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

#define WIDTH 128
#define HEIGHT 64

Adafruit_SSD1306 oled(WIDTH, HEIGHT, &Wire, -1);

const int DHT_PIN = 15;

DHTesp dhtSensor;

void setup() {
  Serial.begin(9600);

  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("gagal untuk memulai OLED"));
    while (true);
  }

  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
}

void loop() {
  delay(2000);
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  
  float temp = data.temperature;
  float hum = data.humidity;

  if (isnan(hum) || isnan(temp)) {
    oled.clearDisplay();
    oled.setTextSize(1); oled.setTextColor(WHITE); 
    oled.setCursor(0, 10);
    oled.println("Pembacaan sensor");
    oled.println();
    oled.print("DHT gagal!");
    oled.display();
    Serial.println(F("Pembacaan sensor DHT gagal!"));
    return;
  }

  oled.clearDisplay();
  oled.setTextSize(1); oled.setTextColor(WHITE); 
  oled.setCursor(0, 10);

  oled.print("Hum.: ");
  oled.print(hum);
  oled.print("%");
  if (hum < 20) {
    oled.print(" !!!!!");
  }

  oled.println(); oled.println();

  oled.print("Temp: ");
  oled.print(temp);
  oled.print("C");
  if (temp > 30) {
    oled.print(" !!!!!");
  }

  oled.display();

  Serial.print("Kelembapan: ");
  Serial.print(hum);
  Serial.print("% \tSuhu: ");
  Serial.print(temp);
  Serial.print("℃");
  Serial.println();
}