Filament runout detection

Finally got around to build something to deal with running out of filament when printing from Octoprint (not direct from SD card) on my Ender 3 Pro.

I created this bracket to use with the following switches:
https://www.amazon.com/gp/product/B00MFRMFS6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I connected the two outer most connections to my raspberry pi as you can see in the pickture.
The housing for the pi is:
https://www.amazon.com/gp/product/B081N3V6BH/ref=ppx_yo_dt_b_asin_image_o06_s01?ie=UTF8&psc=1

Connect it to physical pins of the pi (4B) as shown in the picture.
The wire guide STL is a nice to have if you want to guide the wire to the side of the frame.

I use the filament sensor reloaded plugin for Octoprint and have included a screenshot for the settings for the plugin.

You will also have to tell Octoprint what to do when a print is paused (for you to change filament):
{% if pause_position.x is not none %}
; relative XYZE
G91
M83
; Lower extrude