print("Hello, Pi Pico W!")
from machine import Pin
import utime
led = Pin(5, Pin.OUT)
trigger = Pin(28, Pin.OUT)
echo = Pin(22, Pin.IN)
def ultra():
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
global distance
global led
distance = (timepassed * 0.0343) / 2
print("The distance from object is ",distance,"cm")
while True:
ultra()
utime.sleep(1)
if distance < 400:
led.value(1)
led.on
utime.sleep_ms(1000)