#include <HX711.h>
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

#define DATA_PIN  19
#define CLOCK_PIN 18
#define led 5

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
HX711 hx711;

volatile float units;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  hx711.begin(DATA_PIN, CLOCK_PIN);
  lcd.init();
  lcd.backlight();
  pinMode(led, OUTPUT);

  // Efetua a leitura e calcula a escala
  // long average = hx711.read_average(50);
  // float scale = ((average - hx711.get_offset()) / 1.00f);

  // Define com a escala calculada
  hx711.set_scale(420.0983);
  hx711.tare();
}

void loop() {
  units = hx711.get_units();
  Serial.println(units);
  lcd.setCursor(2, 0);
  lcd.print("Berat :");
  lcd.print(units);

  if(units < 4.9){
    digitalWrite(led, HIGH);
  }
  else{
    digitalWrite(led, LOW);
  }
  delay(1000);
}