#include <LiquidCrystal.h>
#include <Servo.h>
#include "HX711.h" // Include the HX711 library

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // Initialize the LCD with the pins connected to it
Servo servoMotor;
int pirPin = 7; // PIR motion sensor pin
int ledPin = 8; // Indicator LED pin
const int loadCellDoutPin = 9;
const int loadCellSckPin = 10;

float calibration_factor = 100.0; // Adjust this value based on your load cell's calibration

HX711 scale; // Declare the HX711 object

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);
  
  lcd.begin(20, 4); // Initialize the LCD
  lcd.setCursor(0, 0);
  lcd.print("WEIGHT: ");
  
  servoMotor.attach(6); // Attach servo to pin 6
  servoMotor.write(0); // Initialize servo at 0 degrees

  // Initialize the HX711 library and set the calibration factor
  scale.begin(loadCellDoutPin, loadCellSckPin);
  scale.set_scale(calibration_factor);
}

void loop() {
  if (digitalRead(pirPin) == HIGH) {
    // PIR sensor detected motion, close servo motor
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("WEIGHT: ");
    lcd.setCursor(0, 1);
    lcd.print("");
    lcd.setCursor(0, 2);
    lcd.print("");
    lcd.setCursor(0, 2);
    lcd.print("Motion detected");
    servoMotor.write(0); // Close the servo
    delay(500);
  } else {
    // Read the weight from the load cell
    float weight = scale.get_units();
    lcd.setCursor(8, 0);
    lcd.print(weight, 2);
    lcd.print(" kg     ");
    
    // Check weight conditions and control the servo and LED
    if (weight >= 2 && weight <= 3) {
      servoMotor.write(180); // Open the servo
      digitalWrite(ledPin, HIGH); // Turn on indicator LED
    } else if (weight > 4) {
      servoMotor.write(0); // Close the servo
      lcd.setCursor(0, 2);
      lcd.print("berat lebih or");
      lcd.setCursor(0, 3);
      lcd.print("ganti pcs");
      
    }
  }
}