Did you see that the documentation says that this OLED is for "3.3Volts only"?
Do you have a printer controller board which generates 3.3V signals?
Or have you found in the documentation something saying that the signal inputs are 5V tolerant?
Do you have a printer controller board which generates 3.3V signals?
Or have you found in the documentation something saying that the signal inputs are 5V tolerant?