# import all related module 
from machine import Pin, SoftI2C, PWM
import hcsr04
import oled
from utime import sleep

# declare pin connection for ultrasonic 
# create an object for ultrasonic using oop 
# format oop --> library.name.class name()

abu = hcsr04.HCSR04(trigger_pin=27, echo_pin=26, echo_timeout_us=500*2*30)
i2c_oled = SoftI2C(scl=Pin(22), sda=Pin(21))
oled_width = 128 #based on spec
oled_height = 64 #based on spec
oled = oled.SSD1306_I2C(oled_width, oled_height, i2c_oled)
buzzer = PWM(Pin(33), Pin.OUT) #buzzer


while True:
    # test abu
    jarak_in_mm = abu.distance_mm()
    jarak_in_cm = abu.distance_cm()


    # oled
    oled.fill(0)
    oled.text('object detected', 0, 0, 1)
    oled.text(str(jarak_in_cm), 0, 30, 1)
    oled.text('cm', 70, 30, 1)
    oled.text(str(jarak_in_mm), 0, 50, 1)
    oled.text('mm', 40, 50, 1)
    oled.show()


    # making decision
    if jarak_in_cm <= 200:
        for i in range (5):
            buzzer.init(freq=800, duty=300)
            sleep(1)
            buzzer.init(freq=1, duty=0)
            sleep(1)

    elif 100 <= jarak_in_cm:
        for i in range (5):
            buzzer.init(freq=400, duty=300)
            sleep(0.5)
            buzzer.init(freq=1, duty=0)
            sleep(0.5)
    else:
        buzzer.init(freq=1,duty=0)




    # display distance serial monitor
    print("the distance from object in mm:",jarak_in_mm)
    print("the distance from object in cm:",jarak_in_cm)
    print('----------------------------------------')
    print('\n')



    # making buzzer sound
    

    sleep(5)