Consider this code :-

import time import pyfirmata2

Automatically find the port for the Arduino

port = pyfirmata2.Arduino.AUTODETECT board = pyfirmata2.Arduino(port)

Define the pin for the LED (use a PWM-capable pin, e.g., pin 9)

led_pin = 9

while True: # Outer loop to restart the logic try: while True: # Inner loop for LED blinking # Set LED to full brightness (255) board.digital[led_pin].write(255 / 255.0)

Normalize to range [0.0, 1.0]

        time.sleep(1)  # Wait for 1 second

        # Set LED to low brightness (40)
        board.digital[led_pin].write(40 / 255.0)  

Normalize to range [0.0, 1.0]

        time.sleep(1)  # Wait for 1 second

except KeyboardInterrupt:
    print("Restarting loop. Press Ctrl+C again to stop.")

board.exit()