# LILYGO T-Wrist E-Paper

> LILYGO T-Wrist E-Paper is an ESP32-based wearable development board with a 1.54-inch 200×200 e-paper display, vibration motor, optional GPS (LG77 GNSS), WiFi, Bluetooth 4.2, and 3D-printable watch shell.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** ESP32
- **Price:** ~$12.86
- **Product Readiness:** developer
- **CPU:** Xtensa LX6 dual-core @ 240MHz
- **CPU Architecture:** Xtensa LX6 dual-core
- **CPU Cores:** 2
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** None (requires T-U2T adapter)
- **Power:** 5V + LiPo
- **Operating Voltage:** 3.3V
- **Battery:** LiPo (user-supplied, 1.25mm JST)
- **Antenna:** Built-in PCB antenna
- **Display:** 1.54" E-Paper 200×200

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 4.2

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Compatible Firmware

arduino, platformio

## Use Cases

- smart-watch
- wearable
- fitness-tracker
- gps-tracking
- e-reader

## Components

- **ESP32-WROOM-32** (mcu): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, integrated WiFi 802.11 b/g/n and Bluetooth 4.2. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)

## Protocols

- **SPI**
- **I2C**
- **UART**
- **I2S**
- **CAN**
- **SDIO**

## Accessories

- T-U2T Programmer

## Available Software

- **[GxEPD2](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FZinggJM%2FGxEPD2&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)**
- **[LilyGo T-Wristband](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Wristband&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)**

## Description

## Overview

The LILYGO T-Wrist E-Paper is a compact wearable development board built around the ESP32 microcontroller. It features a 1.54-inch SPI e-paper display with 200×200 pixel resolution and a 2-second full refresh time. An integrated vibrating DC motor enables haptic feedback for notifications. WiFi and Bluetooth 4.2 provide wireless connectivity. An optional LG77 GNSS module variant adds GPS, GLONASS, and BeiDou positioning. The board exposes UART, SPI, I2C, CAN, I2S, and SDIO buses, includes battery power detection, a reset button, and one user button. No housing is included, but 3D-printable shell files are available on the GitHub repository. A T-U2T USB-to-serial adapter is sold separately for programming without a built-in USB bridge.

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-wrist-e-paper-1-54-inch-display&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export) — $12.86

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft-wrist-e-paper-1-54-inch-display&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FT-Wristband&ref=openhardware.directory&product=lilygo-t-wrist-e-paper&source=md-export)

## Tags

`e-paper`, `e-ink`, `esp32`, `wearable`, `smartwatch`, `gps`, `gnss`, `vibration-motor`, `1.54-inch`

## Images

![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/bd9e3cbff031.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/87b3c605cead.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/3e030760877b.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/76b9264af259.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/bed0e75e0cc5.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/27347c15ebf7.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/437414ef0b46.jpg)
![LILYGO T-Wrist E-Paper](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t-wrist-e-paper/aa15f39401df.png)

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