from machine import Pin
import utime
buzzer=Pin(6,Pin.OUT)
trigger=Pin(15,Pin.OUT)
echo=Pin(14,Pin.OUT)
while True:
         trigger.low()
         utime.sleep_us(2)
         trigger.high()
         utime.sleep_us(5)
         trigger.low()
while echo.value()==0:
         signaloff=utime.ticks_us()
while echo.value()==1:
         signalon=utime.ticks_us()
         timepassed=signalon-signaloff
         distance=(timepassed*0.0343)/2
         print("total distance",distance,"cm")
         print("sensor")
         utime.sleep_us(1)