const Oled = require('oled-disp');
const oled = new Oled({ width: 128, height: 64, dcPin: 23, rstPin : 24}); // 7pin spi, rasp

oled.begin(function(){
  oled.clearDisplay();
});

// Text example (kor and eng)
oled.setCursor(1, 1);
oled.writeString(2, "안녕 Hi", 2, true);

// PNG example (128x64 png only)
pngtolcd("a.png", false, function(err, bitmap) {
  oled.buffer = bitmap;
  oled.update();
}