In this article we are exploring a very simple interface for any sequential shifter based on two switches to connect directly to a Fanatec Wheelbase. You can use it for Sequential, Static Paddle, Push-Pull shifters or anything else that comes to your mind for Up and Down Shift.
This How-To is based on the Fanashifter Project and we will be using the Shiftr2 (Sequential) port on the Fanatec Wheelbase.
This is very simple Project and require almost no skills - it as simple as to wire two switches using pre-made RJ12 straight cable (or you can make your own if you have crimp tool).
Main Features
- Uses internal Fanatec Wheelbase Protocol
- Works with any sequential shifter built with switches
- Works very fast without any delay
- Supported in every game that the standard Fanatec shifter works
- No power needed
- Not verified - should work on Consoles as well
- Connects to the Shifter2 (Sequential) port on wheelbase
This project is completely based on the Fanashifter project: Fanashifter Project on GitHub and is a simplified and easy to use How-To guide. You can find the complete documentation on the Fanashifter GitHub page.
This project requires no power, yet again you could damage your equipment. Furthermore it was tested only on PC and we can confirm only that compatibility. We do not take responsibility for any injury to yourself or any damage to your equipment. Building this project is at your own risk!
Pinout
Fanatec wheelbases use the same RJ12 connectors for compatible devices for years. The Shifter2 is great for interfacing sequential shifter as it is internally wired with pull-up resistor and you only have to connect two switches on pin 4 and 5 which pull to Ground once pressed.
Shifter 2 Pinout
- Pin 1 - Ground
- Pin 2 - Select H-Pattern/Sequential - internally shorted to GND on SH2 port
- Pin 3 - Detect Shifter - internally shorted on SH2 port
- Pin 4 - X-Axis - UpFhift, internally pulled up with resistor on SH2 port
- Pin 5 - Y-Axis - DownFhift, internally pulled up with resistor on SH2 port
- Pin 6 - VCC, +3.3V - still wired if you want to use it to power something, not needed for shifter
Wiring
Based on the above as everything is internally connected on Shifter 2 Port all we need is to create simple cable. We can use pre-made RJ12 straight telephony cable or build one ourselves with crimping tool. Then we need to wire it to the two shifter switches using the followiong simple pinout:
Sequential cable on Shifter 2 Fanatec Wheelbase Port
- Pin 1 - Ground
- Pin 4 - UpShift switch
- Pin 5 - DownShift switch
Conclusion
And simple as that you managed to interface your sequential shifter directly with the wheelbase. This is quite versatile project, I have currently connected my Full Size SG Racing Pro Sequential Shifter in parallel with my Push-Pull Rally Style Shifter 
Making a simple cable is totally worth the effort if you have Fanatec wheelbase and want to connect aftermarket sequential shifter. Not to mention that this works on Consoles as well as it uses the internal wheelbase protocol.
While you are at it you can check my video how I connected my SG Racing Pro Sequential to the DD1 Wheelbase: