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

LiquidCrystal_I2C lcd(0x27,20,4);
HX711 scale;

#define LOADCELL_DOUT_PIN       19
#define LOADCELL_SCK_PIN        18

uint16_t wHeight;
uint32_t ulTimer_hx711;
uint32_t ulTimer_display;
int32_t lRaw_value=0;
float fScale=420.0;
float fWeight=0; 

void setup() {
  
  Serial.begin(115200);
  lcd.init();
  lcd.backlight();
  lcd.clear();

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  ulTimer_hx711 = millis();
  ulTimer_display = millis();
}

void loop() {
  read_hx711();
  display();
 
}

void read_hx711() {
  uint32_t currentMillis = millis();
  if(currentMillis-ulTimer_hx711 >= 1000)
  {
    lRaw_value = scale.read(); 
    lRaw_value = (lRaw_value << 8) / 256;
    fWeight = lRaw_value / fScale;
  }
}

void display() {
  uint32_t currentMillis = millis();
  if(currentMillis-ulTimer_display >= 1000) {
    lcd.setCursor(0, 0);
//             01234567890123456789 
    lcd.print("Read:               ");
    lcd.setCursor(6, 0);
    lcd.print(lRaw_value);
    lcd.setCursor(0, 1);
//             01234567890123456789     
    lcd.print("Scale:              ");
    lcd.setCursor(7, 1);
    lcd.print(fScale);
    lcd.setCursor(0, 2);
//             01234567890123456789    
    lcd.print("Weight:           Kg");
    lcd.setCursor(8, 2);
    lcd.print(fWeight);
  }    
}