CovidBracelet/zephyr/nrf52840_mdk.overlay

/ {
	buttons {
		compatible = "gpio-keys";
		button1: button_1 {
			gpios = <&gpio0 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
			label = "button1";
		};
	};
	aliases {
		sw1 = &button1;
	};

};