# reference: https://wokwi.com/projects/377926870010444801
#            https://wokwi.com/projects/370257513012246529

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

GAMMA = 0.7;
RL10 = 85;


LDR = ADC(Pin(26))


led_pin = Pin(18, Pin.OUT)  # Assuming GPIO Pin 18 is connected to the LED via replay

while True:

    # Convert the analog value into lux value:
    # For Raspberry Pi Pico in MicroPython, this can range from 0 to 65025. 
    analogValue = LDR.read_u16()
    voltage = analogValue / 65025 * 3.3
    resistance = 5000 * voltage / (1 - voltage / 3.3)
    lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA))
    print("lux = ", lux)

    if lux < 100:
        led_pin.off()  # Turn off LED
    else:
        led_pin.on()   # Turn on LED

    sleep(2)