from machine import Pin, I2C
import time
import ssd1306
trig = Pin(5, Pin.OUT)
echo = Pin(18, Pin.IN)
i2c = I2C(0, scl=Pin(22), sda=Pin(21))
oled = ssd1306.SSD1306_I2C(128, 64, i2c)
def get_distance():
    trig.off()
    time.sleep_us(2)
    trig.on()
    time.sleep_us(10)
    trig.off()
    while echo.value() == 0:
        pulse_start = time.ticks_us()
    while echo.value() == 1:
        pulse_end = time.ticks_us()
    pulse_duration = time.ticks_diff(pulse_end, pulse_start)
    distance = (pulse_duration * 0.034) / 2
    return distance
while True:
    dist = get_distance()
    oled.fill(0)
    oled.text("Ultrasonic", 0, 0)
    oled.text("Distance:", 0, 20)
    oled.text(str(int(dist)) + " cm", 0, 40)
    oled.show()
    print("Distance:", dist, "cm")
    time.sleep(1)