As a little holiday project I want to control an app via an accessibility switch which is connected via 3,5mm headphone jack to the iOS device.
This is the switch and the plug:
My problem is that I don't have any clue what kind of signal is fired when I press the button - I assumed that it acts similar to a headphone's remote control.
Is there a way to measure the input of this or does anybody know how to get the input of the button on iOS?
from Get input of switch control via headphone jack on iOS
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