QR Code OLED

https://techtutorialsx.com/2017/12/16/esp32-arduino-ssd1306-oled-drawing-a-qr-code/

#include <Wire.h>

#include "SSD1306.h"

#include <qrcode.h>

 

SSD1306 display(0x3c, 5, 4);

QRcode qrcode (&display);

 

void setup() {

 

  display.init();

  display.display();

 

  qrcode.init();

  qrcode.create("Hello from esp32");

}

 

void loop() {}

ESP32 Built-in OLED Board (Wemos Lolin32): Pinout, Libraries and OLED Control

https://randomnerdtutorials.com/esp32-built-in-oled-ssd1306/
SSD1306Wire  display(0x3c, 5, 4);
https://www.youtube.com/watch?v=wRW32gTLsKE
https://techtutorialsx.com/2017/12/02/esp32-arduino-interacting-with-a-ssd1306-oled-display/