import machine
import time

# Define the pins for the trigger and echo
trigger_pin = machine.Pin(12, machine.Pin.OUT)
echo_pin = machine.Pin(14, machine.Pin.IN)

def measure_distance():
    # Send a 10us pulse to start the measurement
    trigger_pin.value(0)
    time.sleep_us(2)
    trigger_pin.value(1)
    time.sleep_us(10)
    trigger_pin.value(0)

    # Wait for the echo pin to go high
    while echo_pin.value() == 0:
        pass
    start = time.ticks_us()

    # Wait for the echo pin to go low
    while echo_pin.value() == 1:
        pass
    end = time.ticks_us()

    # Calculate the duration of the echo pulse
    duration = time.ticks_diff(end, start)

    # Calculate the distance (duration of the echo pulse in microseconds / 58 = distance in cm)
    distance = duration / 58
    return distance

while True:
    print('Distance:', measure_distance(), 'cm')
    time.sleep(1)