import machine
import time
from machine import Pin, SoftI2C
from i2c_lcd import I2cLcd



# Calibration constants (replace with your own values)
ANALOG_MIN = 0  # Analog value in complete darkness
ANALOG_MAX = 4095  # Analog value in maximum light
LUX_MIN = 0  # Lux value in complete darkness
LUX_MAX = 1000  # Lux value in maximum light

# Initialize I2C
i2c = SoftI2C(scl=Pin(22), sda=Pin(21), freq=400000)
devices = i2c.scan()

# Check if any I2C devices are connected
if devices:
    # Take the first I2C device found
    device_address = devices[0]
    print("I2C addr: " + hex(device_address))
    lcd = I2cLcd(i2c, device_address, 2, 16)
else:
    print("No I2C devices found!")
    sys.exit()

# Initialize ADC
photo_pin = machine.ADC(13)

while True:
    # Read analog value from the photoresistor
    analog_value = photo_pin.read_u16()

    # Convert analog value to lux using calibration curve
    lux = (analog_value - ANALOG_MIN) * (LUX_MAX - LUX_MIN) / (ANALOG_MAX - ANALOG_MIN) + LUX_MIN

    # Clear the LCD screen
    lcd.clear()

    # Move to the first line and display the lux value
    lcd.move_to(0, 0)
    lcd.putstr("Lux: {:.2f}".format(lux))

    # Print the lux value to the console
    print("Lux:", lux)

    # Wait for a short duration before the next reading
    time.sleep(0.2)

    # Print the lux value to the console
    print("Lux:", lux)

    # Wait for a short duration before the next reading
    time.sleep(0.2)