#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include "HX711.h" // Include the HX711 library


// HX711 circuit wiring
const int dataPin = 26;
const int clockPin = 27;
HX711 scale;
//HX711_ADC LoadCell(26, 27); // dt pin, sck pin
LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display
int ButtonTaree = 25;
int ButtonOneItems = 33;
//int ButtonAllItems = 12;
float gramvalue;

int status = false;
bool eventTrigger = false;

void setup()
{
  Serial.begin(115200);
  scale.begin(dataPin, clockPin);
  
  lcd.init();
    // Print a message to the LCD.
    lcd.backlight();
    lcd.setCursor(2, 0); // set cursor to first row
    lcd.print("SMART SHELF "); // print out to LCD
    lcd.setCursor(0, 1); // set cursor to first row
    lcd.print(" 40KG MAX LOAD "); // print out to LCD
    delay(3000);
    lcd.clear();
    pinMode (ButtonOneItems, INPUT_PULLUP);
    pinMode (ButtonTaree, INPUT_PULLUP);

  //Serial.print("UNITS: ");
  //Serial.println(scale.get_units(10));
  //Serial.println("\nEmpty the scale, press a key to continue");
  //while(!Serial.available());
  //while(Serial.available()) Serial.read();

  //scale.tare();
  //Serial.print("UNITS: ");
  //Serial.println(scale.get_units(10));


  //Serial.println("\nPut 1000 gram in the scale, press a key to continue");
  //while(!Serial.available());
  //while(Serial.available()) Serial.read();

  //scale.calibrate_scale(1000, 5);
  //Serial.print("UNITS: ");
  //Serial.println(scale.get_units(10));

  //Serial.println("\nScale is calibrated, press a key to continue");
  // Serial.println(scale.get_scale());
  // Serial.println(scale.get_offset());
  //while(!Serial.available());
  //while(Serial.available()) Serial.read();
}


void loop()
{
  lcd.setCursor(1, 0); // set cursor to first row
    lcd.print("Insert 1 Item"); // print out to LCD
    //scale.get_offset(); // retrieves data from the load cell
    gramvalue = scale.get_scale(); // get output value
  
    if (gramvalue < 0)
    {
      gramvalue = 0;
    }
    else
    {
      lcd.setCursor(0, 1);
      lcd.print(" ");
      lcd.setCursor(8, 1);
      lcd.print(" ");
    }
  
    lcd.setCursor(5, 1);   // set cursor to second row
    lcd.print(gramvalue, 1);       // print out the retrieved value to the second row
    lcd.print("g ");
   
    if (gramvalue >= 40000)
    {
      gramvalue = 0;
      lcd.setCursor(0, 0); // set cursor to first row
      lcd.print("  Over Loaded   ");
      delay(200);
    }
    if (digitalRead (ButtonTaree) == LOW)
    {
      lcd.setCursor(0, 1); // set cursor to secon row
      lcd.print("   Taring...    ");
      scale.get_offset();
      lcd.setCursor(0, 1);
      lcd.print("                ");
    }
}