from machine import ADC, Pin
from time import sleep

# GP26 is ADC0 for LDR input
ldr = ADC(26)

# GP16 is used for LED output
led = Pin(3, Pin.OUT)

while True:
    value = ldr.read_u16()  # Range: 0 (dark) to 65535 (bright)
    voltage = value * 3.3 / 65535

    print("LDR Value:", value, "| Voltage:", round(voltage, 2), "V")

    if value < 10000:
        print(" It's dark!")
        led.on()  # Turn on LED when it's dark
    else:
        print(" It's bright!")
        led.off()  # Turn off LED when it's bright

    sleep(1)