#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <DHT.h>

#define SCREEN_WIDTH 128  // OLED display width
#define SCREEN_HEIGHT 64  // OLED display height

#define DHTPIN 15   // Pino do sensor DHT11
#define DHTTYPE DHT11  // Tipo do sensor DHT11

#define POT_PIN 34   // Pino do potenciômetro
#define RELAY_NO_PIN 19  // Pino do relé NO
#define RELAY_NC_PIN 18  // Pino do relé NC
#define BUZZER_PIN 25   // Pino do buzzer

#define SCL_PIN 22   // Pino SCL
#define SDA_PIN 21  // Pino SDA

DHT dht(DHTPIN, DHTTYPE);
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Wire.begin();
  Serial.begin(9600);
  
  pinMode(RELAY_NO_PIN, OUTPUT);
  pinMode(RELAY_NC_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  dht.begin();
  
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 0);
  display.println("Eletronica");
  display.println("Bem-vindo");
  display.println("Etec - 2024");
  display.display();
  delay(2000);
}

void loop() {
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  int potValue = analogRead(POT_PIN);
  float tempRef = map(potValue, 0, 4095, -40, 80);

  Serial.print("Valor do potenciometro: ");
  Serial.println(potValue);
  Serial.print("Temperatura de referencia: ");
  Serial.println(tempRef);

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Erro ao ler o sensor DHT11!");
    return;
  }

  Serial.print("Temperatura atual: ");
  Serial.println(temperature);
  Serial.print("Umidade atual: ");
  Serial.println(humidity);

  if (temperature >= tempRef) {
    digitalWrite(RELAY_NO_PIN, HIGH);
    digitalWrite(RELAY_NC_PIN, LOW);
    tone(BUZZER_PIN, 660);
  } else {
    digitalWrite(RELAY_NO_PIN, LOW);
    digitalWrite(RELAY_NC_PIN, HIGH);
    noTone(BUZZER_PIN);
  }

  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("Temp. Ref.: ");
  display.print(tempRef);
  display.println(" C");
  display.print("Temp. Atual: ");
  display.print(temperature);
  display.println(" C");
  display.print("Umidade: ");
  display.print(humidity);
  display.println(" %");
  display.display();

  // Scanner I2C para verificar conexão
  Wire.beginTransmission(0);
  if (Wire.endTransmission() == 0) {
    Serial.println("I2C device found!");
  } else {
    Serial.println("I2C device not found!");
  }

  delay(1000);
}