from machine import Pin, PWM, ADC
from utime import sleep


                   # 1st WAY 
# --- Setup Pins ---
servo = PWM(Pin(22), freq=50)  # Servo motor on Pin 22
ldr = ADC(Pin(26))            # Light sensor on Pin 26
led = Pin(0, Pin.OUT)          # LED indicator on Pin 0

# --- Move Servo ---
def set_angle(angle):
    # Convert angle (0-180) to duty cycle for MicroPython
    duty = int(1638 + (angle / 180) * 6554)
    servo.duty_u16(duty)

# --- Main Loop ---
while True:
    light = ldr.read_u16()     # Read light level (0 to 65535)
    
    if light > 30000:          # If light is bright -> Open
        set_angle(0)
        led.value(0)           # Turn LED OFF during the day
        print("☀️ Bright! Opening blinds...")

    else:                      # If light is dark -> Close
        set_angle(90)
        led.value(1)           # Turn LED ON at night
        print("🌙 Dark! Closing blinds...")
        
    sleep(1)                   # Wait 1 second before checking again













#======================================================================================
                       # 2nd WAY
# #----- Hardware Setup------
# ldr = ADC(Pin(26))  # LDR on ADC0 (GP26)
# led = Pin(0, Pin.OUT)
# servo =PWM(Pin(22))
# servo.freq(50)  # SG90 servo runs at 50Hz

# # --- Configuration Thresholds (Tune these based on your room's lighting) ---
# LIGHT_OPEN = 35000       # Above this = open blinds (bright)
# LIGHT_CLOSE = 25000      # Below this = close blinds (dark)

# ANGLE_OPEN = 0           # Servo angle when blinds OPEN
# ANGLE_CLOSE = 90         # Servo angle when blinds CLOSED

# # --- Helper: Set servo angle ---
# def set_angle(angle):
#     # SG90: 0.5ms to 2.5ms pulse width
#     pulse = 0.5 + (angle / 180.0) * 2.0
#     duty = int((pulse / 20.0) * 65535)
#     servo.duty_u16(duty)

# # --- Helper: Read light level (0-65535) ---
# def read_light():
#     return ldr.read_u16()

# # --- Main loop with hysteresis ---
# state = None  # 'open' or 'close'

# # Start Closed
# set_angle(ANGLE_CLOSE)
# state = 'closed'
# while True:
#     light = read_light()
#     print("Light Level: ", light)

#     # Bright -> Open blinds
#     if light > LIGHT_OPEN and state != 'open':
#         print("☀️ Bright! Opening blinds...")
#         set_angle(ANGLE_OPEN)
#         state = 'open'
#         led.value(0)
    
#     # Dark -> Close blinds
#     elif light < LIGHT_CLOSE and state != 'closed':
#         print("🌙 Dark! Closing blinds...")
#         set_angle(ANGLE_CLOSE)
#         state = 'closed'
#         led.value(1)

#     sleep(0.3)
# #=============================================================================