import os
import serial
import time

ser = serial.Serial('COM3', 9600) # change port to input port from arduino
filename = 'mitNeumann_0_5'

start_time = time.time()  # start time of read

with open(filename, 'wb') as file:
    while os.path.getsize(filename) < 100000:  # change to the desired file size in bits
        if ser.in_waiting > 0:
            data = ser.read(ser.in_waiting)  # reading the data input from COM port
            print(data)
            file.write(data)
            file.flush() # flush data to write

end_time = time.time()  # end time of read
elapsed_time = end_time - start_time 

seconds = int(elapsed_time)
milliseconds = int((elapsed_time % 1) * 100)

new_filename = f"{filename.split('.')[0]}_TimeInSeconds_{seconds}_{milliseconds}.txt" # filename in format filename_seconds_milliseconds as txt with needed time to finish read

os.rename(filename, new_filename)  # change filename to new filename

print(f"time needed in seconds: {elapsed_time:.2f}. New filename: {new_filename}.")  # console write