from machine import Pin
import time


trigger = Pin(7, Pin.OUT)
echo = Pin(6, Pin.IN)


print("Begin")

while True:
    trigger.value(0)
    time.sleep_us(5)
    trigger.value(1)
    time.sleep_us(10)
    trigger.value(0)
    echoTime = machine.time_pulse_us(echo, 1, 1000000)
    cm = (echoTime * 0.034005) * 0.5
    cm = round(cm,2)
    print(cm, "cm")
    time.sleep(2)