//**********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"

//**********BLYNK, library**************************************
#include <BlynkSimpleEsp32.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP32Servo.h>

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

// Deklarasi PIN yang akan digunakan
#define SDA_PIN 18
#define SCL_PIN 19
#define SOIL_SENSOR_PIN 34
#define LED_RED_PIN 2
#define LED_BLUE_PIN 4
#define SERVO_PIN 15
#define SENSOR_POWER_PIN 21

BlynkTimer timer;
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo servo;

void setup() {
  // Kode ini akan dijalankan sekali
  
  // 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() {
  int16_t moisture = analogRead(SOIL_SENSOR_PIN);
  String msg = "";
  
  if(moisture < 2165) {
    msg = "BASAH";
    digitalWrite(LED_RED_PIN, LOW);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(0);
    Blynk.virtualWrite(V2, "Air terlalu banyak, kurangi air");
  } else if( moisture > 3135) {
    msg = "KERING";
    digitalWrite(LED_RED_PIN, HIGH);
    digitalWrite(LED_BLUE_PIN, LOW);
    servo.write(90);
    Blynk.virtualWrite(V2, "Air kering, tambahkan air");
  } else {
    msg = "BAIK";
    digitalWrite(LED_RED_PIN, LOW);
    digitalWrite(LED_BLUE_PIN, HIGH);
    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.print("Soil: ");
    lcd.print(message);
    Blynk.virtualWrite(V1, message);
  } 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(500);
    digitalWrite(LED_RED_PIN, LOW);
  }

  delay(1000); 
}


void loop() {
  //********BLYNK, menjalankan blynk****************************
    Blynk.run();
    timer.run();
    sendSensor();
}