//Anastasia Tiara Andini Yuanita
//16032110005
//TNU29

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <ThingSpeak.h>
#include <DHTesp.h>

#define DHTPIN 15
#define DHTTYPE DHTesp::DHT22

#define WIFI_SSID "Wokwi-GUEST"
#define WIFI_PASSWORD ""

#define THINGSPEAK_CHANNEL_ID 2
#define THINGSPEAK_API_KEY "J9XOJN93OT18CR1L"

DHTesp dht;
WiFiClient client;

LiquidCrystal_I2C lcd(0x27, 16, 2);
unsigned long previousMillis = 0;

void setup() {
  lcd.init();                      // Inisialisasi LCD 16x2 I2C
  lcd.backlight();
  dht.setup(DHTPIN, DHTTYPE);
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  ThingSpeak.begin(client);
}

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= 1000) {
    previousMillis = currentMillis;

    int seconds = (currentMillis / 1000) % 60;
    int minutes = (currentMillis / (1000 * 60)) % 60;
    int hours = (currentMillis / (1000 * 60 * 60)) % 24;

    String time = String(hours) + ":" + (minutes < 10 ? "0" : "") + String(minutes) + ":" + (seconds < 10 ? "0" : "") + String(seconds);

    lcd.setCursor(0, 0);
    lcd.print("Waktu: ");
    lcd.print(time);

    float temperature = dht.getTemperature();
    if (isnan(temperature)) {
      lcd.setCursor(0, 1);
      lcd.print("Failed to read");
      lcd.setCursor(0, 2);
      lcd.print("temperature!");
      delay(2000);
      return;
    }
    float humidity = dht.getHumidity();
    if (isnan(humidity)) {
      lcd.setCursor(0, 1);
      lcd.print("Failed to read");
      lcd.setCursor(0, 2);
      lcd.print("humidity!");
      delay(2000);
      return;
    }

    lcd.setCursor(0, 1);
    lcd.print("Suhu: ");
    lcd.print(temperature);
    lcd.print(" C");

    lcd.setCursor(0, 2);
    lcd.print("Kelembapan: ");
    lcd.print(humidity);
    lcd.print(" %");

    ThingSpeak.setField(1, temperature);
    ThingSpeak.setField(2, humidity);
    ThingSpeak.writeFields(THINGSPEAK_CHANNEL_ID, THINGSPEAK_API_KEY);
  }

  delay(100);
}