Document reverse acting control using simple_pid about simple-pid HOT 3 CLOSED

Oh, it is! You are right. Sorry to cause you work.

from simple-pid.

You need to use negatives gains for all the control actions that you use (proportional, integral, derivative)

I agree that maybe in the README there could be a bit more documentation about the structure of the controller and so on but since it's a classical control strategy you can find a lot of information on Google

Wikipedia, related question in stackoverflow

from simple-pid.

Checking the README it actually appears to be documented:

To use the PID in reverse mode, meaning that an increase in the input leads to a decrease in the output (like when cooling for example), you can set the tunings to negative values:
pid.tunings = (-1.0, -0.1, 0)
Note that all the tunings should have the same sign.

from simple-pid.