from machine import ADC, Pin
import time

ldr = ADC(26)        # ADC0 on GP26
led = Pin(15, Pin.OUT)
threshold = 30000    # example threshold; adjust after observing readings

while True:
    light_value = ldr.read_u16()   # 0..65535
    print("Light Intensity:", light_value)
    if light_value < threshold:
        led.value(1)   # low light -> LED ON
    else:
        led.value(0)
    time.sleep(1)