You can shutdown the Pi between refresh cycles, too, but would probably need an external circuit to wake it up again. For microcontrollers, a capacitor and a re

You can shutdown the Pi between refresh cycles, too, but would probably need an external circuit to wake it up again. For microcontrollers, a capacitor and a resistor is usually enough. But if you don’t care about the extra efficiency and don’t want to play with the technology, there is really not much left to justify the e-ink display.