#include <Wire.h>
#include <LiquidCrystal.h>
#include <DHT.h>
#include <WiFi.h>
#include <HTTPClient.h>

// Pin definitions
#define DHTPIN 4
#define DHTTYPE DHT22
#define TRIG_PIN 5
#define ECHO_PIN 18  // Mendeklarasikan pin ECHO_PIN

// WiFi credentials
const char *ssid = "Wokwi-GUEST"; // Gantilah dengan SSID WiFi Anda
const char *password = "";        // Gantilah dengan password WiFi Anda

// ThingSpeak settings
const char *serverUrl = "https://api.thingspeak.com/update";  // Gunakan HTTPS
const char *apiKey = "355BB8BN1EDG4II2"; // Gantilah dengan API Key Anda

// ThingSpeak read API settings
const char *readUrl = "https://api.thingspeak.com/channels/2795468/feeds.json?api_key=IJ9ECNXQFCWNM7F7&results=2";  // Gunakan HTTPS

// Sensor and LCD objects
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal lcd(15, 2, 14, 27, 26, 25);

void setup()
{
  Serial.begin(115200);
  dht.begin();
  lcd.begin(16, 2);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);  // Menggunakan ECHO_PIN

  // Connect to WiFi
  WiFi.begin(ssid, password);
  Serial.println("Connecting to WiFi...");
  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 20)
  {
    delay(1000);
    Serial.print(".");
    attempts++;
  }

  if (WiFi.status() == WL_CONNECTED)
  {
    Serial.println("\nConnected to WiFi");
    Serial.print("IP Address: ");
    Serial.println(WiFi.localIP());
  }
  else
  {
    Serial.println("\nFailed to connect to WiFi");
  }
}

void loop()
{
  // Read sensor data
  float Humidity = dht.readHumidity();
  float Temperature = dht.readTemperature();

  // Send data to ThingSpeak
  if (WiFi.status() == WL_CONNECTED)
  {
    WiFiClient client;
    HTTPClient http;
    String httpRequestUrl = String(serverUrl) + "?api_key=" + apiKey + "&field1=" + String(Temperature) + "&field2=" + String(Humidity);

    http.begin(client, httpRequestUrl);
    int httpResponseCode = http.GET();

    if (httpResponseCode > 0)
    {
      Serial.println("HTTP Response code: " + String(httpResponseCode));
      Serial.println(http.getString());
    }
    else
    {
      Serial.println("Error on HTTP GET: " + String(httpResponseCode));
    }
    http.end();
  }

  // Read data from ThingSpeak (optional)
  readThingSpeakFeed();

  delay(30000); // Delay before the next loop
}

void readThingSpeakFeed()
{
  if (WiFi.status() == WL_CONNECTED)
  {
    WiFiClient client;
    HTTPClient http;
    http.begin(client, readUrl);  // Menggunakan HTTPS

    int httpResponseCode = http.GET();
    if (httpResponseCode > 0)
    {
      String response = http.getString();
      Serial.println("Response from ThingSpeak:");
      Serial.println(response);
    }
    else
    {
      Serial.println("Error on HTTP GET: " + String(httpResponseCode));
    }
    http.end();
  }
  else
  {
    Serial.println("WiFi not connected");
  }
}