from machine import Pin, I2C, ADC
import utime
import dht

# Initialize the DHT22 sensor
sensor = dht.DHT22(Pin(16))  # Adjust the pin number according to your connection

# Initialize the LCD
from lcd_api import LcdApi
from pico_i2c_lcd import I2cLcd

I2C_ADDR = 0x27  # I2C address of the LCD
i2c = I2C(1, scl=Pin(15), sda=Pin(14), freq=400000)  # Adjust the pins according to your setup
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)

# Initialize the buzzer, motor, and LED
buzzer = Pin(26, Pin.OUT)  # Adjust the pin numbers according to your setup
motor = Pin(26, Pin.OUT)
led = Pin(27, Pin.OUT)

# Initialize the potentiometer
potentiometer = ADC(Pin(28))  # Adjust the pin number according to your setup

# Temperature limits
upperLimit = 30  # Default upper temperature limit
lowerLimit = 20  # Default lower temperature limit

def update_lcd(temperature, humidity):
    lcd.clear()
    lcd.putstr("Temp: {} C\nHumidity: {}%".format(temperature, humidity))

def map_value(value, in_min, in_max, out_min, out_max):
    return (value - in_min) * (out_max - out_min) // (in_max - in_min) + out_min

while True:
    # Read temperature and humidity from DHT22 sensor
    try:
        sensor.measure()
        temperature = sensor.temperature()
        humidity = sensor.humidity()
    except OSError as e:
        print('Failed to read sensor.')

    # Read the potentiometer value
    pot_value = potentiometer.read_u16()
    pot_value_mapped = map_value(pot_value, 0, 65535, 10, 40)  # Map the potentiometer value to temperature range

    # Update the LCD display
    update_lcd(temperature, humidity)

    # Control devices based on temperature
    if temperature > upperLimit:
        buzzer.value(1)
        motor.value(1)
        led.value(0)
    elif temperature < lowerLimit:
        buzzer.value(0)
        motor.value(0)
        led.value(1)
    else:
        buzzer.value(0)
        motor.value(0)
        led.value(0)

    # Adjust temperature limits based on potentiometer value
    upperLimit = pot_value_mapped + 5  # Add some buffer
    lowerLimit = pot_value_mapped - 5  # Add some buffer

    utime.sleep(1)