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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

DHT dht(14,DHT22);
int red = 4;
int blue = 5;
int buzzer = 12;
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  dht.begin();

  pinMode(red, OUTPUT);
  pinMode(blue, OUTPUT);

   if(!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("oled failed"));
    while(1);
  }
  ledcAttachPin(buzzer, 0);

}

void loop() {
  float temp = dht.readTemperature();
  float hum = dht.readHumidity();

  if (temp >= 50) {
    digitalWrite(blue, LOW);
    digitalWrite(red, HIGH);
    delay(500);
    digitalWrite(red, LOW);

    oled.clearDisplay();

    oled.setTextSize(1);
    oled.setTextColor(WHITE);
    oled.setCursor(0, 2);

    oled.print("Suhu: ");
    oled.println(temp);
    oled.print("Kelembapan: ");
    oled.println(hum);
    oled.display();

    ledcWriteNote(0, NOTE_F, 4);
    Serial.println("HOT");
  } else {
    digitalWrite(red, LOW);
    digitalWrite(blue, HIGH);
    delay(500);
    digitalWrite(blue, LOW);

    oled.clearDisplay();

    oled.setTextSize(1);
    oled.setTextColor(WHITE);
    oled.setCursor(0, 2);

    oled.print("Suhu: ");
    oled.println(temp);
    oled.print("Kelembapan: ");
    oled.println(hum);
    oled.display();

    ledcWriteNote(0, NOTE_A, 4);
    Serial.println("COLD");
  }

}