from machine import Pin
import utime
trigger=Pin(3,Pin.OUT)
echo=Pin(2,Pin.IN)
def ultra():
trigger.low()
utime.sleep.us(2)
trigger.high()
utime.sleep(5)
trigger.low()
while echo.value()==0:
signaloff=utime.tick_us()
while echo.value()==1:
sigon=utime.tick_us()
time= signon-signaloff
distance=(time*0.0330)/2
return(distance)
while True:
ultra()
sleep(1)