There are a few open source projects around that allow for people to build their own wheels, while we do offer commercial solutions we'd like to offer ours as well for those interested in a low cost DIY wheel. While not strictly open source/free, it's for the most part open.
Our solution differs from the rest, there is no physical controller, instead we have have a soft FFB controller running on the PC sending force commands directly to the driver. The firmware in the driver is customized so that the actual FFB effects are done with fuzzy logic PID instead of on a separate controller.
We also have a motor configuration tab, which means that you don't have to go through the tedious traditional odrive solution to get your motor calibrated and configured.
1. Telemetry support.
2. Software can accommodate button boxes, pedals, shifters via SimNerve protocol
3. No runaway conditions during crashing
4. Ultra low latency
You can see a video of one of the second generation wheels here:
The typical small/large motors don't work that great, the large MiGe perhaps, but you can get some 130mm wheels that are rated at 6Nm @ 6A, these are ideal and you'll get around 20Nm at 22A. The ideal numbers you're looking for on your motors are for peak torque at either 30A or 60A. While you can push 80A with some cooling, you'll have less hassle if you use motors wound for lower current.
Don't panic about getting 20Nm out of a wheel, 10Nm will be enough for most people.
Use a good quality PSU and make sure you use shielded power and encoder cables. If possible mount the driver next to or on the back of the motor.
If using a single channel clone board you need a passive brake resistor.
Use a USB cable with a EMI filter, the Odrive generates a lot of noise and USB cables without filters will have latency and other performance problems.
Software / Firmware
Install Vjoy + SimNerve App
Configure Vjoy and enable FFB support
At this point you'd need your motor setup and your driver connected and working
Flash custom firmware and send your serial number (available in the motor control section, this firmware requires a single life long license per driver)
Reflash with licensed custom firmware and configure driver & motor
Next is to setup the driver and motor config, calibrate the motor, save, restart, center the wheel, restart and it should work