SSD1306 based OLED connected to Arduino
A few weeks ago i bought one of these cheap "I2C OLED 0.96 inch displays" on eBay. Since it took me a while to get it up and running, i want to share my insights to you. I will give three example sketches, each using a different library (Adafruit, u8g and hobby components).
Although it was sold as an I2C display, it turned out that it operates as an SPI device as default. If you look at the back side, you can see that it is in "4SPI" mode. I2C operation will be researched in another post later.
- Display technology: OLED
- Size: 0.96"
- Resolution: 128x64
- Protocol: SPI
- Chipset: SSD1306
The display has the following pins: GND, VCC, D0, D1, RES, DC, CS. Since pin names are often named differently, i will give an overview of commonly used names for refernce:
| Pin | Alternate Names | Description |
|---|---|---|
| VCC | ||
| GND | ||
| D0 | SCL,CLK,SCK | |
| D1 | SDA,MOSI | |
| RES | RST,RESET | |
| DC | A0 |
I got the display working with three different libraries:
- Adafruit
- u8g
- hobby components