But I don't understand ScruffR plan - I found the instructions on the silk, but don't understand the context from I2C to R1 to R8.
I repeat my understanding: this OLED supports 2 methods and the first is 4Wire SPI (missing schematic).
To use it in the 2nd method "I2C" I need one/more resistors (missing schematic).
I followed this thread, but this schematic with Software SPI will not work.