//#include <Wire.h>
//#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

void setup() {
  Serial.begin(115200);

  if(!display.begin(SSD1306_BLACK, 0x3C)) {        //Modificacion de SSD1306_I2C con SSD1306_BLACK
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  delay(2000);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print(F("Hello, ESP32 with I2C!"));

  //******************************
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);
  display.print(F("Figuras Geometricas"));

  // Dibuja figuras geométricas
  drawCircle();
  drawRectangle();
  drawTriangle();
  //********************************
  display.display();
}

void loop() {
  // No hay nada especial para hacer en el bucle de ejemplo
}

//FUNCIONES
void drawCircle() {
  display.drawCircle(30, 30, 10, SSD1306_WHITE);
}

void drawRectangle() {
  display.drawRect(50, 10, 20, 30, SSD1306_WHITE);
}

void drawTriangle() {
  display.drawTriangle(90, 10, 80, 40, 100, 40, SSD1306_WHITE);
}