Does anybody know where these commands are documented?
QuoteDoes anybody know where these commands are documented?Your Ebay link includes a link to some example Arduino code. The commands are used (but not really documented) within that code.Don
I assume your display has an additional controller which accepts high level commands for drawing text (note: the SSD1306 has I2C ID 0x3c or 0x3d, while the example code uses 0x51)
Indeed there seems to be no information on the high level protocol of the additional controller.
Adafruit code will not work, because adafruit just sells and supports the plain OLED with the SSD1306 controller. Also u8glib only supports OLEDs with plain SSD1306 (but u8glib will probably work on a ATTINY84/85).