“hysteresis” huh? This is the word I haven’t heard in a long time.
I wouldn’t advice the setup option #1 because additionally to the elements there’s possibility of other obstructions to the beam, such as people walking by, or birds flying etc. As for option #2 it is possible to lower the sensitivity by increasing the sensor threshold in the settings.
But I’d say option #3 is the winner in this case. Please this post for wired sensor setup info and firmware.
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