     if (serial_avail()) {
         char c = Serial.read();
         if (line_edit(c, textbuffer, sizeof(textbuffer))) {
+            print("<");
             int res = cmd_process(commands, textbuffer);
             if (res < 0) {
                 res = ERR_PARSE;;

    // prepare ping message
    fill_buffer(node, PKT_TYPE_PING, 0, NULL);

    print("%s 00 %02X\n", argv[0], node);
    return 0;
}



    fill_buffer(node, type, len, buf);

    print("00\n");
    return 0;
}

