The pinout ordering is the same for both the 1.27" and 1.5" version of the OLED!
GND -> GND (G)
5v -> VIN (+)
#2 -> SCLK (CL)
#3 -> MOSI (SI)
#4 -> DC
- #5 -> OLEDCS (OC)
#6 -> RST (R)
If you are confused by the abbreviations on the front of the board, the full signal names are printed on the back!
Now we can run the test software on the Arduino.
Three libraries need to be installed using the Arduino Library Manager…this is the preferred and modern way. From the Arduino “Sketch” menu, select “Include Library” then “Manage Libraries…”
Type “gfx” in the search field to quickly find the first library — Adafruit_GFX:
If using an earlier version of the Arduino IDE (pre-1.8.10), locate and install Adafruit_BusIO (newer versions handle this prerequisite automatically).
Then repeat the search and install steps, looking for the Adafruit_SSD1351 library.
For a detailed tutorial on the Adafruit GFX library, including all the functions available please visit the GFX tutorial page