"""
Project :Building a Temperature Monitoring System using
 Raspberry Pi Pico, DHT22 Sensor, 
and I2C LCD Display

The goal of this project is to create a temperature
 monitoring system that utilizes a DHT22 sensor to 
 measure the temperature and a Raspberry Pi Pico 
 microcontroller to read the data and display it 
 on an I2C LCD display.
"""
from machine import I2C, Pin
from time import sleep
from dht import DHT22
from pico_i2c_lcd import I2cLcd

def initialize_i2c_lcd(sda_pin, scl_pin, i2c_freq):
    """Initialize the I2C LCD display with the given parameters."""
    i2c_bus = I2C(0, sda=Pin(sda_pin), scl=Pin(scl_pin), freq=i2c_freq)
    i2c_address = i2c_bus.scan()[0]
    return I2cLcd(i2c_bus, i2c_address, 2, 16), i2c_address

def display_temperature(lcd):
    """Read the temperature from DHT22 sensor and display it on the LCD."""
    dht_sensor = DHT22(Pin(7))
    lcd.clear()
    lcd.putstr("Temperature:")
    while True:
        dht_sensor.measure()
        temp = dht_sensor.temperature()
        if isinstance(temp, float):
            lcd.move_to(0, 1)
            lcd.putstr("{:.1f} C".format(temp))
        sleep(1)

def main():
    """Main function to run the I2C LCD display example."""
    lcd_display, _ = initialize_i2c_lcd(sda_pin=0, scl_pin=1, i2c_freq=400000)
    display_temperature(lcd_display)

if __name__ == '__main__':
    main()