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

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
HX711_ADC LoadCell(3, 2);
const int pir = 4;
const int piezo = 6;
const int nyala = 5;
const int mati = 0;
const int taree = 1;

int in = 0;
bool deviceOn = false;
bool pirState = false;
bool lastPirState = false;

void setup() {
  pinMode(pir, INPUT);
  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(pir,LOW);
  digitalWrite(piezo,LOW);
}

void loop() {
  if (digitalRead(taree) == LOW) {
    lcd.clear();
    lcd.setCursor(2, 0);
    lcd.print("Kalibrasi...");
    delay(1000);
    LoadCell.start(1000);
    lcd.clear();
  } else {
    pirState = digitalRead(pir)== HIGH;
    if (pirState && !lastPirState) {
      digitalWrite(piezo, HIGH);
      in++;
      delay(100);
    } else {
      digitalWrite(piezo, LOW);
    }
    lastPirState = pirState;
  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(pir,LOW);
    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 ");
  }
}