from machine import Pin, ADC, PWM
from picozero import PWMLED
from utime import sleep
from math import pow

led1 = PWMLED(15)
light_sensor1 = ADC(26)

led2 = PWMLED(17)
light_sensor2 = ADC(27)

GAMMA = 0.7
RL10 = 50
ADC_VREF = 3.3

#function to convert ADC reading to illumentation (LUX)
def calc_lux(reading):
    ldrVoltage = reading / 65536 * ADC_VREF
    ldrResistance = 10000 * ldrVoltage / (1 - ldrVoltage / ADC_VREF)
    print (ldrResistance)
    ldrLux = 5*pow(RL10 * 1000 * pow(10, GAMMA) / ldrResistance, (1 / GAMMA));
    return ldrLux

while True:
    reading = light_sensor1.read_u16()
    lux = calc_lux(reading)
    print(lux)
    if (lux > 250):
        led1.brightness = 512
    else:
        led1.off()

    reading = light_sensor2.read_u16()
    lux = calc_lux(reading)
    print(lux)
    if (lux > 250):
        led2.brightness = 512
    else:
        led2.off()
    sleep(1)