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Question: Why the resolution appears to be 128×32, not 128×64?
Answer: When you use 128×64 pixel display, you should comment the default display type #define SSD1306_128_32 and uncomment #define SSD1306_128_64 at line 73 and 74 of the driver header file Adafruit_SSD1306.h. Then the 128×64 pixel can be displayed normally.
OLED is self-luminous, no backlight! It will not have any reaction if you only connect it with power supply. You must program it and operate correctly, then it will display normally.
Super High Brightness
Super High Contrast (Adjustable)
Interface Type: IIC / I2C-4PIN
0.96 inch OLED display chip: SSD1306
High resolution: 128 * 64 Pixel
Voltage: 3V ~ 5V DC
Viewing angle: greater than 160 degrees
Support many control chips: for Arduino, for 51 Series, for MSP430 Series, for STM32 / 2, for CSR IC, etc.
How to connect?
GND: OLED Power Ground
VCC: OLED Power Positive 3.3-5V
SCL: OLED IIC Clock Line
SDA: OLED IIC Data Line
3* 0.96 Inch I2C OLED Display
0.96″ SSD1306 128X64 OLED LCD Display with IIC/I2C Interface-4PIN.
Due to the high resolution of 128 x 64 pixels, the display offers a lot of space to display elements!
Easy connection of the display for Arduino, for Raspberry Pi, for 51 Series, for MSP430 Series, for STM32 / 2, CSR IC, etc.. Only through I2C interface via four pins!
128×64 pixel: please comment the default display type #define SSD1306_128_32 and uncomment #define SSD1306_128_64 at line 73 and 74 of the driver header file Adafruit_SSD1306.h. Then the 128×64 pixel can be displayed normally.
Tip: The blue and yellow areas are fixed and cannot be reset. The yellow area is the upper row, and the lower area is blue, as shown in the picture.