from machine import Pin, I2C
import time
import lcd_api  # Library for LCD API
import pico_i2c_lcd # Library for I2C LCD control on Pico

# I2C setup for LCD
I2C_ADDR = 0x27  # I2C address of the LCD (change if different)
I2C_NUM_ROWS = 2  # Number of rows on the LCD
I2C_NUM_COLS = 16 # Number of columns on the LCD

# Define ADC pin for temperature sensor
adcpin = 4
sensor = machine.ADC(adcpin)

# Function to read temperature from the sensor
def ReadTemperature():
    adc_value = sensor.read_u16()  # Read raw ADC value
    volt = (3.3 / 65535) * adc_value  # Convert ADC value to voltage
    temperature = 27 - (volt - 0.706) / 0.001721  # Convert voltage to temperature (Celsius)
    return round(temperature, 1)  # Round to 1 decimal place

# Initialize I2C communication (I2C0, SDA on GP4, SCL on GP5, 400kHz frequency)
i2c = I2C(0, sda=Pin(4), scl=Pin(1), freq=400000)

# Create LCD object using the I2C connection and LCD parameters
lcd = pico_i2c_lcd.I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)

# Read temperature from the sensor
temperature = ReadTemperature()

# Define heart shape (5x8 pixel matrix)
heart = [
    0b00000,  # .....
    0b01010,  # .X.X.
    0b11111,  # XXXXX
    0b11111,  # XXXXX
    0b01110,  # .XXX.
    0b00100,  # ..X..
    0b00000,  # .....
    0b00000   # .....
]

# Load custom character into CGRAM at position 0 -> "x00" where the heart shape is stored
lcd.custom_char(0, heart)   # stores the heart at CGRAM position 0 (x00)

# Print to the LCD display (uses custom character)
lcd.putstr("I \x00 Pico\n") # Displays "I ♥ Pico"
#time.sleep(2)         # Wait for 2 seconds
#lcd.clear()            # Clear the LCD

# Display temperature with degree symbol on LCD
lcd.putstr(f"Temp: {temperature} " + chr(223) + "C")

# Print to the console (this is what should appear in the LCD Display)
print("I ♥ Pico")
print(f"Temp: {temperature} °C")