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The Adafruit MagTag combines the new ESP32-S2 wireless module and a 2.9" grayscale E-Ink display to make a low-power IoT display that can show data on its screen even when power is removed! The ESP32-S2 is great because it builds on the years of code and support for the ESP32 and also adds native USB support so you can use this board with Arduino or CircuitPython!
We designed this board to be low-power friendly - with a spot for a 350 or 420 mAh battery and built-in battery charging over USB C. During deep sleep, with the NeoPixels and speaker amplifier disabled, we measured 250uA power draw so you can run for a few weeks between charges.
And of course, the Mag in MagTag stands for magnetic. We have four M3 standoffs that will work perfectly with these mini magnet feet. (Originally they're designed for RGB Matrices but they'll do an excellent job here as well). Screw on the feet and you can attach this display to a metallic shelf, fridge, or bench.
Here's the cool hardware we put together:
Product Dimensions: 80.0mm x 53.5mm x 12.0mm / 3.1" x 2.1" x 0.5"