Combine python script with blynk script

Need Help With My Project
1

hello, can someone help how can i combine my python script with blynk script so that my blynk apps run at the same time with my hardware? so basically my hardware have the ultrasonic sensor with buzzer. the buzzer will triggered once the ultrasonic sensor measure a distance that is less than 30cm. i wanted to make the value display widget in blynk run at the same time that ultrasonic measure the distance.

these are my python script :

import _thread
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

GPIO_TRIGGER = 4
GPIO_ECHO = 17
GPIO_BUZZER = 18

GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
GPIO.setup(GPIO_ECHO, GPIO.IN)
GPIO.setup(GPIO_BUZZER, GPIO.OUT)

GPIO.output(GPIO_TRIGGER, False)
GPIO.output(GPIO_BUZZER, False)

keepRunning = True
distance = 0

def measureDistance():
    GPIO.output(GPIO_TRIGGER, False)
    time.sleep(0.5)
    GPIO.output(GPIO_TRIGGER, True)
    time.sleep(0.00001)
    GPIO.output(GPIO_TRIGGER, False)
    start = time.time()
    while GPIO.input(GPIO_ECHO) == 0:
        start = time.time()

    while GPIO.input(GPIO_ECHO) == 1:
        stop = time.time()

    elapsed = stop - start
    distance = elapsed * 17150
    return distance

def playSound(threadName, delay):
    keepRunning
    distance
    while keepRunning:
        if distance <= 30:
            GPIO.output(GPIO_BUZZER, True)
            time.sleep(0.01 * distance)
            GPIO.output(GPIO_BUZZER, False)
            time.sleep(0.05 * distance)

        time.sleep(delay)

try:
    distance = measureDistance()
    _thread.start_new_thread(playSound, ("BuzzerThread1", 0.01))
    while True:
        print (distance)
        time.sleep(0.1)
        distance = measureDistance()
except:
    keepRunning = False
    time.sleep(1)
    GPIO.cleanup()

and these is the blynk script:

import BlynkLib
import time

BLYNK_AUTH = 'YourAuthToken'

# initialize Blynk
blynk = BlynkLib.Blynk(BLYNK_AUTH)

# register the task running every 3 sec
# (period must be a multiple of 50 ms)
def my_user_task():
    # do any non-blocking operations
    print('Action')
    blynk.virtual_write(2, time.ticks_ms() // 1000)

blynk.set_user_task(my_user_task, 3000)

# start Blynk (this call should never return)
blynk.run()

please help me :persevere:

2

What have you tried so far?

I haven’t tried this, but I would suggest adding in the imports, Auth & init and blynk.run()

Then put a virtual write after the print(distance), and see what happens.

And if it first doesn’t work, juggle things around until it does… that’s usually how I learn :stuck_out_tongue:

1 Like
3

Here you go: