my version of a sensor filament 1.75mm
you will need 2 screws M2.5 by 4mm long
print the pieces and a piece of PTFE of 4mm diameter by 50mm long
and mechanical endstop modified as in the photos
it will be necessary to make a notch when the PTFE will be in place as in the photo.
I chose to use PTFE to improve the slip and also to guide the introduction of the filament.
simply screw the endstop and clip the hood.
I did not support because everything depends on where you decide to put it
for connection to the raspberry see the image of the gpio
install in Octoprint the Filament Sensor Reloaded plugin (1.0.1)
and configure it as shown in the attached image, free to add gcode.
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