thank you for your feedback!

Sorry for the late reply and thank you very much for your feedback, Mohammad!

Hi Jon
you must combine my python code with the following:

from datetime import datetime

f = open(r"path_to_file.txt","a") # opens the file (a=append, w=write, r=read)

now = datetime.now() # current date and time
date_time = now.strftime("%Y-%m-%d %H:%M:%S") #this formats the datetime
f.write(date_time+str(GPIO.input(readPIN))+"\n") # the final \n adds a carriage return

f.close() # close the file

The first import goes at the beginning of code.
The f.open() goes just after importing the libraries.
The third part goes in the “while True:” loop.
The f.close() goes in the “except KeyboardInterrupt:” part.

Please let me know if this works.
Giuseppe