[Unit520]

Very cool hack indeed! One thing I learned from this is that having an HDMI port gives you a free I2C port on top as well, as long as you have an old HDMI cable lying around to cut open.

Small note on using these OLEDs with 5V: Typically they expect 3.3V Vcc and logic levels, although almost all of them seem to work just fine with 5V. In my experiments with a regular 5V Arduino some OLED modules made weird coil whining noises, I presume this is from the charge pump circuitry. Driving them with 3.3V as specified removed the coil whine completely.