serial read error help

Projects Programming
25

alright so now i have it printing in uppercase but still no function and it serial prints both literal and upper case muiltiple times

#include <MotorDriver.h>
String readString;
void setup()
{
  Serial.begin(57600);
}
void loop()
{
  if (Serial.available())
  {
    char c = Serial.read();  //gets one byte from serial buffer
    Serial.print(c);
    readString += c; //makes the string readString
    if (readString.length() > 0)
    {
      readString.toUpperCase();
      Serial.println(readString);
      if (readString == "SQUARE JUST PRESSED")
      {
        motordriver.goForward();
      }
     }
  }
}