I have two FAN (Model: PVB120G12H-P01) and they have 4 pins. I connected the 12v to the fans, the gnd comes from the power supply to my arduino mega 2560 and from the other gnd to the fans. And the blue pin, I think it is the pwm (control) is straight connected on my arduino.
Then I opend the simhub software, nagivaged to the sketch setup, chose "shakeit pwm fans output" two times, then I have set my two control pins and connected them on my arduino and uploaded my sketch.

My problem is, my fans do still nothing in iracing , i can´t feel an air.
There are a solution for my problem? So I think i must configure a little option in simhub.

Many thanks for your help.

Best regards,

Markus