axis_l and axis_r: signal for centered position is missing

[Vrumf0ndel]

Hi everyone. For my application, I need to measure the time a button or stick is pressed or moved. This works fine for all buttons. Also the trigger buttons axis range is from 0.000 to 1.000 as expected.

But the axis axis_l and axis_r values are only set if value is above treshold, but never on centered position. I'm missing the value 0.000 0.000 to detect centered position. Without I can't distinguish between stick is released or hold on that position.

Axis axis_l moved to 0.000 -0.230
Axis axis_l moved to 0.000 -0.578
Axis axis_l moved to 0.000 -1.000
Axis axis_l moved to 0.000 -0.871
Axis axis_l moved to 0.000 -0.378

Axis axis_l moved to 0.000 0.417
Axis axis_l moved to 0.000 0.702
Axis axis_l moved to 0.000 1.000
Axis axis_l moved to 0.000 0.802
Axis axis_l moved to 0.000 0.513

Axis axis_l moved to -0.255 0.000
Axis axis_l moved to -0.293 0.000
Axis axis_l moved to -0.394 0.000
Axis axis_l moved to -0.455 0.000
Axis axis_l moved to -0.957 0.000
Axis axis_l moved to -1.000 0.000
Axis axis_l moved to -0.959 0.000
Axis axis_l moved to -0.239 0.000

Axis axis_l moved to 0.234 0.000
Axis axis_l moved to 0.368 0.000
Axis axis_l moved to 0.667 0.000
Axis axis_l moved to 0.865 0.000
Axis axis_l moved to 1.000 0.000
Axis axis_l moved to 0.791 0.000
Axis axis_l moved to 0.481 0.000
Axis axis_l moved to 0.268 0.000

Also tried with second controller, but it's the same output.

[Vrumf0ndel]

The issues were found in latest release v1.1.2 from Jul 20, 2018.

Now I've tried the latest files from unreleased master branch, and the issues were solved. Also the hat/dpad issues with not signaling rest position are solved.

@linusg Please provide an official release with the latest changes. Thanks in advance.

UPDATE: The issue is not solved. I experimentally changed the source code but didn't have it in mind when I wrote this post.

[Vrumf0ndel]

The issue is in controller.py line 300:

    def axis_callback(self, axis, val):
        if (
            axis.when_moved is not None
            and abs(val) > self.axis_threshold
            and callable(axis.when_moved)
        ):
            axis.when_moved(axis)

The callback is only done if the value is above treshold. So it never signals the rest zone of the stick or the hat/dpad.

[Vrumf0ndel]

I found an interesting article about implementing deadzones and their different effects: Understanding thumbstick deadzones

I will try to find a solution by implementing such a deadzone by myself.

[lerrylei]

Were you ever successful in finding a solution to this problem?