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

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
#define BUTTON_PIN 2
#define DOUT  4
#define CLK  5

HX711 scale;
int buttonState = 0;
int lastButtonState = 0;
float calibration_factor = 420; // Adjust according to your load cell
float tareValue = 0; // Variable to store the tare value
float density = 1.0; // Density of water in g/ml
float containerVolume = 1000; // Volume of the container in ml

void setup() {
  scale.begin(DOUT, CLK);
  lcd.begin(16, 2);
  pinMode(BUTTON_PIN, INPUT);

  delay(2000);

  lcd.clear();
  lcd.print("Volume: ");

  scale.set_scale(calibration_factor);
  scale.tare();
  tareValue = scale.get_units();
}

void loop() {
  buttonState = digitalRead(BUTTON_PIN);

 if (buttonState != lastButtonState) {
    if (buttonState == LOW) {
      scale.tare();
      tareValue = scale.get_units();
    }
    delay(50 ); // Debounce delay
  }
  lastButtonState = buttonState;

  float weight = scale.get_units() - tareValue;
  float volume = (weight / density) * containerVolume; // Convert weight to volume

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Water Dispenser");
  lcd.setCursor(0, 1);
  lcd.print("Volume: ");
  lcd.print(volume, 2);
  lcd.print(" ml");

  delay(1000);
}