#define BLYNK_TEMPLATE_ID "TMPL6Tk813SpL"
#define BLYNK_TEMPLATE_NAME "Latihan2"
#define BLYNK_AUTH_TOKEN "7O_cnLxMc9B7XJdilxKU1WYR_mRVdlj4"

#include <WiFi.h>
#include <HTTPClient.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include "DHTesp.h"
#include <BlynkSimpleEsp32.h>

// ================== KONFIGURASI ==================
const char* ssid     = "Wokwi-GUEST";
const char* password = "";

// ThingSpeak
String writeApiKey = "RMYHNKHF6YMTWTAK";
String serverUrl   = "https://api.thingspeak.com/update";


#define BLYNK_TEMPLATE_ID "TMPL6Tk813SpL"
#define BLYNK_TEMPLATE_NAME "Latihan2"
#define BLYNK_AUTH_TOKEN "7O_cnLxMc9B7XJdilxKU1WYR_mRVdlj4"

// PIN
#define LED_BLYNK     2   // LED hijau
#define LED_TS        4   // LED biru
#define DHT_PIN       15

// OLED
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1

// INTERVAL
#define INTERVAL_BLYNK     2000   // 2 detik
#define INTERVAL_TS      15000   // 15 detik

// ================== OBJEK ==================
DHTesp dht;
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

unsigned long lastBlynk = 0;
unsigned long lastTS    = 0;

// ================== SETUP ==================
void setup() {
  Serial.begin(115200);

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

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

  // OLED
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);

  // WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(300);
  }

  // Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, password);
}

// ================== LOOP ==================
void loop() {
  Blynk.run();

  unsigned long now = millis();

  TempAndHumidity data = dht.getTempAndHumidity();
  if (isnan(data.temperature) || isnan(data.humidity)) return;

  // ===== BLYNK (2 detik) =====
  if (now - lastBlynk >= INTERVAL_BLYNK) {
    lastBlynk = now;

    Blynk.virtualWrite(V0, data.temperature);
    Blynk.virtualWrite(V1, data.humidity);

    digitalWrite(LED_BLYNK, HIGH);
    delay(80);
    digitalWrite(LED_BLYNK, LOW);

    display.clearDisplay();
    display.setCursor(0,0);
    display.printf("T: %.2f C\n", data.temperature);
    display.printf("H: %.2f %%\n", data.humidity);
    display.println("Blynk: SUCCESS");
    display.display();
  }

  // ===== THINGSPEAK (15 detik) =====
  if (now - lastTS >= INTERVAL_TS) {
    lastTS = now;

    String url = serverUrl +
               "?api_key=" + writeApiKey +
               "&field1=" + String(data.temperature, 2) +
               "&field2=" + String(data.humidity, 2);

    HTTPClient http;
    http.begin(url);
    int code = http.GET();
    String payload = http.getString();
    http.end();

    bool sendOK = false;
    if (code > 0 && payload.toInt() > 0) sendOK = true;

    if (sendOK) {
      digitalWrite(LED_TS, HIGH);
      delay(80);
      digitalWrite(LED_TS, LOW);
    }

    display.clearDisplay();
    display.setCursor(0,0);
    display.printf("T: %.2f C\n", data.temperature);
    display.printf("H: %.2f %%\n", data.humidity);
    display.println("ThingSpeak:");
    display.println(sendOK ? "SUCCESS" : "FAILED");
    display.display();

    Serial.println("====================");
    Serial.println(url);
    Serial.print("HTTP: "); Serial.println(code);
    Serial.print("RESP: "); Serial.println(payload);
  }
}