// BLYNK, identitas device
#define BLYNK_TEMPLATE_ID "TMPL69kEQwPBP"
#define BLYNK_TEMPLATE_NAME "Self Watering System ESP32 and Soil Moisture"
#define BLYNK_AUTH_TOKEN "iFBv4P2fzFR5mXdUeb74u-H5Dh9s0jZT"

//library
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>
#include "DHT.h"

// BLYNK, ssid, pass, token
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Deklarasi PIN yang akan digunakan
// Pin lcd i2c  (20x4)
#define SDA_PIN 18 
#define SCL_PIN 19
#define SOIL_SENSOR_PIN 34 // Soil sensor
#define LED_RED_PIN 2 // lcd red
#define LED_BLUE_PIN 4 // lcd blue
#define SERVO_PIN 15 // Servo
#define SENSOR_POWER_PIN 21 // Pin power soil sensor
const int relay1 = 17; // Fan Cooler lcd (Cyan)
const int relay2 = 16; // Heat lamp lcd (Lime)
// DHT22, DHT Type
#define DHTPIN 5  
#define DHTTYPE DHT22 

DHT dht(DHTPIN, DHTTYPE);

int relayOFF = HIGH; // Relay nyala
int relayON = LOW; // Relay mati

// lcd Identification
BlynkTimer timer;
LiquidCrystal_I2C lcd(0x27, 20, 4);
Servo servo;

void setup() {
  // Kode ini akan dijalankan sekali
  
  // Menyalakan DHT22
  Serial.begin(9600); //membaca di serial monitor
  dht.begin(); 
  
  // Setting pin relay menjadi output
  Serial.begin(115200);
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  // Kalibrasi cooler dan heater
  digitalWrite(relay1, relayON);
  digitalWrite(relay2, relayON);

  // Setting pin led menjadi output
  pinMode(LED_RED_PIN, OUTPUT); 
  pinMode(LED_BLUE_PIN, OUTPUT);

  pinMode(SENSOR_POWER_PIN, OUTPUT);
	
	// Inisialisasi untuk memastikan sensor OFF
	digitalWrite(SENSOR_POWER_PIN, LOW);
  
  // Setting pin LCD
  Wire.begin(SDA_PIN, SCL_PIN);
  Serial.begin(115200);
  Serial.println("Hello, start configuration!");

  // Setting servo pin
  servo.attach(SERVO_PIN);
  servo.write(0);

  // Inisialisasi lcd
  lcd.init();
  lcd.backlight();

  //BLYNK, mulai koneksi ke blynk
  Blynk.begin(auth, ssid, pass);

  timer.setInterval(2500L, sendSensor);
}

// BLYNK, syncron data terakhir saat koneksi tersambung
BLYNK_CONNECTED() { 
  Blynk.syncAll();
}

// BLYNK, mendapat input dr blynk lewat datastream V0
BLYNK_WRITE(V0) {
  int saklar=param.asInt();
  digitalWrite(SENSOR_POWER_PIN, saklar);
}

String createMessage() {
  float moisture = analogRead(SOIL_SENSOR_PIN);
  float mois = moisture-1680;
  float soilmois = mois/1940*100;
  String msg = "";
  
  if(soilmois < 60.00) {
    msg = "KERING";
    digitalWrite(LED_RED_PIN, HIGH);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(0);
    Blynk.virtualWrite(V2, "Air terlalu sedikit, tambahkan air");
  } else if( soilmois > 80.00) {
    msg = "BASAH";
    digitalWrite(LED_RED_PIN, HIGH);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(90);
    Blynk.virtualWrite(V2, "Air terlalu banyak, hentikan penyiraman air");
  } else {
    msg = "BAIK";
    digitalWrite(LED_RED_PIN, LOW);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(0);
    Blynk.virtualWrite(V2, "Air dalam kondisi baik");
  }
  return msg;
}

void sendSensor() {
  int activeSensor = digitalRead(SENSOR_POWER_PIN);
  String message = "";
  if(activeSensor == 1) {
    message = createMessage();
    Serial.println("Keadaan: "+message);
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Soil: ");
    lcd.print(message);
    Blynk.virtualWrite(V1, message);
    delay(1000);
  } else {
    message = "Sensor Mati";
    lcd.clear();
    lcd.print(message);
    Blynk.virtualWrite(V1, message);
    Blynk.virtualWrite(V2, message);
    digitalWrite(LED_RED_PIN, HIGH);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(0);
    delay(1000);
    digitalWrite(LED_RED_PIN, LOW);
  }

  delay(1000); 
}

void loop() {
  // BLYNK, menjalankan blynk
  Blynk.run();
  timer.run();
  sendSensor();
  //membaca kelembaban dalam data float, variabel h 
  float h = dht.readHumidity();
  //membaca temperatur dalam data float, variabel t
  float t = dht.readTemperature();
  //membaca temperatur farenheit dengan mengubah temperatur celcius melalui program dibawah 
  float f = dht.readTemperature(true);

  // pengecekan ulang bila suhu yang dibaca salah dan dilakukan pengulangan
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  // Hitung indeks panas dalam Fahrenheit (default)
  float hif = dht.computeHeatIndex(f, h);
  // Hitung indeks panas dalam Celcius (isFahreheit = false)
  float hic = dht.computeHeatIndex(t, h, false);
  delay(100);

  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.print(F("°C "));
  Serial.print(f);
  Serial.print(F("°F  Heat index: "));
  Serial.print(hic);
  Serial.print(F("°C "));
  Serial.print(hif);
  Serial.println(F("°F"));
//tampilan di serial monitor

  if (t > 28.00) {
  // Jika suhu melebihi batas atas, matikan perangkat
  digitalWrite(relay1, relayON);
  digitalWrite(relay2, relayOFF);
  delay(10);
  } else if (t < 24.00) {
  // Jika suhu kurang dari batas bawah, hidupkan perangkat
  digitalWrite(relay1, relayOFF);
  digitalWrite(relay2, relayON);
  delay(10);
  } else {
  digitalWrite(relay1, relayOFF);
  digitalWrite(relay2, relayOFF);
  }
  //tampilan dalam peraga lcd beruapa humidity (h) pada baris 1, trmperatur dalan celcius (t) pada baris 2, heat index hic pada baris 3
  lcd.setCursor(0, 1); //menentukan baris dan kolom
  lcd.print(F("Humidity: "));
  lcd.print(h);
  lcd.print(F("%"));
  lcd.setCursor(0,2);
  lcd.print(F("Temp: "));
  lcd.print(t);
  lcd.print(F(" C "));
  lcd.setCursor(0,3);
  lcd.print(F("HeatIndex: "));
  lcd.print(hic);
  lcd.print(F(" C"));
  delay(2000); // Kecepatan untuk mengulang program dalam ms
}