/**
 * Complete project details at https://RandomNerdTutorials.com/arduino-load-cell-hx711/
 *
 * HX711 library for Arduino - example file
 * https://github.com/bogde/HX711
 *
 * MIT License
 * (c) 2018 Bogdan Necula
 *
**/

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

// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 4;
const int LOADCELL_SCK_PIN = 5;

const int pin2 = 2;
const int pin3 = 3;

const int pin6 = 6;
const int pin7 = 7;

const int pin8 = 8;
const int pin9 = 9;

HX711 scale;
HX711 scale2;
HX711 scale3;
HX711 scale4;







void setup() {
  Serial.begin(57600);


  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale2.begin(pin2, pin3) ;
  scale3.begin(pin6, pin7) ;
  scale4.begin(pin8, pin9) ;


  scale.set_scale(18.86);
  scale2.set_scale(18.86);
  scale3.set_scale(18.86);
  scale4.set_scale(18.86);

  scale.tare();
  scale2.tare();
  scale3.tare();
  scale4.tare();


//vitale
pinMode (12, INPUT); //triggerpin
pinMode (13, OUTPUT); //echopin




}

void loop() {


  digitalWrite (13, LOW);
  digitalWrite (13, HIGH);
  delay (10);
  digitalWrite (13, LOW);
  long durata = pulseIn(12, HIGH);
  long distanza = 0.034 * durata / 2;
  int altezza = 200 - distanza;
  Serial.print("altezza:");
  Serial.println(altezza);



  //Serial.println(scale2.get_units(10), 5);

  long lettura = ((scale.get_units(5) + scale2.get_units(5) + scale3.get_units(5) + scale4.get_units(5))/4) ;
 /// Serial.println(lettura);
  String stringOne = String(lettura) ;
  stringOne = stringOne + "g" ;
  Serial.println(stringOne);












}