USB communication via HID device

Question

Hi, I am trying to create a cross-platform app with .net maui. The purpose of the app is to be able to communicate with a USB device (HID) by sending and receiving raw data. After much research I managed to find the library ‘hidlibrary’ which works perfectly on Windows form, however on .net maui at the first instruction to receive data it gives me the exception ‘Operation not supported on this platform’. How can I solve this? Am I taking the wrong approach? Thanks in advance

Answer

Good day,

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Answer

Buongiorno, Simone,

il seguente potrebbe aiutare:

Activity act = Platform.CurrentActivity;
UsbManager manager = (UsbManager)act.GetSystemService(Context.UsbService);
IDictionary devicesDictionary = manager.DeviceList;
UsbDevice dvc = devicesDictionary.ElementAt(0).Value;
string ACTION_USB_PERMISSION = "rzepak";
var interf = dvc.GetInterface(1);
outEndpoint = interf.GetEndpoint(1);
PendingIntent mPermissionIntent = PendingIntent.GetBroadcast(act, 0, new Intent(ACTION_USB_PERMISSION), 0);
IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
if (manager.HasPermission(dvc) == false)
   manager.RequestPermission(dvc, mPermissionIntent);
deviceConnection = manager.OpenDevice(dvc);
if (deviceConnection != null)
    deviceConnection.ClaimInterface(interf, true).ToString();
    else return false;

deviceConnection e' un tipo Android.Hardware.Usb.UsbDeviceConnection aperto in modalita' di conessione:

byte[] test = new byte[] { input };
if (deviceConnection.BulkTransfer(outEndpoint, test, test.Length, 500) < 0)
    Connected = false;

c'e' sempre la pagina iniziale, con tutta l'informazione disponibile da Microsoft:

https://dotnet.microsoft.com/en-us/apps/maui

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USB communication via HID device

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