I have followed a DIY direct force feed back master. But it only supported AC and ACC.
Now I've had the motor and it's driver. What I need is the torque data to input.
So how can I get the feed back data from LFS ? anyone knows ?

Quote from Turbo_Tonny :

I have followed a DIY direct force feed back master. But it only supported AC and ACC.
Now I've had the motor and it's driver. What I need is the torque data to input.
So how can I get the feed back data from LFS ? anyone knows ?

Shouldn't need anything special assuming the wheel is getting its data from DirectInput over USB. If it's using telemetry as a side-channel for this data you might have more issues

Hi, I'm working on Arduino FFB firmware for quite some time - it's open source and free. It does exactly what you need, you may check it out. There are 2 parts, one is arduino firmware that turns it into an ffb joystick and the other is the GUI for PC to adjust settings. You will need to make a differential amplifier and use 2 external dac's - this will be your analog torque input for the driver. I've provided all documentation, wiring and manuals.

https://github.com/ranenbg/Arduino-FFB-wheel
https://github.com/ranenbg/Arduino-FFB-gui