combined.py

    
import RPi.GPIO as GPIO
import time

from flask import Flask, render_template

#GPIO Mode (BOARD / BCM)
GPIO.setmode(GPIO.BCM)
 
#set GPIO Pins
GPIO_TRIGGER = 23
GPIO_ECHO = 24
 
#set GPIO direction (IN / OUT)
GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
GPIO.setup(GPIO_ECHO, GPIO.IN)
 
def distance():
    # set Trigger to HIGH
    GPIO.output(GPIO_TRIGGER, True)
 
    # set Trigger after 0.01ms to LOW
    time.sleep(0.00001)
    GPIO.output(GPIO_TRIGGER, False)
 
    StartTime = time.time()
    StopTime = time.time()
 
    # save StartTime
    while GPIO.input(GPIO_ECHO) == 0:
        StartTime = time.time()
 
    # save time of arrival
    while GPIO.input(GPIO_ECHO) == 1:
        StopTime = time.time()
 
    # time difference between start and arrival
    TimeElapsed = StopTime - StartTime
    # multiply with the sonic speed (34300 cm/s)
    # and divide by 2, because there and back
    distance = (TimeElapsed * 34300) / 2
 
    return distance
 
app = Flask(__name__)
@app.route('/')
def index():
    dist = distance()
    return render_template('open.html', value = dist) 
 
if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

    #try:
    #    while True:
    #        dist = distance()
    #        print ("Measured Distance = %.1f cm" % dist)
    #        time.sleep(1)
    #except KeyboardInterrupt: 
        #    print("Stopped")
        #    GPIO.cleanup()