from machine import Pin, ADC
import time
import math

# Constant
GAMMA = 0.7
RL10 = 50  # Resistance at 10 lux

led1 = Pin(17, Pin.OUT)
led2 = Pin(16, Pin.OUT)
led3 = Pin(15, Pin.OUT) 

state = True

# Configure the LDR pin (ADC channel)
ldr_pin = ADC(Pin(34))  # GPIO 34
ldr_pin.atten(ADC.ATTN_11DB)  # Full-scale voltage 0-3.3V
ldr_pin.width(ADC.WIDTH_12BIT)  # 12-bit resolution (0-4095)

def calculate_lux(analog_value):
    # Convert the analog value into voltage (assuming 12-bit ADC and 3.3V range)
    voltage = analog_value / 4095.0 * 3.3
    # Calculate the resistance of the LDR
    resistance = 2000 * voltage / (1 - voltage / 3.3)
    # Calculate lux value using the formula
    lux = math.pow(RL10 * 1e3 * math.pow(10, GAMMA) / resistance, (1 / GAMMA))/1.808
    return lux

while True:
    # Read the analog value from the LDR
    analog_value = ldr_pin.read()
    # Calculate the lux value
    lux = calculate_lux(analog_value)
    print("Lux:", lux)
    
    # Print lighting condition
    if (lux < 1000):
        print("Oscuro")
        led1.value(state)
        led2.value(not state)
        led3.value(not state)
    elif (lux < 10000):
        print("Parcialmente iluminado")
        led1.value(not state)
        led2.value(state)
        led3.value(not state)
    else:
        print("Totalmente iluminado")
        led1.value(not state)
        led2.value(not state)
        led3.value(state)

    time.sleep(1)