uses PlatformIO

1. install Adafruit-SSD1306 platformio lib install 135 which automatically also pulls in the Adafruit-GFX library
2. Edit Adafruit-SSH1306.h uncommenting the line #define SSD1306_128_64

1. Connect the i2c (SDA and SCL) lines as well as GND/VCC to the Monochrome SSD1306 OLED screens.
2. In 'platform.ini' file, setup board details. [board setup details can be found at PlatformIO boards page]
3. upload to board: cmd + shift + u