import utime
utime.sleep(0.1) # Wait for USB to become ready

from machine import Pin

trigger = Pin(0, Pin.OUT)
echo = Pin(1, Pin.IN)

trigger.low()
utime.sleep(0.02)
trigger.high()
utime.sleep(0.05)
trigger.low()

while echo.value() == 0:
    signal_off = utime.ticks_us()

while echo.value() == 1:
    signal_on = utime.ticks_us()

time_passed = signal_on - signal_off
distance = (time_passed * 0.0343) / 2

print(f"Distance: {distance:.2f} cm")