# IMPORTS
from machine import Pin, ADC, I2C
from picozero import Speaker
from time import sleep
from math import log

# PINS
motion = Pin(15, Pin.OUT)
led1 = Pin(2, Pin.OUT)
ntc = ADC(Pin(27))
ldr = ADC(Pin(26))
mq2 = ADC(Pin(28))
led2 = Pin(6, Pin.OUT)
led3 = Pin(10, Pin.OUT)
buzzer = Speaker(13)
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)

while True:
    sleep(0.02) # A short delay to let the simulation start
    BETA = 3950 
    analogValue = ntc.read_u16()
    celsius = round(1 / (log(1 / (65535. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15)

    GAMMA = 0.7
    RL10 = 50
    analogValue2 = ldr.read_u16()
    voltage = analogValue2 / 65535. * 5
    resistance = 2000 * voltage / (1 - voltage / 5)
    lux = round(pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA)))
    # Analog Value Conversion
    
    if motion.value():
        led1.on()
        #print("Motion detected")
    else:
        led1.off() # Red led turns off if motion has stopped
        #print("Motion stopped")

    if lux >= 500:
        led3.off()
        #print("Light")
    else:
        led3.on()
        #print("Dark")
    #print(f"Temperature is {celsius}°C")
    if mq2.read_u16() >= 58654:
        #print("Smoke: Detected")
        buzzer.on()
    else:
        #print("Smoke: 0")
        buzzer.off()
    print("")
    if celsius >= 35:
        led2.on() # On if temperature is greater than or equal to 35
    else:
        led2.off() # Off if temperature is less than 35
    sleep(2)