HX711 - factor

//But me coffee: https://paypal.me/chlebovec

#include "HX711.h"

#define DOUT  3
#define CLK  2
HX711 scale;

float calibration_factor = -50.10; //KALIBRAČNÝ FAKTOR
void setup() {
  scale.begin(DOUT, CLK);
  Serial.begin(115200);
  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: ");
  Serial.print(scale.get_units(10), 2);
  Serial.print(" g"); //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person
  Serial.print(" calibration_factor: ");
  Serial.print(calibration_factor);
  Serial.println();

  if (Serial.available())
  {
  //LADENIE
    char temp = Serial.read();
    if (temp == '+' || temp == 'a')
      calibration_factor += 0.1;
    else if (temp == '-' || temp == 'z')
      calibration_factor -= 0.1;
  }
}