import time
import machine
from math import pow

GAMMA = 0.7;
RL10 = 50;

LDR = machine.ADC (machine. Pin (28))
led = machine. Pin(27, machine.Pin.OUT)


def main():

    while True:

        adc_value= LDR.read_u16()
        voltage = 5*(adc_value / 2**16)
        resistance = 2000* voltage/(1 - voltage / 5);
        lux = pow(RL10 *1e3 * pow(10, GAMMA) / resistance, (1/ GAMMA));
        print("ADC Value" , "ade value" , "Lux", lux) 

        if lux > 5000:
            led.value(0)

        else:

            led.value(1)
            time.sleep(0.5)

if __name__ == '__main__':
    main()