This is a 2.42 inch OLED display module of 128x64 resolution in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current.

Working without backlight, the OLED display module could give out light by itself.

In low ambient light conditions such as a dark room, an OLED screen can achieve a higher contrast ratio than an LCD.

OLED display module also has a much faster response time than an LCD.
The display with small dimension is suitable for MP3, function cellphone, smart health device, etc.

The seventh pin CS signal is leaded by default; If you do not need it, you can solder R18, then CS signal is directly grounded.

SPI communication or I2C communication can be switched by configuring three resistors R3 R4 R5.

As for IIC communication, it is necessary to move the resistor on R4 to R3, and R5 is soldered with 0 ohm resistor.

Product Introduction:
Size:2.42 inches
Resolution:128*64
Power supply voltage: 3.3V
Color: Green/White/Blue/Yellow

SPI Interface Definition:
GND:power ground
VCC:power positive
SCL:clock wire
SDA:data wire
RES:reset wire
DC:data/command
CS:chip selection