#include <SPI.h>
#include <Wire.h>                        // Include Wire library (required for I2C devices)
#include <Adafruit_GFX.h>                // Include Adafruit graphics library
#include <Adafruit_SSD1306.h>            // Include Adafruit SSD1306 OLED driver
#include <EEPROM.h>                      // Include EEPROM 

#define PWM 14


#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels


//#define OLED_RESET 5
//Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define OLED_RESET     -1 // Reset pin # (or -1 if sharing Arduino reset pin)
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


#define button2    6                      // Button B2 is connected to Arduino pin 8

#define button4   7                      // Button B4 is connected to Arduino pin 7

int valorPWM;

void setup()
{
  Serial.begin(9600);

  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr

  // Clear the display buffer.
  display.clearDisplay();
  //display.display();
  display.setTextColor(WHITE, BLACK);

  pinMode(button2, INPUT);
  pinMode(button4, INPUT);

   //display.clearDisplay();

  display.setCursor(0, 0);
  display.setTextSize(1);
  display.print("HOLA");
  display.display();

}

void loop()
{

 
   

  int lectura_boton2 = digitalRead(button2);

  if (lectura_boton2 == 0)
  {

    valorPWM++;

    analogWrite(PWM, valorPWM);
    Serial.println(valorPWM);

    display.setCursor(0, 0);
    display.setTextSize(1);
    display.print("Valor PWM:");

    display.setCursor(60, 0);
    display.setTextSize(1);
    display.print(valorPWM);

    display.display();

    delay(300);
  }

    int lectura_boton4 = digitalRead(button4);

  if (lectura_boton4 == 0)
  {
      display.clearDisplay();
    
    valorPWM--;
    
    analogWrite(PWM, valorPWM);
    Serial.println(valorPWM);

    display.setCursor(0, 0);
    display.setTextSize(1);
    display.print("Valor PWM:");

    display.setCursor(60, 0);
    display.setTextSize(1);
    display.print(valorPWM);

    display.display();

    delay(300);
  }
  
}