/*************************************************
 * LATIHAN 2 – Dual Cloud
 * ESP32 + DHT22 + OLED + 2 LED
 *************************************************/

#define BLYNK_PRINT Serial

// ===== BLYNK =====
#define BLYNK_TEMPLATE_ID "TMPL6dB9eXaFt"
#define BLYNK_TEMPLATE_NAME "Latihan DHT22 Naila Darussalamah"
#define BLYNK_AUTH_TOKEN "XYGwvHZS7chjU0jIZh-mpCkXjl6nSyT1"

// ===== INCLUDE =====
#include <WiFi.h>
#include <HTTPClient.h>
#include <BlynkSimpleEsp32.h>
#include <DHTesp.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// ===== WIFI =====
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// ===== THINGSPEAK =====
String tsServer = "http://api.thingspeak.com/update";
String tsApiKey = "GADKOUR215F9HB1ZK";

// ===== PIN =====
#define DHT_PIN    15
#define LED_BLYNK  2
#define LED_TS     4

// ===== OLED =====
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// ===== OBJECT =====
DHTesp dht;
BlynkTimer timer;

float temperature, humidity;

// ===== KIRIM KE BLYNK =====
void sendBlynk() {
  Blynk.virtualWrite(V0, temperature);
  Blynk.virtualWrite(V1, humidity);

  digitalWrite(LED_BLYNK, HIGH);
  delay(100);
  digitalWrite(LED_BLYNK, LOW);
}

// ===== KIRIM KE THINGSPEAK =====
void sendThingSpeak() {
  HTTPClient http;

  String url = tsServer +
               "?api_key=" + tsApiKey +
               "&field1=" + String(temperature) +
               "&field2=" + String(humidity);

  http.begin(url);
  int httpCode = http.GET();

  if (httpCode == 200) {
    digitalWrite(LED_TS, HIGH);
    delay(100);
    digitalWrite(LED_TS, LOW);
  }

  http.end();
}

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

  pinMode(LED_BLYNK, OUTPUT);
  pinMode(LED_TS, OUTPUT);

  dht.setup(DHT_PIN, DHTesp::DHT22);

  Wire.begin(21, 22);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(2000L, []() {
    TempAndHumidity data = dht.getTempAndHumidity();
    if (isnan(data.temperature)) return;

    temperature = data.temperature;
    humidity = data.humidity;

    // OLED
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(WHITE);
    display.setCursor(0, 0);
    display.println("LATIHAN 2");
    display.print("Temp: ");
    display.print(temperature);
    display.println(" C");
    display.print("Hum : ");
    display.print(humidity);
    display.println(" %");
    display.display();

    sendBlynk();
  });

  timer.setInterval(15000L, sendThingSpeak);
}

void loop() {
  Blynk.run();
  timer.run();
}