How to add missing button to LED strip controller in OpenBeken - regain full control over LEDs!

The following guide shows how you can add missing button to any OpenBeken-flashed LED strip. Added button allows you to fully control LEDs, it can power them on and off, it can scroll colors, it can control brightness and toggle temperature modes (warm and cool).
This tutorial assumes that you have already flashed OpenBeken to any supported platform, just like in our guide videos.
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BL602 flashing:
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