from machine import Pin, ADC
import time

# Setup ADC for LDR sensor
ldr_sensor = ADC(Pin(26))  # LDR AO connected to GPIO26 (ADC0)

# Setup digital input pin for PIR sensor
pir_sensor = Pin(14, Pin.IN)  # PIR DO connected to GPIO14

# Setup LED on GPIO16
led = Pin(16, Pin.OUT)

# Function to convert ADC reading to lux (simple linear conversion, needs calibration)
def adc_to_lux(adc_value):
    # This is a placeholder conversion. Calibration needed for accurate lux measurement.
    # For example: lux = 1000 / (adc_value / 65535) (Not actual formula)
    return (65535 - adc_value) / 65535 * 1000

# Main loop
while True:
    # Read the analog value from the LDR
    ldr_value = ldr_sensor.read_u16()  # Read ADC value (0 to 65535)
    
    # Convert ADC value to lux
    lux = adc_to_lux(ldr_value)
    
    # Read the digital output from PIR sensor
    pir_value = pir_sensor.value()
    
    # Print sensor values (for debugging)
    print('LDR Light Level (Lux):', lux)
    print('PIR Sensor Output:', pir_value)
    
    # Control LED based on sensor values
    # Turn LED ON if the light level is below a certain threshold or if PIR sensor detects motion
    if lux < 200 or pir_value == 1:  # Adjust lux threshold as needed
        led.value(1)  # Turn LED ON
    else:
        led.value(0)  # Turn LED OFF
    
    time.sleep(1)  # Delay to avoid rapid toggling