hello, I cant find working library that can do only text.
Library I find or it won't compile or doesn't have support for spi.
original adafruit library causes : Low memory available, stability problems may occur, then oled wont do anything.
conection on 128x64 oled display are: gnd,vcc,cl,mosi,dc,cs
This library is text only and does software SPI via shiftOut:
Here's another one; it does hardware SPI:
I used the first one above as a starting point for my own code.
I added hardware SPI and I2C support and also larger fonts:
thank you thank you
it worked first time compiled and uploaded.
and ram usage 2% haha you are best