Device.Net, Does anyone have some experience using Device.Net?

[ty bender]

I have grabbed a sample code that they publish with the documentation, but I am confused at why I am getting errors in Visual Studio. I highlighted the lines i'm getting errors at. Please note I have not changed anything in the sample.

Code:

private static async Task checkHID()
        {
            var loggerFactory = LoggerFactory.Create((builder) =>
            {
                _ = builder.AddDebug().SetMinimumLevel(LogLevel.Trace);
            });

            //----------------------

            // This is Windows specific code. You can replace this with your platform of choice or put this part in the composition root of your app

            //Register the factory for creating Hid devices.
            var hidFactory =
                new FilterDeviceDefinition(vendorId: 0x534C, productId: 0x0001, label: "Trezor One Firmware 1.6.x", usagePage: 65280)
                .CreateWindowsHidDeviceFactory(loggerFactory);

            //Register the factory for creating Usb devices.
            var usbFactory =
                new FilterDeviceDefinition(vendorId: 0x1209, productId: 0x53C1, label: "Trezor One Firmware 1.7.x")
                .CreateWindowsUsbDeviceFactory(loggerFactory);

            //----------------------

            //Join the factories together so that it picks up either the Hid or USB device
            var factories = hidFactory.Aggregate(usbFactory);

            //Get connected device definitions
            var deviceDefinitions = (await factories.GetConnectedDeviceDefinitionsAsync().ConfigureAwait(false)).ToList();

            if (deviceDefinitions.Count == 0)
            {
                //No devices were found
                return;
            }

            //Get the device from its definition
            var trezorDevice = await hidFactory.GetDeviceAsync(deviceDefinitions.First()).ConfigureAwait(false);

            //Initialize the device
            await trezorDevice.InitializeAsync().ConfigureAwait(false);

            //Create the request buffer
            var buffer = new byte[65];
            buffer[0] = 0x00;
            buffer[1] = 0x3f;
            buffer[2] = 0x23;
            buffer[3] = 0x23;

            //Write and read the data to the device
            var readBuffer = await trezorDevice.WriteAndReadAsync(buffer).ConfigureAwait(false);
        }

Here are the errors,

 

[jmcilhinney]

That AddDebug is an extension method that you can get access to by adding the appropriate NuGet package.

DebugLoggerFactoryExtensions.AddDebug(ILoggingBuilder) Method (Microsoft.Extensions.Logging)

Adds a debug logger named 'Debug' to the factory.

docs.microsoft.com

Microsoft.Extensions.Logging 8.0.1

Logging infrastructure default implementation for Microsoft.Extensions.Logging.

www.nuget.org

 

[jmcilhinney]

CreateWindowsHidDeviceFactory is also an extension method and it can be found here:

Device.Net/src/Hid.Net/Windows/WindowsHidDeviceFactoryExtensions.cs at main · MelbourneDeveloper/Device.Net

A C# cross platform connected device framework. Contribute to MelbourneDeveloper/Device.Net development by creating an account on GitHub.

github.com

Have you referenced the appropriate assembly, either directly or via NuGet, and imported the appropriate namespace?

Likewise, the CreateWindowsUsbDeviceFactory method can be found here:

Device.Net/src/Usb.Net/Windows/WindowsUsbDeviceFactoryExtensions.cs at main · MelbourneDeveloper/Device.Net

A C# cross platform connected device framework. Contribute to MelbourneDeveloper/Device.Net development by creating an account on GitHub.

github.com

 

[jmcilhinney]

With regards to the error on this line:

if (deviceDefinitions.Count == 0)

the only explanation that comes to mind is that you have not imported System.Collections.Generic and that Count is being interpreted as the IEnumerable<T>.Count extension method rather than the List<T>.Count property. If that is the case then you can either import the namespace or add parentheses to call the method.