from time import sleep
from machine import Pin, ADC, I2C, PWM
from i2c_lcd import I2cLcd
from hcsr04 import HCSR04


ultrasonic = HCSR04(trigger_pin=13, echo_pin=12, echo_timeout_us=1000000)
AddressOfLcd = 0x27
i2c = I2C(0, scl=Pin(19), sda=Pin(18), freq=400000)
lcd = I2cLcd(i2c, AddressOfLcd, 2, 16)
led1 = Pin(2,Pin.OUT)
led2 = Pin(4,Pin.OUT)
led3 = Pin(5,Pin.OUT)
buzzer = PWM(Pin(16, Pin.OUT))
buzzer.freq(4186)
buzzer.duty(0)
while True:
    distance = ultrasonic.distance_cm()
    print('Distance', 'cm', '|', distance/2.54, 'Inch')
    lcd.clear()
    lcd.putstr('Distance: {:.2f} cm'.format(distance))
    if distance<= 150:
        led1.on()
        led2.off()
        led3.off()
    elif distance<= 250:
        led1.off()
        led2.on()
        led3.off()
    elif distance<= 350:
        led1.off()
        led2.off()
        led3.on()
        buzzer.duty(512)
    else:
        led1.off
        led2.off
        led3.off
        buzzer.duty(0)
    sleep(5)