Driver for the small black-white OLED display.
Driver for the SSD1306 OLED display. This is a 128x64 monochrome display.
On the Wemos Lolin board the I2C bus is connected to pin5 (SDA) and pin4 (SCL), and the SSD1306 display is device 0x3c. See https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf for programming info.
This package also contains an experimental driver for the SSD1306 in SPI mode.