Tynmoel 3pcs 2.42 Inch 12864 128X64 OLED Display Module IIC I2C SPI Serial LCD Screen for C51 STM32 SSD1309 (White Font)

Convenience.
SPI communication or I2C communication can be switched by configuring three resistors R3 R4 R5
Interface Selection: to choose SPI or IIC interface through R3, R4, R5
For IIC communication, it is necessary to move the resistor on R4 to R3, and R5 is soldered with 0 ohm resistor.
Driver IC: SSD1309