flutter_android_usb_bulk_transfer

A Flutter plugin for Android USB bulk transfer. It allows communicating with USB devices using bulk endpoints.

Features

  • List connected USB devices.
  • Connect to a USB device by Vendor ID and Product ID.
  • Write raw bytes to a USB device.
  • Read bytes from a USB device.
  • Check connection status and disconnect.
  • Platform Safety: Does nothing on non-Android platforms instead of failing.

Usage

List USB Devices

final plugin = FlutterAndroidUsbBulkTransfer();
List<Map<String, dynamic>> devices = await plugin.listUsbDevices();
for (var device in devices) {
  print('Device: ${device['deviceName']}, VID: ${device['vendorId']}, PID: ${device['productId']}');
}

Connect to a USB Device

// Connect using specific VID and PID
await plugin.connect(vid: 1234, pid: 5678);

Write Data

final data = Uint8List.fromList([0x01, 0x02, 0x03, 0x04]);
await plugin.write(data);

Read Data

final response = await plugin.read(64); // Read 64 bytes
if (response != null) {
  print('Received: $response');
}

Check Connection and Disconnect

bool connected = await plugin.isConnected();
if (connected) {
  await plugin.disconnect();
}

Bonus: POS/ESC Printer Support

This plugin includes specialized functionality for POS/ESC printers.

Print PDF Page

Renders a PDF page into a bitmap and converts it to ESC/POS image commands.

await plugin.writePdf('/path/to/your/document.pdf');

Android Setup

Ensure your AndroidManifest.xml includes the USB host feature. The plugin handles runtime permission requests.

<uses-feature android:name="android.hardware.usb.host" />

License

Apache 2.0

Libraries

flutter_android_usb_bulk_transfer