#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

// Inisialisasi keypad
const byte ROWS = 4; //jumlah baris pada keypad
const byte COLS = 4; //jumlah kolom pada keypad
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {13, 12, 14, 27}; //sesuaikan pinnya sesuai dengan koneksi Anda
byte colPins[COLS] = {26, 25, 33, 32}; //sesuaikan pinnya sesuai dengan koneksi Anda
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

// Inisialisasi LCD
LiquidCrystal_I2C lcd(0x27, 16, 2); // Alamat I2C default untuk LCD 16x2 adalah 0x27
 
int sensorInterrupt = 0;
int sensorPin = 2;
int solenoidValve = 5;
unsigned int SetPoint = 400;
String code = "";
 
float calibrationFactor = 90;
 
volatile byte pulseCount = 0;
 
float flowRate = 0.0;
unsigned int flowMilliLitres = 0;
unsigned long totalMilliLitres = 0, volume = 0;
 
unsigned long oldTime;
const int relay_moteur = 35;
 
void setup() {
  totalMilliLitres = 0;
  pinMode(relay_moteur, OUTPUT);
  lcd.init();
  lcd.backlight(); 
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Set Volume:");
  Serial.begin(9600);
  pinMode(solenoidValve, OUTPUT);
  digitalWrite(solenoidValve, HIGH);
  pinMode(sensorPin, INPUT);
  digitalWrite(sensorPin, HIGH);
  
}
 
void loop() {
  char key = keypad.getKey();
 
  if (key) {
    code += key;
    lcd.setCursor(0, 1);
    lcd.print(code);
    delay(100);
  }
 
  if (key == 'D') {
    if (code.toInt() <= 1500) {
      volume = code.toInt();
    } else {
      lcd.clear();
 
      lcd.setCursor(0, 0);
      lcd.print("Set Volume:");
    }
    code = "";
  }
 
  if (totalMilliLitres < volume) {
    digitalWrite(relay_moteur, HIGH);
 
    if ((millis() - oldTime) > 1000) {
      detachInterrupt(sensorInterrupt);
 
      flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
      oldTime = millis();
      flowMilliLitres = (flowRate / 60) * 1000;
      totalMilliLitres += flowMilliLitres;
 
      unsigned int frac;
      Serial.print("Flow rate :-");
      Serial.print(flowMilliLitres, DEC);
      Serial.print("mL/Second");
      Serial.print("\t");
      lcd.clear();
 
      lcd.setCursor(0, 0);
      lcd.print("Speed :");
      lcd.print(flowMilliLitres);
      lcd.print(" ml/s");
      Serial.print("Output Liquid Quantity: ");
      Serial.print(totalMilliLitres, DEC);
 
      Serial.println("mL");
      Serial.print("\t");
      lcd.setCursor(0, 1);
      lcd.print("Filled:");
      lcd.print(totalMilliLitres);
      lcd.print(" ml");
      if (totalMilliLitres > 40) {
        SetSolinoidValve();
      }
      pulseCount = 0;
     
    }
  } else {
    digitalWrite(relay_moteur, LOW);
    volume = 0;
  }
}
 
void pulseCounter() {
 
  pulseCount++;
}
 
void SetSolinoidValve() {
  digitalWrite(solenoidValve, LOW);
}