@katak255 I tried that and no luck here. Looks like I will have to figure out what's going on or try to use u8g2 driver (although that would probably require to solve the same issue - timing and correct communication order).
Just for info, the SH1106 works flawlessly on SSD1306![:D]( "Very Happy")
Just for info, the SH1106 works flawlessly on SSD1306
Statistics: Posted by Janez — Sun Dec 15, 2024 4:28 pm