import time
import board
import digitalio
import pulseio

# Define GPIO pins
TRIGGER_PIN = board.GP2
ECHO_PIN = board.GP3

# Initialize GPIO pins
trigger = digitalio.DigitalInOut(TRIGGER_PIN)
trigger.direction = digitalio.Direction.OUTPUT
echo = pulseio.PulseIn(ECHO_PIN)

def get_distance():
    # Trigger the sensor
    trigger.value = True
    time.sleep(0.00001)
    trigger.value = False
    
    # Wait for the echo signal
    echo.clear()
    while len(echo) == 0:
        pass
    
    # Measure the duration of the echo signal
    start_time = time.monotonic()
    while len(echo) > 0:
        pass
    end_time = time.monotonic()
    pulse_duration = end_time - start_time
    
    # Convert the duration to distance (in cm)
    distance = pulse_duration * 17150
    return distance

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