from machine import Pin, time_pulse_us
from time import sleep_us, sleep
trigger=Pin(27, Pin.OUT)
echo=Pin(26, Pin.IN)
while True:
    #Send a 10 microsecond pulse to trigger pin
    trigger.high()
    sleep_us(10)
    trigger.low()
    #Measure the duration of the echo pulse (in microseconds)
    pulse_duration=time_pulse_us(echo, Pin.high)
    #Calculate the distance (in centimeters) using the speed of sound (343 m/s)
    distance=pulse_duration * 0.0343 / 2
    print("Distance:", distance, "cm")
    sleep(1)