irrigation_system/software/apps/gateway/boards/common_4MB.dtsi

&flash0 {
    reg = <0x0 0x400000>; /* 4MB flash */
};

#include "espressif/partitions_0x0_default_4M.dtsi"

/ {
    chosen {
        zephyr,shell-uart = &uart0;
        zephyr,uart-mcumgr = &usb_serial;
    };
};

&usb_serial {
    status = "okay";
};