#Telling Distance using Ultrasonic Sensor
from machine import Pin
import utime
trigger = Pin(3, Pin.OUT)
echo = Pin(2, Pin.IN)

def myUltra():
    
    trigger.low()     #Turn off pulse
    utime.sleep_us(2)
   
    trigger.high()   #Turn on pulse
    utime.sleep_us(5)
    trigger.low()
   
   #a loop for checking if receiver received any signal
    while echo.value() == 0:
        signaloff = utime.ticks_us()  #store the current time stamp
    while echo.value() == 1:
        signalon = utime.ticks_us()  #store the current time stamp
    
    TotalTime = signalon - signaloff
    distance = (TotalTime * 0.0343) / 2  #0.0343 is speed of sound in cm/us
    print("The distance from object is ",distance,"cm")
while True:
    myUltra()
    utime.sleep(1)