HandWashingTimer

import RPi.GPIO as GPIO
import time
from gpiozero import Buzzer
import csv
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(16,GPIO.OUT)
GPIO.setup(12,GPIO.OUT)
GPIO.setup(23,GPIO.OUT)
TRIG = 5
ECHO = 6                        #setting up the breadboard and pins

def greenled():
    print("LED on")
    GPIO.output(16,GPIO.HIGH)
    time.sleep(0.9)
    print("LED off")
    GPIO.output(16,GPIO.LOW)        #my green LED's code
    
def redled():
    print("LED on")
    GPIO.output(12,GPIO.HIGH)
    time.sleep(0.9)
    print("LED off")
    GPIO.output(12,GPIO.LOW)        #my red LED's code
    
def buzzer():
    GPIO.output(23,GPIO.HIGH)
    time.sleep(1)
    GPIO.output(23,GPIO.LOW)        #my buzzer's code
            
def distcheck():
    GPIO.output(TRIG, True)
    time.sleep(0.0001)
    GPIO.output(TRIG, False)
    
    while GPIO.input(ECHO) == 0:
        pulse_start = time.time()
        
    while GPIO.input(ECHO) == 1:
        pulse_end = time.time()
        
    pulse_duration = pulse_end - pulse_start
    
    distance = pulse_duration * 17150
    
    distance = round(distance, 2)
    
    return distance     #checks and gathers information on distance from the ultrasonic sensor

while True:
    
        print("distance measurement in progress")

        GPIO.setup(TRIG,GPIO.OUT)
        GPIO.setup(ECHO,GPIO.IN)

        GPIO.output(TRIG, False)
        print("waiting for sensor to settle")
        time.sleep(2)

        print(distcheck())      #displays the distance for the user to see in the shell
        
        while (distcheck()) <= 17:      #measures if hands are beneath the tap to wash hands 

            for (x) in range (20):
                greenled()
                time.sleep(0.1)         #makeshift timer from 20
                
                if  (distcheck()) >= 17:
                    redled()
                    buzzer()
                    break        #stops the timer if someones hands move away and alerts them if its too early
        
            break
        
        if (distcheck()) >= 17:
            print("looping")        #shows user that the code has not started yet
        
GPIO.cleanup()