#include "HX711.h"
#define DOUT  3
#define CLK   2
#include <LiquidCrystal_I2C.h> 

HX711 scale;
float calibration_factor = -4000;  
float knownZero = 0.0;

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#define trigPin 12
#define echoPin 11

void setup() {
  Serial.begin(9600);
  scale.begin(DOUT, CLK);
  scale.set_scale(calibration_factor);
  knownZero = scale.get_units();

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  
}

void loop() {
 
  float weight = scale.get_units();
  float beban;
  weight -= knownZero;
  beban = weight * -9.54;
  
  long duration, distance,sum;

  lcd.init();
  lcd.backlight();

  // Print something
  lcd.setCursor(2, 0);
  lcd.print("Weight :");
  lcd.print(beban);
  lcd.print("\nKg");

  digitalWrite(trigPin, LOW); 
  delayMicroseconds(2); 
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(2); 
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration/2) / 29.1;
  Serial.print(distance);

  sum = (200 - distance);
  Serial.println(" cm");
  lcd.backlight (   );
  lcd.setCursor(4,1);
  lcd.print("High ");
  lcd.print(sum);
  lcd.print(" cm");
  
  delay(500); 
}