//===============================================================================================
//AGROWIRA SmartDrip Irrigation Control System
//MODEL: MINI Garden REV 3
//SPEC : 2 Soil Moisture Sensor, 4 Input Button ++/--/<</>>, 1 LCD I2C, 1 Output Pin Relay Pompa
//Coding By: Wira Nugraha
//Last Review: 14 Oct 2023
//===============================================================================================

#include <LiquidCrystal_I2C.h>

//initialize LCD Pin
LiquidCrystal_I2C lcd(0x27,20,4);

//initialize Pin Output
const int LED_RED=10; //LED Hijau Pin 10
const int LED_GREEN=11; //LED Merah Pin 11
const int RELAY=12; //Relay Pompa Fertigasi Pin 12

//initialize pin tombol
const int up_key=2; //tombol ++ di pin 2
const int down_key=3; //tombol -- di pin 3
const int left_key=4; //tombol << / Y di pin 4
const int right_key=5; //tombol >> / T di pin 5

//initialize pin soil moisture sensor
const int sensor1=A0; //Soil Moisture 1
const int sensor2=A1; //Soil Moisture 2

//initialize Setpoint Button
int Button=A2; //Setpoint Parameter Button

//initialize variabel setpoint
int Basah=30; //setpoint kelembaban tanah basah (Pompa OFF)
int Kering=18; //setpoint kelembaban tanah kering (Pompa ON)

//setup pin mode
void setup() {
  pinMode (LED_RED,OUTPUT); //LED Indikator Merah
  pinMode (LED_GREEN,OUTPUT); //LED Indikator Hijau
  pinMode (RELAY,OUTPUT); //Output Relay Pompa
  pinMode (up_key,INPUT); //Tombol ++
  pinMode (down_key,INPUT); //Tombol --
  pinMode (left_key,INPUT); //Tombol Panah Kiri <<--
  pinMode (right_key,INPUT); //Tombol Panah Kanan -->>
  pinMode (Button,INPUT); //Tombol Setting Parameter

  //Pull Up Button
  digitalWrite(up_key,HIGH);
  digitalWrite(down_key,HIGH);
  digitalWrite(left_key,HIGH);
  digitalWrite(right_key,HIGH);
  digitalWrite(Button,HIGH);

  lcd.init(); //hapus layar LCD
  lcd.backlight(); //set backlight LCD
  lcd.setCursor(1, 0); //posisikan cursor di line 1 karakter 0
  lcd.print("    AGROWIRA    ");
  lcd.setCursor(0,1); //posisikan cursor ke line 2 karakter 0
  lcd.print(" SmartDrip Mini ");
  delay(1000);
  lcd.init();
  setpoint(); //jalankan fungsi setpoint() untuk input nilai %Basah & %Kering


}

//Fungsi input setting point %Kering
void inputkering(){
if(digitalRead(down_key)==LOW)
   {
    if(Kering>0) //Setpoin %Kering kurang dari nol
    {
      Kering--;
    }
   }
   if(digitalRead(up_key)==LOW)
   {
    if(Kering<99) //Setpoin %Kering lebih dari 100%
    {
      Kering++;
    }
   }
   
}

//Fungsi Input Setpoint %Basah
void inputbasah(){
  if(digitalRead(down_key)==LOW)
   {
    if(Basah>0) //Setpoin %Basah kurang dari nol
    {
      Basah--;
    }
   }
   if(digitalRead(up_key)==LOW)
   {
    if(Basah<99) //Setpoin %Basah lebih dari 100%
    {
      Basah++;
    }
   }
}


void setpoint() {
  lcd.init();
  lcd.setCursor(1,0);
  lcd.print("Ubah Setpoint?");
  lcd.setCursor(0,1);
  lcd.print("      Y / T     ");
  delay(3000);
  if(digitalRead(left_key)==LOW) //Tekan tombol Y (<<)
  {
   lcd.init();
   lcd.print("Ubah Setpoint...");
   delay(500);
   lcd.init();
   
   input_kering:  //label
   lcd.init();
   inputkering(); //memanggil fungsi input setting %Kering
   lcd.setCursor(1,0);
   lcd.print("%Kering: ");
   lcd.print(Kering);
   lcd.print(" %");
   lcd.setCursor(0,1);
   lcd.print("Simpan? Y/T");
   if(digitalRead(left_key)==LOW)
   {
    lcd.init();
    lcd.print("Menyimpan...");
    delay(1000);
    goto input_basah; //lompat ke label input_basah (line 92)
   }
   else goto input_kering; //lompat ke label input_kering (line 75)
   
   input_basah:
   lcd.init();
   inputbasah(); //memanggil fungsi input setting %Basah
   lcd.setCursor(1,0);
   lcd.print("%Basah: ");
   lcd.print(Basah);
   lcd.print(" %");
   lcd.setCursor(0,1);
   lcd.print("Simpan? Y/T");
   if(digitalRead(left_key)==LOW)
   {
    goto lanjut; //lompat ke label lanjut (line 146)
   }
   else goto input_basah; //lompat ke label input_basah (line 131)
    lanjut:
    lcd.init();
    lcd.print("Menyimpan.......");
    delay(2000);

  }
  else {
    lcd.init();
    lcd.setCursor(1,0);
    lcd.print(" Nilai Setpoint ");
    lcd.setCursor(0,1);
    lcd.print("  Tidak Diubah! ");
    Basah=30; //Berikan nilai factory setting %Basah= 30%
    Kering=18; //Berikan nilai factory setting %Kering= 18%
    delay(2000);
  }

}

//Fungsi Berulang
void loop() {
  double WaterLevel1 = ((100.0/1024.0) * analogRead(sensor1)); //Membaca %Soil Moisture dari Sensor 1
  double WaterLevel2 = ((100.0/1024.0) * analogRead(sensor2)); //Membaca %Soil Moisture dari Sensor 2
  double AVGWaterLevel = (WaterLevel1 + WaterLevel2)/2; //Membuat rata-rata pembacaan %Soil Moisture Kebun

  lcd.init();
  lcd.setCursor(0,0);
  lcd.print("Moisture: ");
  lcd.print(AVGWaterLevel);
  lcd.print("%");

  if(AVGWaterLevel > Kering && AVGWaterLevel < Basah)
  {
    digitalWrite(RELAY,HIGH); //Nyalakan Pompa
    digitalWrite(LED_RED,HIGH);
    digitalWrite(LED_GREEN,LOW); //Nyalakan LED Hijau 
    lcd.setCursor(0,1);
    lcd.print("    POMPA ON    ");
  }
  else if(AVGWaterLevel < Kering)
  {
    digitalWrite(RELAY,HIGH); //Nyalakan Pompa
    digitalWrite(LED_RED,HIGH);
    digitalWrite(LED_GREEN,LOW); //Nyalakan LED Hijau 
    lcd.setCursor(0,1);
    lcd.print("    POMPA ON    ");
  }
  else if(AVGWaterLevel > Basah)
  {
    digitalWrite(RELAY,LOW); //Matikan Pompa
    digitalWrite(LED_RED,LOW); //Nyalakan LED Merah
    digitalWrite(LED_GREEN,HIGH); 
    lcd.setCursor(0,1);
    lcd.print("    POMPA OFF   ");
  }
  else
  {
    digitalWrite(RELAY,LOW); //Matikan Pompa
    digitalWrite(LED_RED,LOW); //Nyalakan LED Merah
    digitalWrite(LED_GREEN,HIGH); 
    lcd.setCursor(0,1);
    lcd.print("    POMPA OFF   ");
  }
  delay (1000);

  lcd.init();
  lcd.setCursor(0,0);
  lcd.print("kering: ");
  lcd.print(Kering);
  lcd.print("%");
  lcd.setCursor(0,1);
  lcd.print("basah:  ");
  lcd.print(Basah);
  lcd.print("%");
  delay(1000);

  if(digitalRead(Button)==LOW)
  {
    lcd.init();
    setpoint();
  }
}