This open-source E-Ink smartwatch project trades features for extreme battery life
… At the heart of the device is an ESP32, a low-cost microcontroller known for its Wi-Fi support and ultra-low-power sleep modes. …
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This is the tiniest e-reader in the world, and you can build one yourself
… Since the ESP32 only supports 8MB of onboard storage, the creator has also optimized the space used by system files to make more room for books. …