from machine import Pin
import machine
import utime

trigger = Pin(3, Pin.OUT)
echo = Pin(2, Pin.IN)

def get_distance():
    trigger.low()
    utime.sleep_us(2)
    
    trigger.high()
    utime.sleep_us(10)
    trigger.low()
    
    duration = machine.time_pulse_us(echo, 1, 30000)
    
    distance_cm = (duration * 0.0343) / 2
    
    return distance_cm

while True:
    dist = get_distance()
    print("Distance: {:.2f} cm".format(dist))
    utime.sleep(1)