import machine
import utime
# Pin setup for Raspberry Pi Pico
PIR_PIN = machine.Pin(17, machine.Pin.IN)  # PIR sensor on GPIO 17
RELAY_PIN = machine.Pin(8, machine.Pin.OUT)  # Relay control on GPIO 27
LDR_PIN = machine.ADC(28)  # LDR connected to ADC pin (GPIO 26)
# Function to read LDR value
def read_ldr():
    # Read the analog value from the LDR
    ldr_value = LDR_PIN.read_u16()
    return ldr_value
# Main loop
try:
    while True:
        # Check if motion is detected by PIR sensor
        if PIR_PIN.value() == 1:  # Motion detected
            print("Motion Detected!")
            # Read LDR value to check light level
            light_level = read_ldr()
            print("LDR value:", light_level)
            # If the light level is below a threshold (dark), turn on the light
            if light_level < 30000:  # Adjust threshold as needed
                print("It's dark, turning ON the light.")
                RELAY_PIN.on()  # Turn on the light
            else:
                print("It's bright, keeping the light OFF.")
                RELAY_PIN.off()  # Turn off the light
        else:
            print("No motion detected, keeping the light OFF.")
            RELAY_PIN.off()  # Turn off the light when no motion is detected
        utime.sleep(1)  # Wait for 1 second before checking again
except KeyboardInterrupt:
    print("Program terminated.")
    RELAY_PIN.off()  # Turn off the light on exit