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I can replicate the OP's issue: with two 0.96" OLEDs on an ESP32 Thing Plus C. Using the SPI Hello example, whichever OLED is begun first displays the splash screen successfully. The second is blank ...

They’re controlled by an Arduino Nano which has a built-in inertial measurement unit, allowing it to sense the angle the pipe is being held at as well as making determinations about its movement.

If you’re passionate about embedded programming, real hardware debugging, and seeing your code come to life in physical ...