About hacking neuroskyeeg star wars force trainer toy

hello, i am begining my jurney on arduino with a fun EEG project, using star wars force trainer 2 toy. tho i seem to run into a few errors, problems where i thought you might be able to help. I can only get the data to show if i listen on 57600 serial, however the serial monitor still gives me errors such as ERROR: checksum and ERROR: packet too long 133. This is the code:

// Arduino Brain Library - Brain Serial Test

// Description: Grabs brain data from the serial RX pin and sends CSV out over the TX pin (Half duplex.)
// More info: https://github.com/kitschpatrol/Arduino-Brain-Library
// Author: Eric Mika, 2010 revised in 2014

#include <Brain.h>

// Set up the brain parser, pass it the hardware serial object you want to listen on.
Brain brain(Serial);

void setup() {
    // Start the hardware serial.

void loop() {
    // Expect packets about once per second.
    // The .readCSV() function returns a string (well, char*) listing the most recent brain data, in the following format:
    // "signal strength, attention, meditation, delta, theta, low alpha, high alpha, low beta, high beta, low gamma, high gamma"
    if (brain.update()) {

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