XIITIA 2pcs 2.42 inch 128x64 OLED LCD Display Module SSD1309 7 Pin SPI/IIC I2C Serial Interface for Arduino UNO R3 (White Light)

Had no issues driving these with a raspberry pico. Display is sharp and bright. Runs on 5vdc perfectly. I switched it to I2C without any issue at all

3 stars, as it is not the right picture. I was expecting these to have the header not soldered and for it to be in the center. These have the header soldered on the left side. So if this will not work for your design look else where. Other than that the price is good and they work.

Not as described. Picture not accurate

I bought these and I've used OLED displays before over SPI. To test, I draw a diagonal line from 0,0 to 127,63. But the test looks weird-- as if I got the height or width wrong by 2x or 0.5x. Maybe there are undocumented config commands needed? What's the right addressing mode (page mode, horizontal, or vertical mode? Can you post some working code to use it? TinyGo, CircuitPython, etc?