from machine import Pin, ADC, PWM, I2C
import ssd1306
import time


LDR_PIN = ADC(Pin(34))
LDR_PIN.atten(ADC.ATTN_11DB)

PIR_PIN = Pin(13, Pin.IN)
BUTTON_PIN = Pin(12, Pin.IN, Pin.PULL_UP)

LED_WHITE = Pin(25, Pin.OUT)   # Lampu jalan
LED_RED = Pin(26, Pin.OUT)     # Lampu kecemasan
BUZZER = PWM(Pin(14))# Buzzer
BUZZER.duty(0)
FAN_SERVO = PWM(Pin(27), freq=50)  # Servo sebagai kipas wap

TEMP_PIN = ADC(Pin(32))
TEMP_PIN.atten(ADC.ATTN_11DB)


i2c = I2C(1, scl=Pin(22), sda=Pin(21))  
print("Scanning for I2C devices...")
devices = i2c.scan()

if not devices:
    print("❌ Tiada peranti I2C dikesan. Semak sambungan OLED (SDA=21, SCL=22).")
else:
    print("✅ Peranti I2C dikesan:", devices)

oled = ssd1306.SSD1306_I2C(128, 64, i2c, addr=0x3C)


LDR_THRESHOLD = 2000
TEMP_THRESHOLD = 30  

def set_angle(angle):
    duty = int((angle / 70) * 102 + 26)
    FAN_SERVO.duty(duty)

while True:
    # --- Bacaan sensor ---
    ldr_val = LDR_PIN.read()
    pir_val = PIR_PIN.value()
    button_val = BUTTON_PIN.value()
    temp_val = TEMP_PIN.read() / 4095 * 100  

    # --- Lampu jalan automatik ---
    if ldr_val < LDR_THRESHOLD and pir_val == 1:
        LED_WHITE.value(1)
    else:
        LED_WHITE.value(0)

    # --- Lampu kecemasan & buzzer ---
    if button_val == 0:
        LED_RED.value(1)
        BUZZER.freq(1000)  
        BUZZER.duty(500)
    else:
        LED_RED.value(0)
        BUZZER.duty(0)

    # --- Kipas wap (servo) ---
    if temp_val > TEMP_THRESHOLD:
        set_angle(0)
        time.sleep(0.2)
        set_angle(60)
        time.sleep(0.2)
        fan_status = "ON"
    else:
        set_angle(0)
        fan_status = "OFF"
        time.sleep(0.2)
        

    
    oled.fill(0)
    oled.text("Smart Street Lamp", 0, 0)
    oled.text("Temp: {:.1f} C".format(temp_val), 0, 16)
    oled.text("Fan: " + fan_status, 0, 32)
    oled.text("LDR: {}".format(ldr_val), 0, 48)
    oled.show()

    
    print("LDR:", ldr_val, "PIR:", pir_val, "Button:", button_val, "Temp:", temp_val, "Fan:", fan_status)

    time.sleep(1)