#include <OneWire.h>
#include <DallasTemperature.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define DS18B20 2
#define OLED_RESET 4
#define azul 6
#define vermelho 4

Adafruit_SSD1306 display(OLED_RESET);
OneWire oneWire(DS18B20);
DallasTemperature Sensor(&oneWire);

float valorTemperatura;
float valorAnterior = -100;

void setup()
{
  // put your setup code here, to run once:
  Serial.begin(115200);

  Sensor.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

  Serial.println("Lendo temperatura");

  pinMode(azul, OUTPUT);
  pinMode(vermelho, OUTPUT);

  delay(250);
}

void loop()
{
  Sensor.requestTemperatures();
  valorTemperatura = Sensor.getTempCByIndex(0);

  if(valorTemperatura != valorAnterior)
  {
    valorAnterior = valorTemperatura;
    Serial.print("Temperatura: ");
    Serial.println(valorTemperatura);

    if(valorTemperatura < 30)
    {
        digitalWrite(azul, HIGH);
        digitalWrite(vermelho, LOW);
    }
    else
    {
        digitalWrite(azul, LOW);
        digitalWrite(vermelho, HIGH);
    }

    display.clearDisplay();
    display.setTextColor(WHITE);
    display.setTextSize(1);
    display.setCursor(0, 0);
    display.print("Trabalho PIA III");
    display.drawLine(0, 10, 128, 10, SSD1306_WHITE);
    display.setCursor(0, 15);
    display.print("Temp: ");
    display.print(valorTemperatura);
    display.print(" C");
  }

  display.display();

  delay(1000); // this speeds up the simulation
}