print("Hello, Pi Pico!")
from machine import Pin
import utime

trigger = Pin(3, Pin.OUT)   # GPIO3 as Trigger pin
echo = Pin(2, Pin.IN)       # GPIO2 as Echo pin

def ultra():
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(5)
    trigger.low()

    while echo.value() == 0:
        signaloff = utime.ticks_us()  # Time when signal is sent

    while echo.value() == 1:
        signalon = utime.ticks_us()   # Time when echo is received

    timepassed = signalon - signaloff
    distance = (timepassed * 0.0343) / 2  # Convert to cm
    print("The distance from object is", distance, "cm")

while True:
    ultra()
    utime.sleep(1)