Build a Bluetooth-to-N64 Controller Adapter

What Is This?

BT2N64 lets you use any Bluetooth controller — PS5, Xbox, Switch Pro, 8BitDo, you name it — on a real N64 console. Pair a wireless controller, plug the adapter into a controller port, and play N64 games without wires.

Why would you want this?

• Wireless controllers on N64 — no more tripping over controller cables
• Modern ergonomics — use a DualSense or Xbox controller instead of the N64's famously unusual trident
• Rumble support — the adapter emulates a Rumble Pak, so vibration gets forwarded to your Bluetooth controller
• 3 button profiles — Default, FPS (GoldenEye/Perfect Dark), and Mario (Super Mario 64)
• Works from cold boot — power on the N64 and the adapter is ready immediately

This build requires only 3 solder connections — it's one of the simpler console adapter builds.

Supported Controllers

The Pico W supports both Classic Bluetooth and BLE, giving you the widest controller compatibility:

Parts List

Total: ~$20–30 (less if you already have tools and wire).

Pico 2 W alternative: $7 instead of $6, USB-C instead of Micro-USB, same Bluetooth support, same wiring.

Step 1: Prepare the N64 Cable

Cut one end off an N64 controller extension cable. You want the male end (the plug that goes into the N64 console's controller port). Strip about 5mm of insulation from the wires inside.

N64 Controller Port Pinout

Looking at the front of the console's controller port:

  ___________
 / 1   2   3 \
|  4   5   6  |
 \___________/

Pin 1: GND
Pin 2: Data
Pin 3: 3.3V
Pin 4: N/C (not connected)
Pin 5: N/C (not connected)
Pin 6: GND

You only need 3 connections: Data, 3.3V, and GND.

Use a multimeter to verify which wire goes to which pin — N64 cables aren't always color-coded consistently.

Step 2: Wire It Up

Pico W → N64 Console

That's it. Three wires.

Important Notes

• GPIO 2 is the data pin — this is hardcoded in the firmware
• 3V3 (OUT) provides 3.3V from the Pico W's onboard regulator. The N64 controller port also provides 3.3V, but we're using the Pico's supply since the adapter is the "controller" in this case
• The N64 uses a single-wire joybus protocol at 3.3V logic levels — no level shifting needed with the Pico W
• The adapter gets its own power from the N64's controller port (3.3V on Pin 3 powers the Pico through 3V3), or you can power it separately via USB if preferred

Power note: The Pico W needs power to run. In a typical setup, the N64's 3.3V on Pin 3 provides this through the Pico's 3V3 pin. If you prefer, you can also power the Pico via a USB power bank connected to its Micro-USB port — useful for keeping the adapter accessible for firmware updates.

Step 3: Flash the Firmware

Download the UF2

Go to github.com/joypad-ai/joypad-os/releases and download:

Enter Bootloader Mode

1. Disconnect the Pico W from everything
2. Hold the BOOTSEL button (small white button on the board)
3. While holding BOOTSEL, plug the Micro-USB cable into your computer
4. Release BOOTSEL
5. A drive named RPI-RP2 (Pico W) or RP2350 (Pico 2 W) appears

Flash

1. Drag and drop the .uf2 file onto the drive
2. Drive auto-ejects — firmware is flashed
3. The Pico W reboots and is ready to pair

Step 4: Pair Your Controller

1. Connect the adapter to the N64 controller port
2. Power on the N64 — the adapter starts automatically
3. Check the onboard LED to see what state you're in:

4. Put your controller into pairing mode:
   • PS5: Hold Share + PS button until light bar flashes rapidly
   • PS4: Hold Share + PS button until light bar flashes
   • Xbox: Hold the small pair button on top until the Xbox button flashes
   • Switch Pro: Hold the sync button on top of the controller
5. The adapter automatically scans on boot — your controller should connect within a few seconds
6. Once paired, the controller reconnects automatically every time

Managing Pairings

• Click BOOTSEL — starts a 60-second scan for new controllers
• Hold BOOTSEL — disconnects all controllers and clears all saved pairings (start fresh)

Step 5: Play!

Once the LED is solid, you're connected. Start a game and play!

Button Mapping Profiles

BT2N64 has 3 profiles optimized for different game types. To switch:

1. Hold Select for 2 seconds
2. Press D-Pad Up/Down to cycle
3. Controller rumbles to confirm

Default Profile

General-purpose mapping with right stick → C-buttons:

FPS Profile

Optimized for GoldenEye 007, Perfect Dark, and other N64 shooters:

Mario Profile

Optimized for Super Mario 64 and platformers:

Rumble

The adapter emulates an N64 Rumble Pak. Games that check for a Rumble Pak will detect one, and when they activate rumble, the vibration gets forwarded to your Bluetooth controller.

Tested working with:

• Star Fox 64
• Super Mario 64 (Shindou edition)
• The Legend of Zelda: Ocarina of Time
• And many more

Rumble intensity is scaled for Bluetooth controllers — the heavy motor runs at about 50% for a nice feel without being overwhelming.

Troubleshooting

Fast LED Blink — N64 Not Communicating

This means the adapter isn't talking to the N64 console:

• Check your wiring — Data (GPIO 2), 3.3V, and GND
• Make sure the solder joints are solid (no cold joints)
• Verify the correct pins on the N64 cable with a multimeter
• Try pressing the N64 reset button
• Make sure the cable plug is fully seated in the controller port

Slow LED Blink — No Bluetooth Controller

The N64 connection works, but no controller is paired:

• Make sure your controller is in pairing mode (not just powered on)
• Click BOOTSEL to trigger a 60-second scan
• Hold BOOTSEL to clear all bonds and start fresh
• Move the controller closer to the adapter for initial pairing
• Some controllers need to be in a specific BT mode (Classic BT vs BLE)

Buttons Not Responding in Game

• Verify the LED is solid (data flowing)
• Try cycling profiles — you might be on one where the buttons are mapped differently (hold Select + D-Pad)
• Try a different game to rule out game-specific issues

Controller Disconnects Frequently

• Charge your controller — low battery is the most common cause
• Move closer to the adapter (BT range is ~10m / 30ft)
• Hold BOOTSEL to clear bonds and re-pair from scratch
• Avoid other Bluetooth devices nearby that might cause interference

Rumble Not Working

• Not all N64 games use the Rumble Pak — try Star Fox 64 to verify
• Make sure your Bluetooth controller supports vibration
• The adapter must see a Rumble Pak query from the game — some homebrew may not send this

Can't Enter Bootloader for Reflashing

• You need to disconnect from the N64 first — hold BOOTSEL and connect to your PC via USB
• The Pico W's BOOTSEL button is small — use a pen or tweezers if needed

What's Next?

• BT2USB Guide — Same Bluetooth magic but outputs to USB instead
• USB2GC Guide — USB controllers on GameCube (similar concept, different console)
• GC2USB Guide — GameCube controller to USB
• Controller Archive — Full list of supported controllers and pairing instructions
• Community Discord — Share your build, get help

Estimated build time: 30–60 minutes (3 solder connections). Difficulty: Medium.