/*
 Setup your scale and start the sketch WITHOUT a weight on the scale
 Once readings are displayed place the weight on the scale
 Press +/- or a/z to adjust the calibration_factor until the output readings match the known weight
 Arduino pin 6 -> HX711 CLK
 Arduino pin 5 -> HX711 DOUT
 Arduino pin 5V -> HX711 VCC
 Arduino pin GND -> HX711 GND 
*/

#include "HX711.h"

HX711 scale(A1, A0);   // DT, CLK

float calibration_factor = -3.7; // this calibration factor is adjusted according to my load cell
float units;
float ounces;

void setup() {
  Serial.begin(9600);
  Serial.println("HX711 calibration sketch");
  Serial.println("Remove all weight from scale");
  Serial.println("After readings begin, place known weight on scale");
  Serial.println("Press + or a to increase calibration factor");
  Serial.println("Press - or z to decrease calibration factor");

  scale.set_scale();
  scale.tare();  //Reset the scale to 0

  long zero_factor = scale.read_average(); //Get a baseline reading
  Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects.
  Serial.println(zero_factor);
}

void loop() {

  scale.set_scale(calibration_factor); //Adjust to this calibration factor

  Serial.print("Reading: ");
  units = scale.get_units(), 10;
  if (units < 0)
  {
    units = 0.00;
  }
  ounces = units * 0.035274;
  Serial.print(ounces);
  Serial.print(" grams"); 
  Serial.print(" calibration_factor: ");
  Serial.print(calibration_factor);
  Serial.println();

  if(Serial.available())
  {
    char temp = Serial.read();
    if(temp == '+' || temp == 'a')
      calibration_factor += 1;
    else if(temp == '-' || temp == 'z')
      calibration_factor -= 1;
  }
}

  
#include "HX711.h"

HX711 scale(A1, A0);                          

float calibration_factor = -3.7;          // калибровка!
float units;
float ounces;

void setup() {
  Serial.begin(9600); 
  scale.set_scale();
  scale.tare();                              //Сбрасываем на 0
  scale.set_scale(calibration_factor);       //Применяем калибровку
}

void loop() { 

  Serial.print("Reading: ");
  
  for(int i = 0;i < 10; i ++) units =+ scale.get_units(), 10;   // усредняем показания считав 10 раз 
  units / 10;                                                   // делим на 10
   
  ounces = units * 0.035274;                                    // переводим унции в граммы              
  Serial.print(ounces);                                          // отправляем в монитор порта
  Serial.print(" grams");  
  Serial.println();

 
}