#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <HTTPClient.h>
#include <WiFi.h>

// Konfigurasi WiFi
const char* ssid = "Wokwi-GUEST";          // Ganti dengan SSID WiFi Anda
const char* password = "";                 // Ganti dengan Password WiFi Anda

// Konfigurasi ThingSpeak
const char* server = "http://api.thingspeak.com/update";
const char* writeAPIKey = "0744612I6RU5K8YU"; // Write API Key dari ThingSpeak

// Inisialisasi LCD 16x2 (alamat I2C bisa bervariasi)
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Definisi pin LED
const int ledHigh = 26;   // LED Hijau
const int ledMedium = 27; // LED Kuning
const int ledLow = 14;    // LED Merah

// Definisi pin sensor
const int sensorPin = 32; // Pin data soil moisture sensor

void setup() {
  Wire.begin(21, 22);

  // Inisialisasi komunikasi Serial
  Serial.begin(9600);

  // Inisialisasi LCD
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Connecting...");

  // Koneksi ke WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
    lcd.setCursor(0, 1);
    lcd.print(".");
  }
  Serial.println("\nWiFi Connected!");
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("WiFi Connected!");

  pinMode(ledHigh, OUTPUT);
  pinMode(ledMedium, OUTPUT);
  pinMode(ledLow, OUTPUT);

  // Inisialisasi pin sensor sebagai input
  pinMode(sensorPin, INPUT);
}

void loop() {
  // Baca nilai dari sensor kelembaban tanah
  int sensorValue = analogRead(sensorPin);

  // Debug nilai sensor
  Serial.print("Soil Moisture Level: ");
  Serial.println(sensorValue);

  // Tampilkan status kelembaban di LCD dan kontrol LED
  lcd.clear();
  if (sensorValue > 3500) {
    digitalWrite(ledHigh, HIGH);
    digitalWrite(ledMedium, LOW);
    digitalWrite(ledLow, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Status: Basah  ");
  } else if (sensorValue > 1500) {
    digitalWrite(ledHigh, LOW);
    digitalWrite(ledMedium, HIGH);
    digitalWrite(ledLow, LOW);
    lcd.setCursor(0, 1);
    lcd.print("Status: Cukup  ");
  } else {
    digitalWrite(ledHigh, LOW);
    digitalWrite(ledMedium, LOW);
    digitalWrite(ledLow, HIGH);
    lcd.setCursor(0, 1);
    lcd.print("Status: Kering ");
  }

  // Kirim data ke ThingSpeak
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;

    String url = String(server) + "?api_key=" + writeAPIKey + "&field4=" + String(sensorValue);
    http.begin(url);

    int httpResponseCode = http.GET(); // Mengirim data dengan metode GET
    if (httpResponseCode > 0) {
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
    } else {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    }
    http.end();
  } else {
    Serial.println("WiFi Disconnected!");
  }

  // Tunggu 15 detik sebelum mengirim pembaruan lagi (sesuai aturan ThingSpeak)
  delay(1000);
}