WIP: Fix/linear pwm adjustment

[jwefers]

Addressing #266

This throws out the PID approach, instead linearly approaches the desired fan speed, capped to x amount of change per second. On my system, it feelds solid and not unpleasant.

Work is needed in understanding why the scaling into a window of possible (still-rotating) fan speeds is needed, as this is not really hidden from the user when they are supposed to give a step function themselves.

I understand the idea of staying within supported min and max, but i think it defies expectations when still having to give 0-255 for desired values. Maybe percent is better then. Let the user give fan speed percentage values with internally map in between min and max supported. Maybe even raise the min boundary to lowest-still-spinning when neverStop is set. But it should be made transparent to the user what happens with their values internally.

[jwefers]

Once i find time, i would like to change this PR to:

• offering the user a configurable choice between the PID algorithm and the simple linear approach, i.e. have curves have a setting controlAlgorithm: pid|linear with pid being the existing default so that its backwards compatible.

[markusressel]

Hey @jwefers !

As you might have noticed, I have invested some time into finishing this up.
I am quite happy with the current result, but some third party testing would be appreciated before I merge this into main and break everyones config 🤣

Would you be able to test the PR in its current form?

[jwefers]

wow, i lost track of this...i became a parent :D

i'll let you know once i find some evening time to game and test it out :)

thanks

[markusressel]

Haha, congrats! 😄 👶
Let me know if its too much, no worries :)

[markusressel]

I have been running and testing this branch extensively for the last days, so I think I feel quite comfortable merging this now.
Thx again for the efforts, until the next time! 😄