# Neu khoang cach < 10 cm -> bat den

# Neu lon hon -> tat den

from machine import Pin, time_pulse_us

import time




TRIG_PIN = 27

ECHO_PIN = 14




trig = Pin(TRIG_PIN, Pin.OUT)

echo = Pin(ECHO_PIN, Pin.IN)




led = Pin(12, Pin.OUT)




while True:

  # Tinh toan khoang cah

  # Neu d < 10 => bat den

  # neu d >= 10 => tat den

  trig.on()

  time.sleep_us(10)

  trig.off()

  duration = time_pulse_us(echo, 1);

  d =  duration/58

  print("Khoang cach: ", d," cm")

  if( d < 10):

    led.on()

  else:

    led.off()

  time.sleep(1)