from hcsr04 import HCSR04
from machine import Pin, I2C
import ssd1306
import time  

i2c = I2C(scl=Pin(22), sda=Pin(21), freq=100000)
lcd = ssd1306.SSD1306_I2C(128, 64, i2c)

sensor = HCSR04(trigger_pin=5, echo_pin=16, echo_timeout_us=1000000)

buzzer_pin = 12 
buzzer = Pin(buzzer_pin, Pin.OUT)

try:
    while True:
        distance = sensor.distance_cm()
        print("Distance in cm:", distance)
        lcd.fill(0)
        lcd.text("Distance:", 30, 20)
        lcd.text(str(distance), 30, 40)
        lcd.show()

        if distance < 50:
            buzzer.on()  
            time.sleep(0.5)  
            buzzer.off()  

except KeyboardInterrupt:
    pass