from machine import Pin
import utime

TRIG = Pin(28, Pin.OUT)
ECHO = Pin(27, Pin.IN)
BUZZER = Pin(5, Pin.OUT)

def measure_distance():
    TRIG.low()
    utime.sleep_us(2)
    TRIG.high()
    utime.sleep_us(10)
    TRIG.low()

    while ECHO.value() == 0:
        pulse_start = utime.ticks_us()

    while ECHO.value() == 1:
        pulse_end = utime.ticks_us()

    duration = pulse_end - pulse_start
    distance = (duration * 0.0343) / 2
    return distance

while True:
        dist = measure_distance()
        print("Distance:", dist, "cm")

        if dist < 10:
            BUZZER.high()
        else:
            BUZZER.low()

        utime.sleep(0.5)