 265:28 _throw
dart-sdk/lib/core/errors.dart 120:5 throwWithStackTrace
dart-sdk/lib/async/zone.dart 1386:11 callback
dart-sdk/lib/async/schedule_microtask.dart 40:11 _microtaskLoop
dart-sdk/lib/async/schedule_microtask.dart 49:5 _startMicrotaskLoop
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 181:7

class _MyHomePageState extends State<MyHomePage> {
  final UsbDevice usbDevice = UsbDevice();

  void _incrementCounter() async {
    const int vendorId = 0x4B43; // '4B43' in hexadecimal
    const int productId = 0x3830; // '3830' in hexadecimal

    final pairedDevice = await usbDevice.requestDevices(
        [DeviceFilter(vendorId: vendorId, productId: productId)]);

// get device's info
    USBDeviceInfo deviceInfo =
        await usbDevice.getPairedDeviceInfo(pairedDevice);


    debugPrint('usbVersionMajor - ${deviceInfo.usbVersionMajor}');
    debugPrint('usbVersionMinor - ${deviceInfo.usbVersionMinor}');
    debugPrint('usbVersionSubMinor - ${deviceInfo.usbVersionSubMinor}');
    debugPrint('deviceClass - ${deviceInfo.deviceClass}');
    debugPrint('deviceSubClass - ${deviceInfo.deviceSubClass}');
    debugPrint('deviceProtocol - ${deviceInfo.deviceProtocol}');
    debugPrint('vendorId - ${deviceInfo.vendorId}');
    debugPrint('productId - ${deviceInfo.productId}');
    debugPrint('deviceVersionMajor - ${deviceInfo.deviceVersionMajor}');
    debugPrint('deviceVersionMinor - ${deviceInfo.deviceVersionMinor}');
    debugPrint('deviceVersionSubMinor - ${deviceInfo.deviceVersionSubMinor}');
    debugPrint('manufacturerName - ${deviceInfo.manufacturerName}');
    debugPrint('productName - ${deviceInfo.productName}');
    debugPrint('serialNumber - ${deviceInfo.serialNumber}');
    debugPrint('opened - ${deviceInfo.opened}');

// start session
    await usbDevice.open(pairedDevice);

// close session
    await usbDevice.close(pairedDevice);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ),
    );
  }
}

OUTPUT

usbVersionMajor - 1
usbVersionMinor - 1
usbVersionSubMinor - 0
deviceClass - 0
deviceSubClass - 0
deviceProtocol - 0
vendorId - 19267
productId - 14384
deviceVersionMajor - 0
deviceVersionMinor - 0
deviceVersionSubMinor - 0
manufacturerName - Caysn
productName - Thermal Printer
serialNumber - 4B48325338FFFF1400035068
opened - false
RethrownDartError: SecurityError: Failed to execute 'open' on 'USBDevice': Access denied.

dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 329:10 createErrorWithStack
dart-sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart 265:28 _throw
dart-sdk/lib/core/errors.dart 120:5 throwWithStackTrace
dart-sdk/lib/async/zone.dart 1386:11 callback
dart-sdk/lib/async/schedule_microtask.dart 40:11 _microtaskLoop
dart-sdk/lib/async/schedule_microtask.dart 49:5 _startMicrotaskLoop
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 181:7