Show HN: PaperMono, e-ink fridge magnet shopping list with mobile web page
PaperMono is an e-ink fridge magnet shopping list device that syncs with a mobile web app, built on an ESP32-S3 with a 3.97" touchscreen. The project details its firmware, featuring fast partial updates, low-power networking, and offline functionality.
Why it matters
This project offers a practical and energy-efficient application of e-paper technology for home organization, providing a convenient solution for managing shopping lists that integrates physical and digital interfaces.
Firmware for the M5Stack PaperMono e-paper device. It turns the device into a household shopping list that lives on the fridge and stays in sync with a phone web app.
The PaperMono is an ESP32-S3 with a 3.97" 480×800 e-paper touchscreen. This project is a complete, working app for it that's small enough to read: about 2,400 lines of C++. You can use it as a shopping list, or as a starting point for your own PaperMono firmware.
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