from machine import Pin, ADC, PWM
import time
import math



rs = Pin(32, Pin.OUT)
e = Pin (22, Pin.OUT)
data = [
    Pin(21, Pin.OUT),
    Pin(19, Pin.OUT),
    Pin(18, Pin.OUT),
    Pin(5, Pin.OUT)
]

LCD_Clear = 0x01
LCD_Home = 0x02
LCD_Entery = 0x04
Entery_Left = 0x02
LCD_Display = 0x08
Display_ON = 0x04
LCD_FUNCTION = 0x20
FUNC_4BIT_2LINE = 0x08
LCD_SET_DDRAM = 0x80

ROW_ADDR = (0x00, 0x40)

def _pulse():
    e.value(1)
    time.sleep_us(1)
    e.value(0)
    time.sleep_us(50)

def _write4(nibble):
    for i in range 4:
        data[i].value((nibble >> i) & 1)
    _pulse()

def _send(value, is_data):
    rs.value(1 if is_data else 0)
    _write4(value >> 4)
    _write4(value & 0x0F)

def command(cmd):
    _send(cmd, False)
    if cmd in (LCD_Clear, LCD_Home):
        time.sleep_ms(2)
    
def write_char(ch):
    _send(ord(ch), True)

def write_str(text):
    for ch in text:
        write_char(ch)

def set_cursor(col1, row):
    command(0x80 | (ROW_ADDR[row] + col1))

def lcd_init()





ldr = ADC(Pin(33))
ldr.atten(ADC.ATTN_11DB)

pir = Pin(35, Pin.IN)

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

def read_celicus():
    row = ntc.read()
    if row <= 0 or row >= 4095:
        return -273
    r = 4095.0 / row - 1.0
    return 1.0 / (math.log(1.0 / r) / 3950.0 + 1.0 / 298.15) - 273.15

red = Pin(2, freq = 1000, duty=0)
green = Pin(4, freq = 1000, duty=0)
blue = Pin(16, freq = 1000, duty=0)

def set_color(red, gree, blue):
    red.duty(red)
    green.duty(green)
    blue.duty(blue)

btn = Pin(17, Pin.INPUT, Pin.PULL_UP)

armed = False
last_press = 0

def on_press(pin):
    global armed, last_press
    now = time.ticks_ms()
    if time.ticks_diff(now, last_press):
        armed = not armed
        last_press = now

btn.irq(trigger=Pin.IRQ_FALLING, handler=on_press)


Dark_LIMIT = 1500
HEAT_LIMIT = 45

def decide(light, temp_c ,motion):
    if temp_c > HEAT_LIMIT:
        return "ALERT"

    if armed and light < Dark_LIMIT and motion == 1:
        return "ALERT"

    if armed:
        return "ARMED"
     return "OK"


buzzer = PWM(Pin(32), freq=1000, duty=0)

lcd_init()

light = 0
temp_c = 0.0
state = "OK"
last_sense = 0
last_lcd = 0

while