/ {
    aliases {
        led0 = &user_led;
    };

    leds {
        compatible = "gpio-leds";
        user_led: user_led_0 {
            gpios = <&gpiob 0 GPIO_ACTIVE_HIGH>;
            label = "USER_LED_0";
        };
    };
};

&uart4 {
    status = "okay";
    current-speed = <115200>;
    pinctrl-0 = <&uart4_tx_pa0 &uart4_rx_pd0>;
    pinctrl-names = "default";
};

&usart3 {
    status = "okay";
};