Feature Request: Native Gamepad layout for 8BitDo Ultimate 2 Wireless Controller (VID 0x2DC8, PID 0x6012)

[GatorDawg100]

Summary

The 8BitDo Ultimate 2 Wireless Controller is a popular third-party gamepad that supports both 2.4GHz USB Dongle and direct Bluetooth wireless connectivity.

On macOS (and other platforms), when connected in D-Input / Wireless mode (Vendor ID: 0x2DC8, Product ID: 0x6012), Unity's New Input System (com.unity.inputsystem) treats the device as an unconfigured generic InputDevice rather than instantiating a Gamepad instance.

Because games relying on Gamepad.current or Gamepad.all (such as Valheim) strictly query devices typed as Gamepad, this controller is completely unrecognized in-game unless users switch to Nintendo Switch mode (which sacrifices analog triggers and turns them into digital buttons).

Device Information

• Manufacturer: 8BitDo
• Product Name: 8BitDo Ultimate 2 Wireless
• Vendor ID: 0x2DC8 (11720)
• Product ID: 0x6012 (24594)
• Interface: HID (USB 2.4GHz adapter and macOS Bluetooth HID)
• Report ID: 0x01 (34 bytes input report)

Verified HID Input Report Layout (Report ID 1 - 34 bytes)

We have reverse-engineered, tested, and verified the exact packet layout:

• Offset 0: Report ID (0x01)
• Offset 1: D-Pad Hat Switch (0=Up, 1=UpRight, 2=Right, 3=DownRight, 4=Down, 5=DownLeft, 6=Left, 7=UpLeft, 15=Neutral)
• Offset 2: Left Stick X (0..255, center 128)
• Offset 3: Left Stick Y (0..255, center 128, inverted)
• Offset 4: Right Stick X (0..255, center 128)
• Offset 5: Right Stick Y (0..255, center 128, inverted)
• Offset 6: Face buttons & Bumpers (bitmask):
  • Bit 0: South (A)
  • Bit 1: East (B)
  • Bit 3: West (X)
  • Bit 4: North (Y)
  • Bit 6: Left Shoulder (LB)
  • Bit 7: Right Shoulder (RB)
• Offset 7: System & Thumbstick Clicks (bitmask):
  • Bit 2: Select / Back
  • Bit 3: Start
  • Bit 4: Home / Guide
  • Bit 5: Left Stick Click (L3)
  • Bit 6: Right Stick Click (R3)
• Offset 8: Left Trigger Analog (0..255, continuous continuous travel)
• Offset 9: Right Trigger Analog (0..255, continuous continuous travel)
• Offset 10: Back Paddles:
  • Bit 0: Paddle M1 (Grip)
  • Bit 1: Paddle M2 (Grip)

Proposed Implementation

Adding a layout definition such as:

InputSystem.RegisterLayout<EightBitDoUltimate2Gamepad>(
    "8BitDoUltimate2Wireless",
    matches: new InputDeviceMatcher()
        .WithInterface("HID")
        .WithCapability("vendorId", 0x2dc8)
        .WithCapability("productId", 0x6012)
);

InputSystem.RegisterLayoutMatcher(
    "8BitDoUltimate2Wireless",
    new InputDeviceMatcher()
        .WithProduct("8BitDo Ultimate 2 Wireless")
);

We have confirmed this layout works with 100% fidelity, zero latency, and full analog trigger sensitivity in Unity runtime.

Adding this built-in layout to com.unity.inputsystem will allow all Unity games on macOS (and other desktop platforms) to support this controller natively without requiring custom mods or workarounds.