# qpaperOS — E-Ink Smartwatch Firmware for T-Wrist

> A minimal open-source smartwatch firmware for the LILYGO T-Wrist E-Paper with 3D-printable case, always-on time display, battery status, and deep-sleep for ~4-day battery life.

## Details

- **Difficulty:** intermediate
- **Project Type:** build
- **Board Types:** ESP32
- **Devices:** lilygo-t-wrist-e-paper
- **Firmware:** Arduino, PlatformIO
- **Use Cases:** Wearable, E-Paper & Signage, Display & Dashboard
- **Links:** Github Url: https://github.com/qewer33/qpaperOS

## Tags

`e-paper`, `smartwatch`, `wearable`, `t-wrist`, `3d-printed`, `deep-sleep`, `always-on-display`

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