/**
 *
 * HX711 library for Arduino - example file
 * https://github.com/bogde/HX711
 *
 * MIT License
 * (c) 2018 Bogdan Necula
 *
**/
#include "HX711.h"
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>  //https://github.com/adafruit/Adafruit-GFX-Library

// HX711 circuit wiring
const int LOADCELL_DOUT_PIN = 2;
const int LOADCELL_SCK_PIN = 3;

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define UI_BMPWIDTH  128

String tempString;

HX711 scale;

void setup() {

//++++++++ visualizacion
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

  delay(2000);         // wait for initializing
  oled.clearDisplay(); // clear display

  oled.setTextSize(2);      // text size
  oled.setTextColor(WHITE); // text color
  oled.setCursor(0, 10);    // position to display

  tempString.reserve(10);   // to avoid fragmenting memory when using String

//++++++++++++++++

  Serial.begin(115200);
  Serial.println("HX711 Demo");

  Serial.println("Initializing the scale");

  // Initialize library with data output pin, clock input pin and gain factor.
  // Channel selection is made by passing the appropriate gain:
  // - With a gain factor of 64 or 128, channel A is selected
  // - With a gain factor of 32, channel B is selected
  // By omitting the gain factor parameter, the library
  // default "128" (Channel A) is used here.
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);

  Serial.println("Before setting up the scale:");
  Serial.print("read: \t\t");
  Serial.println(scale.read());			// print a raw reading from the ADC

  Serial.print("read average: \t\t");
  Serial.println(scale.read_average(5));  	// print the average of 5 readings from the ADC

  Serial.print("get value: \t\t");
  Serial.println(scale.get_value(5));		// print the average of 5 readings from the ADC minus the tare weight (not set yet)

  Serial.print("get units: \t\t");
  Serial.println(scale.get_units(5), 1);	// print the average of 5 readings from the ADC minus tare weight (not set) divided
						// by the SCALE parameter (not set yet)

  //scale.set_scale(2280.f);                      // this value is obtained by calibrating the scale with known weights; see the README for details
  //scale.set_scale(1000.f); //Sin escala en valor digital, aunque de acuerdo con el datasheet y la ganancia, ahora esta en +-20mV a escala completa.
  scale.set_scale(1); //Sin escala, lectura digital completa.

  scale.tare();				        // reset the scale to 0

  Serial.println("After setting up the scale:");

  Serial.print("read: \t\t");
  Serial.println(scale.read());                 // print a raw reading from the ADC

  Serial.print("read average: \t\t");
  Serial.println(scale.read_average(5));       // print the average of 20 readings from the ADC

  Serial.print("get value: \t\t");
  Serial.println(scale.get_value(5));		        // print the average of 5 readings from the ADC minus the tare weight, set with tare()

  Serial.print("get units: \t\t");
  Serial.println(scale.get_units(5), 1);        // print the average of 5 readings from the ADC minus tare weight, divided
						// by the SCALE parameter set with set_scale

  Serial.println("Readings:");

  Serial.println("one reading: \t | average: ");

}



void loop() {

  /*
  Serial.print("one reading:\t");
  Serial.print(scale.get_units(), 1);
  Serial.print("\t| average:\t");
  Serial.println(scale.get_units(5), 1);
*/

  
  Serial.print(scale.get_units(), 1);
  Serial.print(",");
  Serial.println(scale.get_units(5), 1);

//  tempString  = String(scale.get_units(5), 2); // two decimal places
//  tempString += " ue";
//  oledDisplayCenter(tempString); // display temperature on OLED
  
  // display on horizontal and vertical center
  oled.clearDisplay(); // clear display
  oled.setCursor(0, 10);
  oled.println(scale.get_units(5)); // text to display
  oled.display();

  delay(500);


}