good call! @luz said in SPI SSD1306 Display boot problem: maybe it would make sense to mark the MOSI pin red in the datasheet too? Released v1.9 of Omega2S datasheet and v1.2 of Omega2 datasheet that includes SPI MOSI as a pin that's important for boot and must be floating. @luz said in SPI SSD1306 Display boot problem: And btw., the MT7688 datasheet links you have in the onion docs no longer work Thanks for the heads up! Updated the link to a copy that Onion hosts, so this should work indefinitely.