Blink Led

ongone93 asked 6 years ago

Hi everyone,

I have a small issue. I’m trying to blink an LED with micropyhon without using the sleep() method. I used the time() method, but it is not blinking for the expected delay.

Here is my code:

from machine import Pin
from time import time
led = Pin(2, Pin.OUT)
last_blink_time = 0
delay_time = 0.5
while True:
    led.value()
    if (time() - last_blink_time) > delay_time:
        if led.value() == 1:
            led.value(0)
        else:
            led.value(1)
        last_blink_time = time()

I will really appreciate your help.

1 Answers

0 Vote Up Vote Down

Sara Santos Staff answered 6 years ago

Hi.

I’ve tested your code and it blinks the LED every seconds instead of every half a second.

That happens because the time() method has only second precision. For higher precision you need to use ticks_ms() method, for example. You can read all about this here:

https://docs.micropython.org/en/latest/library/utime.html#utime.time

I hope this helps solving your problem.

Let me know if you need further help.

Regards,
Sara