Reference
Last revision 2025/12/19
This reference guide offers an in-depth look at the 0.91" OLED display libraries, including the u8g2 and DFRobot_GDL libraries, and details the I2C communication protocol, API functions, and MCU compatibility tests. Readers will also find crucial advice on preventing pixel darkening to maintain display brightness uniformity.
Library
- 0.91" 128x32 OLED-A u8g2 Library (About how to install the library?)
- [0.91" 128x32 OLED-A DFRobot_GDL Library] (Not released yet)
Communication Protocol Description
The module uses I2C communication. The I2C address is 0x3C.
API Description
Other Supplementary Information
Turn the pixels off when you are not using the display to prevent the use of some pixels too long to darken them, which will cause the brightness uniformity problem.
- Compatibility Test:
| MCU | Pass | Failed | Not Tested | Remark |
|---|---|---|---|---|
| FireBeetle-ESP32 | √ | |||
| FireBeetle-ESP8266 | √ | |||
| Arduino Uno | √ | |||
| Leonardo | √ | |||
| Mega2560 | √ | |||
| Arduino M0 | √ |
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