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36 lines
1.5 KiB
36 lines
1.5 KiB
# Python Script To Control Garage Door
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# Load libraries
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import RPi.GPIO as GPIO #Import RPi GPIO library
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import time #Import time
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from flask import Flask #Import flask web server
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app = Flask(__name__)
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# Set up the GPIO pins
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GPIO.setwarnings(False)
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GPIO.setmode(GPIO.BOARD)
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PIN_TRIG = 40
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PIN_ECHO = 38
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GPIO.setup(7, GPIO.OUT)
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GPIO.setup(11, GPIO.OUT)
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GPIO.output(7, True)
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GPIO.output(11, True)
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@app.route('/') #root directory of webserver
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def index():
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GPIO.setup(PIN_TRIG, GPIO.OUT) #Setup the gpio trigger pin as input
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GPIO.setup(PIN_ECHO, GPIO.IN) #Setup the gpio echo pin as output
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time.sleep(2) #Wait for 2 seconds for sensor to settle
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GPIO.output(PIN_TRIG, GPIO.LOW) #Set trigger to low
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GPIO.output(PIN_TRIG, GPIO.HIGH) #Set trigger to high
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time.sleep(0.00001) #Wait for 0.1 milliseconds before setting to low again
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GPIO.output(PIN_TRIG, GPIO.LOW) #Set trigger to low again
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while GPIO.input(PIN_ECHO)==0:
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pulse_start_time = time.time() #Set the start time of when the waves are emitted by the sensor
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while GPIO.input(PIN_ECHO)==1:
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pulse_end_time = time.time() #Record the time the waves traveled back to the sensor
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pulse_duration = pulse_end_time - pulse_start_time #Calculate how long it took for the round trip of the waves
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distance = round(pulse_duration * 17150, 2) #Convert the time it took to centimeters and round to 2 decimals
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if __name__ == '__main__':
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app.run(host='0.0.0.0') #Run the webserver
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