print("This project is about ESP32 with ultrasonic")

#import all libraries
import HCSR04
import ssd1306
import tm1637
from machine import Pin, SoftI2C, PWM 
from utime import sleep
#Pin declaration
#Create object called utrasonic sensor using OOP
#OOP format is--> library name. Class name()
ultrasonic_sensor = HCSR04.HCSR04(trigger_pin=5, echo_pin=18, echo_timeout_us=500*2*30)
i2c_oled = SoftI2C(scl=Pin(22), sda=Pin(21))
tm = tm1637.TM1637(clk=Pin(5), dio=Pin(12))
buzzer = PWM(Pin(19), Pin.OUT)
led_red = Pin(2, Pin.OUT)
oled_width = 128 #based on spec
oled_height = 64 #based on spec
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c_oled)

while True:

    object_detect_in_cm = ultrasonic_sensor.distance_cm()
    object_detect_in_mm = ultrasonic_sensor.distance_mm()

    #Display the object distance on seriel monitor/terminal

    print("\nDistance in cm: ",object_detect_in_cm)
    print("\n")
    print("Distance in mm: ",object_detect_in_mm)
    print("............................\n")
    oled.fill(1)
    oled.text('Jarak:', 1, 10, 0)
    oled.text(str(object_detect_in_cm), 20, 20, 0)
    oled.text(" cm", 85, 20, 0)
    #oled.text('Distance in mm:', 1, 30, 0)
    oled.text(str(object_detect_in_mm), 35,  40, 0)
    oled.text(" mm", 65,  40, 0)
    #oled.text('', 38,  50, 0)
    sleep(2)
    oled.show()

    if object_detect_in_cm < 175:
     buzzer.init(freq=1, duty=0)
    else:
     for i in range(20):
        # Tornado siren pattern
        buzzer.init(freq=500, duty=512)  # Start with a high-pitched tone
        sleep(0.1)
        led_red.on()
        sleep(0.1)
        buzzer.init(freq=100, duty=512)  # Transition to a lower-pitched tone
        sleep(0.1)
        led_red.off()
        sleep(0.1)
        buzzer.init(freq=500, duty=512)  # Return to high-pitched tone
        sleep(0.1)
        led_red.on()
        sleep(0.1)
        buzzer.init(freq=100, duty=512)  # Transition to lower-pitched tone
        sleep(0.8)                       # Maintain lower-pitched tone for longer duration
        led_red.off()
        sleep(0.8)