from machine import Pin
import utime

trigger = Pin(14, Pin.OUT)  
echo = Pin(15, Pin.IN)      

def measure_distance():
    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 
    return distance

while True:
    distance = measure_distance()  # Measure the distance
    print(f"Distance to impact wall: {round(distance, 2)} cm")
    utime.sleep(0.2)