Trying out a small OLED module from Amazon: CenryKay 12864.

Testing these serial OLED modules in all three of their serial modes. I2C, 3 wire SPI and 4 wire SPI. Showing which resistors to put in and which to remove to switch to the different modes.

Link to MPLAB X dsPIC33CK256MP206 project to interface to these modules:

https://github.com/mlplel/SSD1306Serial.X