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

GAMMA = 0.7;
RL10 = 85;

adc = ADC(Pin(15))
adc.width(10)
while(True):

  #Convert the analog value into lux value:
  analogValue = adc.read()
  voltage = analogValue / 1024. * 3.3
  resistance = 5000 * voltage / (1 - voltage / 3.3)
  lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA))
  print("lux= " ,lux)
  sleep(2)