This is a plugin that supports sending commands to USB devices on Windows (with WIA Api) and Android. It's a really early test project without any released versions yet.
Until release on pub.dev (where i think you should not release windows plugins yet)
you need to edit your pubspec.yaml and add:
flutterusb: git: https://github.com/Nailik/flutter_usb.git
and to use:
import 'package:flutterusb/flutter_usb.dart';
this enables to log send and received commands as hex
FlutterUsb.enableLogger();
this is necessary on windows to initialize wia
FlutterUsb.initializeUsb;
this returns the found devices
FlutterUsb.getUsbDevices;
on android connect will prompt user to allow connection
endpoints for command are set here and at the moment it's hardcoded
FlutterUsb.connectToUsbDevice(device);
send command will send the given array and return a Response
FlutterUsb.sendCommand(Command([0x02, 0x02]));
NOTE: When it crashes on windows you may need to disconnect and reconnect USB Device. If it still doesn't work only rebooting will help because the WIA Api crashed.