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

buzz = PWM(Pin(27))
i2c = I2C(0, scl=Pin(32), sda=Pin(33))

oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C (oled_width, oled_height, i2c)

hcsr04 = HCSR04(trigger_pin=18, echo_pin=5, echo_timeout_us=100000)

def sound_buzz(frequency, duration_ms):
    buzz.freq(frequency)
    buzz.duty(512)
    time.sleep(duration_ms)
    buzz.duty()

while True:
    distance = hcsr04.distance_cm()
    print(distance)
    oled.fill(0)
    oled.text("distance", 5,10)
    oled.text('{:.2f}'.format(distance) , 10, 20)
    oled.show
    if distance < 100:
        sound_buzz (700, 70)
else:
    buzz.duty(0)
time.sleep(0.1)