import machine
import time

# -------- PINS ----------
ldr = machine.ADC(26)          # LDR connected to ADC0
pir = machine.Pin(16, machine.Pin.IN)  # PIR sensor
led = machine.PWM(machine.Pin(15))     # LED using PWM
led.freq(1000)

# -------- Threshold Values ----------
LDR_THRESHOLD = 25000   # below this = night (adjust based on your LDR)
BRIGHTNESS_NORMAL = 30000   # dim mode
BRIGHTNESS_HIGH = 65000     # full brightness

print("Smart Street Light System Started...\n")

while True:
    ldr_value = ldr.read_u16()
    motion = pir.value()

    if ldr_value < LDR_THRESHOLD:
        # NIGHT
        if motion == 1:
            # Movement detected → full brightness
            led.duty_u16(BRIGHTNESS_HIGH)
            print("Night | Motion Detected | LED High Brightness")
        else:
            # No motion → dim brightness
            led.duty_u16(BRIGHTNESS_NORMAL)
            print("Night | No Motion | LED Dim")
    else:
        # DAY
        led.duty_u16(0)
        print("Daytime | LED OFF")

    time.sleep(0.5)