#include <HX711.h>

#define calibration_factor .420 // needs to be changed based on units

#define LOADCELL_DOUT_PIN 3
#define LOADCELL_SCK_PIN 2

int initialVolume = 0;

int waterConsumed = 0;
HX711 scale;

int currentWater;
int lastVal = 0;
int prevWaterConsumed = 0;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Serial.println("HX711 scale demo");

  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(calibration_factor);
  pinMode (13, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  currentWater = scale.get_units();

  if (currentWater < lastVal) {
    waterConsumed = initialVolume - currentWater + prevWaterConsumed;
    Serial.print("Water Consumed: ");
    Serial.println(waterConsumed);
    lastVal = currentWater;
    delay(25);
  }
  else if (currentWater > lastVal) {
    prevWaterConsumed = waterConsumed;
    Serial.println ("Water Rising");
    initialVolume = currentWater;
    lastVal = currentWater;
    delay(25);
  }
}