It is what is programmed on the Arduino; you can edit the code to suit your project.
Suggestions:
- Modify your Arduino code to send meaningful strings (CSV or otherwise) that you can receive and display. My code example does this.
- trim() the received string.
- split() the trimmed, received string into a String array.
- convert the string elements in the array into a float (or datatype(s) that you were sending) for use in your main code.