#include <LiquidCrystal.h>
#include "HX711_ADC.h"

// Pin assignments
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
const int piezo = 6;
const int nyala = 10;
const int mati = 9;
const int taree = 8;
const int hx711_dout = A1;
const int hx711_sck = A2;
const int trig=13;
const int echo=7;
int maksjarak=200;

int in = 0;
bool deviceOn = false;
bool deteksiitem= false;

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

HX711_ADC LoadCell(hx711_dout, hx711_sck);

NewPing sonar(trig, echo, maksjarak);

void setup() {
  pinMode(piezo, OUTPUT);
  pinMode(nyala, INPUT_PULLUP);
  pinMode(mati, INPUT_PULLUP);
  pinMode(taree, INPUT_PULLUP);

  lcd.begin(16, 2);

  LoadCell.begin(); 
  LoadCell.start(1000);
  LoadCell.setCalFactor(0.42);
  digitalWrite(piezo,LOW);
}

void loop() {
  unsigned int jarak = sonar.ping_cm();
  if (digitalRead(taree) == LOW) {
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Kalibrasi...");
    delay(1000);
    LoadCell.start(1000);
    lcd.clear();
  } else {
      if (jarak > 0 && jarak  < 20 && !deteksiitem) {
        deteksiitem = true;
        in++;
        tone(piezo, 1000, 200);
      }
  }
  // Jika jarak lebih besar dari threshold dan item sudah terdeteksi sebelumnya
      if (jarak  >= 10 && deteksiitem) {
        deteksiitem = false;
      }
      delay(100);
  if (digitalRead(nyala) == LOW) {
    deviceOn = true;
    lcd.clear();
    lcd.setCursor(3, 0);
    lcd.print("Mesin Nyala");
    delay(2000);
    lcd.clear();
    lcd.setCursor(4, 0);
    lcd.print("Kelompok");
    lcd.setCursor(7, 1);
    lcd.print("C3");
    delay(2000);
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Hitung Jumlah");
    lcd.setCursor(0, 1);
    lcd.print("dan berat Baglog");
    delay(2000);
    lcd.clear();
    in = 0;
  }

  if (digitalRead(mati) == LOW) {
    deviceOn = false;
    lcd.clear();
    lcd.setCursor(3, 0);
    lcd.print("Mesin Mati");
    delay(1000);
    lcd.clear();
    digitalWrite(piezo,LOW);
    in = 0; 
    return;
  }

  if (!deviceOn) {
    return;
  }

  if (in >= 3) {
    deviceOn = false;
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Maks 3 Unit");
    lcd.setCursor(3, 1);
    lcd.print("Mesin Mati");
    delay(2000);
    lcd.clear();
    in = 0; 
    return;
  }

  LoadCell.update();
  float i = LoadCell.getData();
    lcd.setCursor(1, 0);
    lcd.print("Jumlah: ");
    lcd.setCursor(9, 0);
    lcd.print(in);
    lcd.print(" Unit  ");
    lcd.setCursor(1, 1);
    lcd.print("Berat : ");
    lcd.setCursor(9, 1);
    lcd.print(i, 0);
    lcd.print(" Gram ");
  }