#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include "DHT.h"

// === Konfigurasi Pin & Sensor ===
#define DHTPIN 4        // Pin data DHT11
#define DHTTYPE DHT11   // Tipe sensor
DHT dht(DHTPIN, DHTTYPE);

// === Konfigurasi OLED SSD1306 ===
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// === Wi-Fi Credentials ===
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// === ThingSpeak API ===
const char* serverName = "http://api.thingspeak.com/update";
const char* apiKey = "55010CAC4JCMFECE"; // Ganti dengan API Key kamu

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

    // Wi-Fi
      WiFi.begin(ssid, password);
        while (WiFi.status() != WL_CONNECTED) {
            delay(500);
                Serial.println("Connecting to Wi-Fi...");
                  }
                    Serial.println("Connected to Wi-Fi");

                      // DHT
                        dht.begin();

                          // OLED
                            if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3c)) {
                                Serial.println("SSD1306 allocation failed!");
                                    while (1);
                                      }
                                        display.clearDisplay();
                                          display.display();
                                          }

                                          void loop() {
                                            // Baca data dari DHT11
                                              float temperature = dht.readTemperature();
                                                float humidity = dht.readHumidity();

                                                  // Cek apakah sensor valid
                                                    if (isnan(temperature) || isnan(humidity)) {
                                                        Serial.println("Gagal membaca sensor DHT11!");
                                                            return;
                                                              }

                                                                // Tampilkan di Serial Monitor
                                                                  Serial.print("Temperature: ");
                                                                    Serial.print(temperature);
                                                                      Serial.println(" °C");
                                                                        Serial.print("Humidity: ");
                                                                          Serial.print(humidity);
                                                                            Serial.println(" %");

                                                                              // Tampilkan di OLED
                                                                                display.clearDisplay();
                                                                                  display.setTextSize(1);
                                                                                    display.setTextColor(SSD1306_WHITE);
                                                                                      display.setCursor(0, 0);
                                                                                        display.print("Temp: ");
                                                                                          display.print(temperature);
                                                                                            display.println(" C");
                                                                                              display.print("Humidity: ");
                                                                                                display.print(humidity);
                                                                                                  display.println(" %");
                                                                                                    display.display();

                                                                                                      // Kirim data ke ThingSpeak
                                                                                                        if (WiFi.status() == WL_CONNECTED) {
                                                                                                            HTTPClient http;
                                                                                                                String url = String(serverName) + "?api_key=" + apiKey +
                                                                                                                                 "&field1=" + String(temperature) +
                                                                                                                                                  "&field2=" + String(humidity);

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

                                                                                                                                                              if (httpResponseCode > 0) {
                                                                                                                                                                    Serial.print("Data sent. Response code: ");
                                                                                                                                                                          Serial.println(httpResponseCode);
                                                                                                                                                                              } else {
                                                                                                                                                                                    Serial.print("Error sending data. HTTP code: ");
                                                                                                                                                                                          Serial.println(httpResponseCode);
                                                                                                                                                                                              }
                                                                                                                                                                                                  http.end();
                                                                                                                                                                                                    } else {
                                                                                                                                                                                                        Serial.println("Wi-Fi disconnected!");
                                                                                                                                                                                                          }

                                                                                                                                                                                                            delay(20000); // Tunggu 20 detik (ThingSpeak limit 15 detik)
                                                                                                                                                                                                            }