SerialMode.java

import java.io.File;
import java.io.FileWriter;

public class SerialMode {
        public static void main(String[] args) throws Exception {
                String mode = "422";
                String path = "/sys/class/modSerial/icaro_ttyS0/mode";
                FileWriter fw = new FileWriter(new File(path));

                fw.write(mode);
                fw.close();
        }
}