debugging

garage_door_script.py

@@ -1,10 +1,36 @@
-import time
-from flask import Flask
+# Python Script To Control Garage Door
+
+# Load libraries
+import RPi.GPIO as GPIO #Import RPi GPIO library
+import time #Import time
+from flask import Flask #Import flask web server
 app = Flask(__name__)
 
-@app.route('/')
-def hello_world():
-    return 'Hello, World!'
+# Set up the GPIO pins
+GPIO.setwarnings(False)
+GPIO.setmode(GPIO.BOARD)
+PIN_TRIG = 40
+PIN_ECHO = 38
+GPIO.setup(7, GPIO.OUT)
+GPIO.setup(11, GPIO.OUT)
+GPIO.output(7, True)
+GPIO.output(11, True)
+
+@app.route('/') #root directory of webserver
+def index():
+    GPIO.setup(PIN_TRIG, GPIO.OUT) #Setup the gpio trigger pin as input
+    GPIO.setup(PIN_ECHO, GPIO.IN) #Setup the gpio echo pin as output
+    time.sleep(2) #Wait for 2 seconds for sensor to settle
+    GPIO.output(PIN_TRIG, GPIO.LOW) #Set trigger to low
+    GPIO.output(PIN_TRIG, GPIO.HIGH) #Set trigger to high
+    time.sleep(0.00001) #Wait for 0.1 milliseconds before setting to low again
+    GPIO.output(PIN_TRIG, GPIO.LOW) #Set trigger to low again
+    while GPIO.input(PIN_ECHO)==0:
+        pulse_start_time = time.time() #Set the start time of when the waves are emitted by the sensor
+    while GPIO.input(PIN_ECHO)==1:
+        pulse_end_time = time.time() #Record the time the waves traveled back to the sensor
+        pulse_duration = pulse_end_time - pulse_start_time #Calculate how long it took for the round trip of the waves
+        distance = round(pulse_duration * 17150, 2) #Convert the time it took to centimeters and round to 2 decimals
 
 if __name__ == '__main__':
-    app.run(host='0.0.0.0')
+    app.run(host='0.0.0.0') #Run the webserver