from machine import Pin, ADC
import time

# Define pin for LDR (Light Dependent Resistor) and LED
ldr_pin = 27  # GPIO pin connected to the LDR
led_pin = 1  # GPIO pin connected to the LED

# Initialize ADC for reading analog values from LDR
adc = ADC(Pin(ldr_pin))

# Initialize LED pin as an output
led = Pin(led_pin, Pin.OUT)

# Function to check ambient light level
def check_light_level():
    # Read analog value from LDR
    light_value = adc.read_u16()
    # Convert analog value to a light level (adjust the threshold as needed)
    if light_value > 20000:  # Adjust threshold based on your environment
        return True  # Low light condition
    else:
        return False  # Sufficient light condition

# Main loop
while True:
    # Check ambient light level
    low_light = check_light_level()
    
    # If low light condition detected, turn on the LED
    if low_light:
        led.value(1)  # Turn on the LED
    else:
        led.value(0)  # Turn off the LED
        
    time.sleep(0.5)  # Adjust delay as needed