print("MINI PROJECT")
print('By: ALIF FITRI')
print('Date: 20/6/2024')

# Import libraries
import library_oled
from machine import Pin, SoftI2C, PWM, ADC
from utime import sleep

# Pin declaration
Red_led = Pin(26, Pin.OUT)
Green_led = Pin(27, Pin.OUT)
buzzer = PWM(Pin(5, Pin.OUT))
oled_pin = SoftI2C(scl=Pin(23), sda=Pin(22))
ldr_pin = ADC(Pin(14))  # Assuming LDR is connected to pin 32 (ADC1 channel)

# Create an object
display = library_oled.SSD1306_I2C(width=128, height=64, i2c=oled_pin, external_vcc=False)

# Display OLED initial message
display.fill(1)
display.text("SYSTEM CONDITION", x=0, y=10, col=0)
display.text("**STANDBY**", x=20, y=30, col=0)
display.text("0 SMOKE DETECTED", x=0, y=50, col=0)
display.show()

# Main program
while True:
    ldr_value = ldr_pin.read()
    print("LDR Value: {ldr_value}")

    if ldr_value < 500:
        # High light intensity detected
        display.fill(1)
        display.text("SYSTEM CONDITION", x=0, y=10, col=0)
        display.text("**ALERT**", x=20, y=30, col=0)
        display.text("SMOKE DETECTED", x=0, y=50, col=0)
        display.show()

        Green_led.off()
        buzzer.duty(512)  # Half duty cycle to make the buzzer sound

        # Blink red LED fast
        for _ in range(10):  # Blink 10 times
            Red_led.on()
            sleep(0.1)
            Red_led.off()
            sleep(0.1)
        
    else:
        # Normal condition
        Green_led.on()
        buzzer.duty(0)  # Turn off the buzzer
        display.fill(1)
        display.text("SYSTEM CONDITION", x=0, y=10, col=0)
        display.text("**STANDBY**", x=20, y=30, col=0)
        display.text("0 SMOKE DETECTED", x=0, y=50, col=0)
        display.show()
    
    sleep(1)  # Delay for 1 second before reading the sensor again