The Unijoysticle™ 2

Like the original Unijoysticle, but remove WiFi and add Bluetooth.

Unijoysticle 2 allows you to use modern Bluetooth gamepads, e.g Xbox One gamepad, in old computers like the Commodore 64 & 128.

And of course, you can still  use your unicycle to control your retro computer!

Basic functionality

Basic mode

One Bluetooth gamepad controls one joystick. You need two gamepads to control the two joysticks. The mappings are:

    • D-pad/joypad: controls up/down/left/right.
    • Button A: fire button
    • Button B: “up”  (ideal for platform games).
    • Button shoulder-right: autofire.
    • System button swaps between Joystick #1 and #2

Enhanced functionality

Enhanced mode

When in “Enhanced mode”, you control the two joysticks with only one gamepad. The mappings are:

  • Left joypad / d-pad: control Joystick #2 movements.
  • Right joypad: control Joystick #1 movements.
  • Button A: fire for Joystick #2
  • Button B: fire for Joystick #1
  • Button Shoulder Left: auto-fire for Joystick #1
  • Button Shoulder Right : auto-fire for Joystick #2

This mode is ideal for games like Commando or 1942 since it allows you throw grenades / roll by pressing Button B.

Toggle between Basic and Enhanced modes

The Unijoysticle 2 kit, for trade

At the moment, I am not selling Unijoysticle 2 kits. But I’m willing to trade a Unijoysticle 2 kit for:

  • One of your retro-inventions. It could be software or hardware based, for any retro computer [preferred].
  • Or anything retro-related like retro computers, retro peripherals, etc.

Just contact me at: or

Unijoysticle 2 kit
  • 1 x Unijoysticle 2 PCB (PCBWay, OSHPark)
  • 1 x ESP32 Mini Kit (and its pins)
  • 2 x 74HC05N ICs
  • 2 x 14p DIP sockets for the 7405s
  • 1 x standard green LED 3mm ~25mA
  • 1 x standard red LED 3mm ~25mA
  • 2 x 150 ohm resistors
  • 1 x tactile button
  • 2 x db9 female connectors
  • 1 x 1N4001 diode
  • 1 x DC Power Barrel Jack


Unijoysticle 2 is open-source hardware! You can Do-it-Yourself.  All the needed components (firmware, schematic, KiCad layout) are here:

You can source the components from here:

Supported Bluetooth devices

Supported devices

As long as it is a Bluetooth Classic HID device, it is supported (or can be easily supported).

Android, PC, Xbox One and Sony Dualshock 4 are supported. See the complete list here:

Supported retro computers

Supported retro computers

The Unijoysticle 2 was designed for Commodore 64/128, but anything that complies with the Atari DB9 pinout works. See this list:

Supported, but not limited to, computers:

  • Commodore 64  / 64C / SX-64
  • Commodore 128 / 128D
  • Commodore 16 & Plus/4 [*]
  • Commodore Vic-20 [**]
  • ZX-Uno [**]
  • Atari 8-bit line [***]
  • Amiga line [****]
  • Atari ST line [****]

[*]: Requires two DB9 adapters.

[**]: Contains only one joystick port. One cable extension needed.

[***]: Doesn’t fit, requires two cable extensions.

[****]: Doesn’t fit, requires two cable extensions. Buttons 2 & 3 in joystick #2 are not mapped.

Users Guide

The Users Guide including how to solder the kit, how to use it, and more can be found here:

Questions ?

Contact me at: or