Grove - Dual Button includes 2 buttons, enables you to control two signal channels with one grove module. With 4 different color keycaps provided, you can freely adjust the color combination as needed.
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The button is simply driven by the GPIO Digital Pins. When the button is pressed, the Pins can reach a LOW signal from the button; on the other hand, when it is in the loosen state, Pins will always gain a HIGH signal until it is pressed.
Hardware eagle files