Detecting wireless Buzz! buzzers with Unity engine

unity-detect-wireless-buzzer.cs

using System;
using System.Collections.Generic;
using HidSharp; // https://www.nuget.org/packages/HidSharp/
using UnityEngine;

namespace Goldsaucer.Askutron.HardwareInput
{
    public class WirelessBuzzBuzzers : MonoBehaviour
    {
        class ConnectedReceiver
        {
            public DeviceStream stream;
        }

        private readonly List<ConnectedReceiver> _connected = new List<ConnectedReceiver>();

        private void Start()
        {
            if (!Application.isEditor)
            {
                Detect();
            }
            else
            {
                // do not detect buzzers every time because this crashes the editor
                // due to some bug in the HID library
                // Use the reset function of this component to explicitly detect
                // buzzers once. 
            }
        }

        private void Reset()
        {
            Detect();
        }

        public void Detect()
        {
            foreach (var dev in DeviceList.Local.GetAllDevices())
            {
                Debug.Log("Found device: " + dev.GetFriendlyName());

                if (dev.GetFriendlyName().ToLower().Contains("wbuzz"))
                {
                    ConnectBuzzer(dev);
                }
                else if (dev.GetFriendlyName().ToLower().Contains("buzz"))
                {
                    Debug.Log($"Found potential buzzer ${dev.GetFriendlyName()}");
                }
            }
        }

        private void ConnectBuzzer(Device device)
        {
            DeviceStream stream;
            
            if (device.TryOpen(out stream))
            {
                stream.Write(new byte[] { 0x0 }, 0, 1);
                _connected.Add(new ConnectedReceiver() {stream = stream});
                Debug.Log("Connected " + device.GetFriendlyName());
            }
            else
            {
                Debug.Log("Could not connect " + device.GetFriendlyName());
            }
        }

        private void OnDestroy()
        {
            foreach (var receiver in _connected)
            {
                receiver.stream.Dispose();
            }
        }
    }
}

Still valid and working. Just rip out the code for listing the devices and the ConnectBuzzer-call into a small little console app, and that little flag being sent, makes the dongle work (talk with the controllers). Meaning you can see the buttons being pressed in the game controllers properties in windows. And once this works - the buzzers now being a valid controller on the system - they can then be mapped to virtual buzzes in misc PS emulators if they dont work without being mapped.