Arduino_SSD1306(Arduino_DataBus *bus, int8_t rst = GFX_NOT_DEFINED, int16_t w = 128, int16_t h = 64); bool begin(int32_t speed = GFX_NOT_DEFINED) override; void drawBitmap(int16_t x, int16_t y, ...

Compared to the Arduino Uno of old, modern microcontrollers are absolutely tiny — especially for the amount of processing power and I/O you get. But if you need something really small, like ...