from gpiozero import DistanceSensor
from time import sleep

#https://gpiozero.readthedocs.io/en/stable/recipes.html#distance-sensor

sensor = DistanceSensor(
        echo=19, 
        trigger=26, 
        max_distance=4,
        queue_len=5)

while True:
    print('distance', sensor.distance * 100)
    sleep(0.5)