Blynk App to control gpio on raspberry pi zero w

Need Help With My Project
1

Hi, im trying to control the gpio of Raspberry Pi Zero W using Blynk

I tried using the following code to test the connection,

import blynklib

BLYNK_AUTH = 'YourAuthToken'

# initialize Blynk
blynk = blynklib.Blynk(BLYNK_AUTH)

WRITE_EVENT_PRINT_MSG = "[WRITE_VIRTUAL_PIN_EVENT] Pin: V{} Value: '{}'"


# register handler for virtual pin V4 write event
@blynk.handle_event('write V4')
def write_virtual_pin_handler(pin, value):
    print(WRITE_EVENT_PRINT_MSG.format(pin, value))

###########################################################
# infinite loop that waits for event
###########################################################
while True:
    blynk.run()

its works and i can get outputs by toggling a button set to a virtual pin.

image
image965×128 30.7 KB

then i added

@blynk.handle_event('write V4')
def write_virtual_pin_handler(pin, value):
    print(WRITE_EVENT_PRINT_MSG.format(pin, value))
    if int(value) == 1:
         GPIO.output(led_pin, GPIO.HIGH)
   else:
         GPIO.output(led_pin, GPIO.LOW)

but my led doesn’t light up when i toggle the button.
Please advice.

PS: i did define and setup the led pins.

2

@Tamago please edit your post, using the pencil icon at the bottom, and add triple backticks at the beginning and end of your code so that it displays correctly.
Triple backticks look like this:
```

Pete.

3

I have done so. Thanks.