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resistor (voltage) ladder input for button assigned functions #1501

@bob-u

Description

@bob-u

I searched discord and docs but could not find this functionality.

Problem

Add resistor ladder (key1 in car stereos) button input

Besides using a single wire for multiple buttons in DIY projects, resistive ladder, known as key1 wire, is commonly used with steering wheel controls which could be used for wireless/wired gaming wheels
https://electronics.stackexchange.com/questions/99417/what-resistors-to-use-to-read-several-buttons-with-a-single-analog-pin

Solution

Assign ADC value (plus/minus threshold) to a function (button)

Do you plan to work on this feature yourself?

I'm trying to but I'm not a programmer to help with official code. From what I can tell, functions already exist to init and read ADC (analog addon) as well as to add inputs (io expander) that can be used to create voltage ladder addon.

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