#define PIN_ANALOG_IN 2    
#define LED_VERDE 33       
#define LED_AMARELO 32    
#define LED_VERMELHO 26    
#define LED_AZUL 25       

#include <Wire.h>
#include <LiquidCrystal_I2C.h>


LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  Serial.begin(115200); 

  
  Wire.begin(16, 17);   

  
  lcd.init();
  lcd.backlight();      

  pinMode(LED_VERDE, OUTPUT);
  pinMode(LED_AMARELO, OUTPUT);
  pinMode(LED_VERMELHO, OUTPUT);
  pinMode(LED_AZUL, OUTPUT);

}

void loop() {
  int adcValue = analogRead(PIN_ANALOG_IN);
  double voltage = adcValue * 3.3 / 4095.0;
  double Rt = 10 * voltage / (3.3 - voltage);


  double tempK = 1 / (1 / 298.15 + log(Rt / 10) / 3950.0);
  double tempC = tempK - 273.15;

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(tempC, 1);
  lcd.print(" C");

  if (tempC > 10 && tempC <= 30) {
    digitalWrite(LED_VERDE, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("LED Verde aceso");
  } else if (tempC > 30 && tempC <= 40) {
    digitalWrite(LED_AMARELO, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("LED Amarelo aceso");
  } else if (tempC > 40) {
    digitalWrite(LED_VERMELHO, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("LED Vermelho aceso");
  } else {
    digitalWrite(LED_AZUL, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("LED Azul aceso");
  }

 
  digitalWrite(LED_VERDE, (tempC > 10 && tempC <= 30) ? HIGH : LOW);
  digitalWrite(LED_AMARELO, (tempC > 30 && tempC <= 40) ? HIGH : LOW);
  digitalWrite(LED_VERMELHO, (tempC > 40) ? HIGH : LOW);
  digitalWrite(LED_AZUL, (tempC <= 10) ? HIGH : LOW);

  delay(1000); 
}