from time import sleep
import dht 
from machine import ADC, Pin, PWM
import math
buzzer_pin = Pin(14, Pin.OUT)


buzzer_pwm = PWM(buzzer_pin)
teplomer = dht.DHT22(Pin(32))
adc = ADC(Pin(27))  
adc.atten(ADC.ATTN_11DB)  
led= Pin(26, Pin.OUT)
led1= Pin(25, Pin.OUT)

rl10 = 50e3     #LDR resistance at 10lux
gamma = 0.7     #log(Ra/Rb) / log(La/Lb) 



def calculate_resistance():
    value = adc.read()
    voltage_ratio = value / (4095 - value) 
    return 10e3 * voltage_ratio

#R = R_10 * (lux / 10) ^ -γ => R10/​R​=(10/lux​)^−γ => R/R10​​=(10/lux​)^γ => (R10​​/R)^(1/γ​)=10/lux​ => lux=10*(R10/R​​)^(1/γ)​
def calculate_lux(odpor):
  return 10 * math.pow(rl10/odpor, 1/gamma)

while True:

    
    odpor = calculate_resistance()  
    teplomer.measure()
    temp = teplomer.temperature()
    hum = teplomer.humidity()
    print('Temperature: %3.1f C' %temp)
    print('Humidity: %3.1f %%' %hum)
    resistance = calculate_resistance()
    lux=round(calculate_lux(resistance),1)
    if lux >= 1000 or temp>=50:
        led.value(1)
        sleep(5)
        led.value(0)
        buzzer_pwm.duty(50)
    else:
        buzzer_pwm.duty(0)