from machine import Pin 
import utime

trigger = Pin(20, Pin.OUT) 
echo = Pin(21, Pin.IN)
buzzer = Pin(22, Pin.OUT)  # Assuming you're using GPIO pin 22 for the buzzer

def ultra():
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(5)
    trigger.low()
    while echo.value() == 0:
        signaloff = utime.ticks_us()
    while echo.value() == 1:
        signalon = utime.ticks_us()
    timepassed = signalon - signaloff
    distance = (timepassed * 0.0343) / 2 
    print("The distance from object is ", distance, "cm")

    if distance < 10:  # Example threshold, adjust as needed
        activate_buzzer()

def activate_buzzer():
    buzzer.on()  # Turns on the buzzer
    utime.sleep(0.1)  # Keep it on for a short duration (adjust as needed)
    buzzer.off()  # Turns off the buzzer

while True:
    ultra()
    utime.sleep(1)