from machine import Pin, I2C
from machine import sleep
import ssd1306
from hcsr04 import HCSR04
from time import sleep


# ESP32 Pin assignment 

RED = Pin(17, Pin.OUT)
sensor=HCSR04(trigger_pin=5, echo_pin=18, echo_timeout_us=10000)
leds = [RED]
while True:

    distance = str(sensor.distance_cm())
    print('Distance=',distance,'cm')
    sleep(0.0005)

    if sensor.distance_cm()>= 40:
        led.value(1)
        sleep(3)
    else 
        led.value(0)