from machine import Pin, Timer
import time

led_pin = Pin(13, Pin.OUT)  # Change the pin number according to your setup

dot_duration = 0.25
dash_duration = 1
gap_duration = 0.5
repeat_delay = 2

morse_code = "...---..."

def transmit_morse_code():
    for symbol in morse_code:
        if symbol == '.':
            led_pin.on()
            time.sleep(dot_duration)
        elif symbol == '-':
            led_pin.on()
            time.sleep(dash_duration)
        else:
            # Symbol is a space (GAP)
            led_pin.off()
            time.sleep(gap_duration)

        led_pin.off()
        time.sleep(gap_duration)

    time.sleep(repeat_delay)

# Set up a timer to repeatedly transmit the Morse code
timer = Timer()

def on_timer(timer):
    transmit_morse_code()

timer.init(freq=1/2, mode=Timer.PERIODIC, callback=on_timer)

# Run the program indefinitely
while True:
    pass