from machine import ADC, Pin, I2C
import utime
from pico_i2c_lcd import I2cLcd
import tm1637

# Initialize I2C using GPIO 26 (SDA) and GPIO 27 (SCL)
i2c = I2C(id=0, scl=Pin(9), sda=Pin(8), freq=100000)

# Initialize the LCD
lcd = I2cLcd(i2c, 0x27, 2, 16)

# Sensor and SetPoint Inputs
AnalogIn = ADC(0)  # GP26 - Sensor input (TMP36 or LM35)
SetPoint = ADC(1)  # GP27 - Setpoint adjustment (potentiometer)

# Conversion Constants
Conv = 3300 / 65535
Conv1 = 150 / 3300  # Conversion factor

# Output Pins
LED = Pin(15, Pin.OUT)
Relay = Pin(16, Pin.OUT)
LED.value(0)
Relay.value(0)

while True:
    # Read and convert setpoint value
    ValorPot = SetPoint.read_u16()
    TempSP = Conv * ValorPot
    SetTemp = TempSP * Conv1

    # Read and convert sensor value
    V = AnalogIn.read_u16()
    mV = V * Conv
    RoomTemp = (mV - 500.0) / 10.0  # For TMP36, T = (Vo - 500) / 10
    
    # Display values on the LCD
    lcd.clear()
    lcd.move_to(0, 0)
    lcd.putstr('Temp: {:.2f} C'.format(RoomTemp))
    lcd.move_to(0, 1)
    lcd.putstr('Set: {:.2f} %'.format(SetTemp))
    
    # Control Relay and LED based on temperature comparison
    if RoomTemp < SetTemp:
        Relay.value(1)
        LED.value(1)
    else:
        Relay.value(0)
        LED.value(0)
    
    utime.sleep(1)