OLED - Operation:

[last update: 2022-04-10]
Still a work in progress...
OLED - Overview/Specs
OLED - Programming
Electronic Level project
Arduino XIAO
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• This is for 128x32 OLED - Adafruit 4440.
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• Load Required Libraries into Arduino IDE:
  • Per Adafruit, two libraries are needed (see below regarding the third): Adafruit_SSD1306, and Adafruit_GFX.
    Open the Arduino library manager:
    In IDE: Sketch > Include Libraries > Manage Libraries
    Search for the Adafruit SSD1306 library and install it
    Search for the Adafruit GFX library and install it (may install automatically with SSD1306...)
  • Restart the IDE

  • However I loaded the libraries manually.
    Third library needed: Adafruit_BusIO, also loaded manually,
    though presumably is loaded automatically if you follow the tutorial procedure with library manager.

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• Load the example program into IDE:
  File > Examples
  scroll down to: Examples from Custom Libraries
  Adafruit SSD1306
  select: ssd1306_128x32_i2c
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• For Uno or Nano - Successful:
  • Connect the hardware between OLED and Arduino:
    • 3.3v and gnd
    • i2c CLK (SCL) to A-5
    • i2c Data (SDA) to A4
  • After refining the example program for my preferred format and functions, here's my current default program:
    OLEDtemplate.ino.txt

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• for XIAO - Failed:
  XIAO, Seeeduino

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• for uDuino ... :

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eof