from machine import time_pulse_us , Pin , I2C
from lcd_i2c import LCD
import time

#define the trig and Echo PIn

TRIG_PIN = 14
ECHO_PIN = 12
lED = 27
NUM_COLS = 16
NUM_ROWS = 4

trig = Pin(TRIG_PIN,Pin.OUT)
echo = Pin(ECHO_PIN,Pin.IN)
led = Pin(lED,Pin.OUT)
# LCD setup
i2c = I2C(0, scl=Pin(21), sda=Pin(22), freq=800000)
lcd = LCD(addr=I2C_ADDR, cols=NUM_COLS, rows=NUM_ROWS, i2c=i2c)

def get_distance():
    trig.value(1)
    time.sleep_ms(10)
    trig.value(0)
    
    #wait to recieve
    duration = time_pulse_us(echo,1,300000)

    #print(duration)

    #calculate distance in cm
    distance = (duration * 0.0343) // 2

    return distance
lcd

lcd.print('hellloo')

while True:
    obj_distance = get_distance()
    open_led(obj_distance)

    #print(f'distance : {obj_distance}')