AxisFilterByAvg.py

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########################
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# PLEASE READ THIS
# A newer and improved version of this filter was developed by WhiteMagic grab it at
# https://www.dropbox.com/s/2kdmku7tznbj42r/average_filter.py?dl=0

import math
import time

import gremlin
from gremlin.spline import CubicSpline
from collections import deque

# Device creation
#new way
wingman = gremlin.input_devices.JoystickDecorator(
    "Wingman",
    "{3DC8CDC0-6AAC-11E9-8002-444553540000}",
    "Default"
)

_threshold = 0.95 #safety measure to reach axis end

_last_values_x = [0] * 5 # define number of samples that will go into average (for both axes)
_last_values_y = [0] * 5
last_values_x = deque(_last_values_x)
last_values_y = deque(_last_values_y)

curve = CubicSpline([ #the expected result here is a curve along with smoothing
    (-1.0, -1.0),
    (-0.74, -0.52),
    ( -0.176,  -0.14),
    ( 0.176,  0.14),
    ( 0.74,  0.52),
    ( 1.0,  1.0)
])

def averageAxis(axisval, last_values):
    global _threshold
    last_values.popleft()
    last_values.append(axisval)
	
    if abs(curve(axisval)) < _threshold: 
        return curve((sum(last_values) / len(last_values)))
    else:
	    return curve(axisval)

@wingman.axis(1)
def roll(event, vjoy):
    global last_values
	
    vjoy[1].axis(1).value = averageAxis(event.value, last_values_x)
	
@wingman.axis(2)
def roll(event, vjoy):
    global last_values
	
    vjoy[1].axis(2).value = averageAxis(event.value, last_values_y)

The file was deleted, anyone have a copy?

Yep, added to my dropbox share: https://www.dropbox.com/s/4dz1ibrav2e11ci/Plugins.zip?dl=0