LILYGO Watch-Keyboard-C3 V1.0

Overview

The LILYGO Watch-Keyboard-C3 V1.0 is an expansion module that adds a compact QWERTY mini-keyboard to the T-Watch ecosystem. Based on the ESP32-C3 microcontroller, it functions as a standalone wireless keyboard controller or as a T-Watch companion module for text input applications such as messaging, terminal access, and note-taking.

The module ships with a Motor MIC Speaker Module and a 0.5mm Flexible Flat Cable (1x6P) for connecting to T-Watch or other LILYGO boards. An alternative high-value bundle includes a complete T-Watch 2020 V3 smartwatch, providing a ready-to-use smartwatch with keyboard combination.

The ESP32-C3's Wi-Fi and Bluetooth 5.0 LE connectivity enables wireless HID keyboard protocols (BLE HID) for pairing with smartphones and computers, or direct Wi-Fi communication with custom applications. The board can also be used independently as a decorative programmable device.

Firmware Compatibility

The Watch-Keyboard-C3 is compatible with the Arduino IDE using the ESP32-C3 board support package. BLE HID keyboard libraries are available for Bluetooth keyboard emulation. ESP-IDF is also supported. LILYGO's GitHub organization provides reference firmware for the keyboard matrix scanning and connectivity examples.

Flashing Guide

1. Connect via USB Type-C to your computer.
2. In Arduino IDE, select "ESP32C3 Dev Module."
3. Enable "USB CDC On Boot" for serial monitor support.
4. Install required keyboard or BLE HID libraries.
5. Open example code from LILYGO's GitHub.
6. Click Upload; hold BOOT and press RESET if auto-download mode fails.