from hcsr04 import HCSR04
import time



sensor = HCSR04(trigger_pin=5, echo_pin=18)  

prev = -1  
threshold = 1 

while True:
    
    cur_cm = sensor.get_distance_cm()
    cur_mm = sensor.get_distance_mm()
    if abs(cur_cm - prev) > threshold:  
        print(f"Distance: {cur_cm} cm.......Distance: {cur_mm} mm")
        prev = cur_cm

    time.sleep(1)  
 '''
    x = input("do you want the reading in cm or mm")
    if x == "cm":
        print(sensor.get_distance_cm())
    if x == "mm":
        print(sensor.get_distance_mm())    
    else:
        print("invalid input")'''