send_time.py

import serial
import time
from datetime import datetime

# Change this to match your Arduino COM port
# Run this with after running .ino
arduino = serial.Serial('COM4', 9600, timeout=1) # change
time.sleep(2)  
print("Python Time Server started...")

while True:
    if arduino.in_waiting > 0:
        request = arduino.readline().decode().strip()
        if request == "GETTIME":
            now = datetime.now()
            current_time = now.strftime("%H:%M:%S,%d/%m/%Y\n")
            arduino.write(current_time.encode())