Microcontroller projects
Arduino library for SSD1322 (parallel mode) over I2C
last updated: 2022-09-09
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OLED display NHD-2.7-12864WDW3
OLED displays are getting cheaper. They need less power, are brighter and have a greater temperature range then LCDs. At mouser I found an 128x64 monochrome display from Newhaven with 2.7' to possibly replace the GTK-281.
The display can be used in parallel mode or over SPI. As I needed I2C I modified the parallel to I2C board from the GTK281 PCB to use it for the new display.
The display is working like a charm, but it is quite slow.
I2C Board
Themqttoledmon_1 board was designed in KiCad. The schematic is already changed, but the PCB has still to be modified in KiCad.
I used the parallel to I2C board from the GTK281 PCB with the following changes:
- No 5V! Connect 5V Pin of Header with 3V
- Connect display pin 19 with display pin 20 (both 3V: 6800 // mode)
- Move Reset from display pin Pin 17 to 16
- Gnd to display pin 17
- BL to display pin 18
Arduino library
To install the library download SSD1322_I2C.zip, from the git page and click in Arduino IDE Sketch > Include Library > Add .ZIP Library....
The library has two examples, the second to set and test the onboard RTC.
Downloads
- Everything on github: https://github.com/weigu1/ardlib_SSD1322_i2c
