# CODE FOR ULTRASONIC WITH BUZZER AND LCD

from machine import Pin
from time import sleep, sleep_us, ticks_us

trigger = Pin(3, Pin.OUT)
echo = Pin(4, Pin.IN)
buzzer = Pin(16, Pin.OUT)

while True:
    trigger.value(0)
    sleep_us(2)

    trigger.value(1)
    sleep_us(10)
    trigger.value(0)

    while echo.value() == 0:
        signal_off = ticks_us()

    while echo.value() == 1:
        signal_on = ticks_us()

    time_passed = signal_on - signal_off
    distance = (time_passed * 0.0343) / 2

    print("DISTANCE:", distance, "cm")

    if distance < 50:
        buzzer.value(1)
        print("BUZZER ON")
    else:
        buzzer.value(0)
        print("BUZZER OFF")

    sleep(1)