I have a CommanderPro which I love as a little controller for the fans in my custom loop. However, I also have six Lian Li Uni Fans. These fans have some very nice RGB and a cute daisy chain system... they also come with their own little controller. The Lian Li controller can take a PWM signal from another source to set the speeds of the attached fans, however, the connector from the Lian Li controller to the PWM source only has a single wire (i.e. it does not have a "tach" wire to report back RPM to the thing producing the PWM signal). Attached is the wiring diagram (my red circle showing the signal wire).
What this means is that I can't control my Lian Li fans from my CommanderPro at all, since the CommanderPro only lets me build customer curves of RPM vs Temperature... but since the Lian Li controller doesn't report back speed, it means that the CommanderPro always thinks those fans aren't spinning and keeps increasing the internal PWM signal.
While I agree with @DevBiker's points about percentage being a bad control variable since a fan's response to PWM percent is highly non-linear; in my case, since I don't have speed reported back, I actually do need to be able to build a curve that's at a lower level of abstraction. I.e. I need to build a PWM Percent vs. Temperature control curve.
