from machine import Pin, ADC
import time

# Set up the PIR sensor (change GP16 if needed)
pir_sensor = Pin(16, Pin.IN)  # PIR output connected to GP16

# Set up the LDR (using ADC0, which is GP26 on Raspberry Pi Pico)
ldr_sensor = ADC(26)  # LDR connected to ADC0 (GP26)

# Set up the LED or relay
light = Pin(15, Pin.OUT)  # LED or relay connected to GP15

# Define the threshold values
ldr_threshold = 10000  # Adjust based on testing

def read_ldr():
    """Reads the LDR value and returns True if it's dark, False otherwise."""
    light_level = ldr_sensor.read_u16()
    print("LDR Light Level:", light_level)
    return light_level < ldr_threshold

try:
    while True:
        motion_detected = pir_sensor.value()
        is_dark = read_ldr()

        if motion_detected and is_dark:
            print("Motion detected in the dark, turning on light.")
            light.value(1)  # Turn on light
        else:
            print("No motion or it's bright enough, turning off light.")
            light.value(0)  # Turn off light

        time.sleep(1)  # Adjust the delay as needed

except KeyboardInterrupt:
    print("Program stopped")

finally:
    light.value(0)  # Ensure the light is off when the program stops