LilyGO T-Watch S3 ESP32-S3 LoRa 1.54" Touch display watch

Product detailed description

LilyGO T-Watch S3 is an open-source smartwatch-style development kit featuring an ESP32-S3 microcontroller, WiFi, Bluetooth LE 5.0, and an SX1262 LoRa module for long-range communication. The watch features a 1.54" capacitive touch IPS display (240 × 240 px), an accelerometer with a pedometer and gesture recognition, a real-time clock, a microphone, a speaker with an amplifier, a vibration motor, an IR transmitter, and a built-in 470 mAh Li-Po battery with AXP2101 power management. It is a complete watch in a case with a strap – simply connect it to your computer and you can start programming in Arduino IDE, ESP-IDF, PlatformIO or MicroPython. It is suitable for experiments with wearable electronics, off-grid communication via LoRa (e.g. Meshtastic), remote control or custom smartwatch firmware.

Some key features and advantages of the T-Watch S3:

• Complete watch: case, strap and battery are included – you don't need to buy anything else, just a computer and the USB cable from the package.
• LoRa on your wrist: the SX1262 module at 868 MHz enables communication over hundreds of metres to single-digit kilometres with minimal power consumption – ideal for Meshtastic or your own network.
• WiFi and Bluetooth LE 5.0: connection to a home network, MQTT, Home Assistant or a mobile phone.
• Touch display: 1.54" IPS with 450 cd/m² brightness and capacitive touch, graphics can be easily created using LVGL or TFT_eSPI.
• Audio and haptics: PDM microphone, MAX98357A I2S amplifier with speaker and DRV2605 haptic driver with vibration motor for notifications.
• Motion and time: accelerometer with pedometer, wrist-lift and gesture detection, RTC with battery backup.
• IR transmitter: turn the watch into a remote control for televisions, air conditioners and similar devices.
• Low power consumption: approx. 0.5 mA in deep sleep, approx. 50 µA in the off state.
• Open hardware and software: schematics, LilyGoLib library and example projects are freely available on GitHub.

Specifications:

• Microcontroller: ESP32-S3 (dual-core Xtensa LX7, up to 240 MHz)
• Memory:
  • Flash: 16 MB (QSPI)
  • PSRAM: 8 MB (OPI)
• Wireless communication:
  • WiFi: 802.11 b/g/n, 2.4 GHz
  • Bluetooth: BLE 5.0
  • LoRa: Semtech SX1262, 868 MHz
• Display:
  • Type: 1.54" IPS, 240 × 240 px, 262K colours
  • Controller: ST7789V3 (SPI)
  • Brightness / contrast: 450 cd/m², 800:1
  • Touch: capacitive, FT6336U
• Sensors and peripherals:
  • Accelerometer: Bosch BMA423, 3-axis (BMA456 substitution in newer production series)
  • RTC: NXP PCF8563
  • Microphone: PDM, SPM1423HM4H-B
  • Audio: I2S Class D amplifier MAX98357A (3.2 W) with speaker
  • Haptics: DRV2605 driver (ERM/LRA) with vibration motor
  • IR Transmitter: IR12-21C
• Power Supply:
  • Power Management: X-Powers AXP2101
  • Battery: built-in Li-Po 470 mAh, 3.8 V
  • USB Input Voltage: 3.9–6 V
  • Recommended Charging Current: max. 130 mA
• Power consumption:
  • Light sleep: approx. 2.4 mA
  • Deep sleep: approx. 0.5 mA
  • Off: approx. 50 µA
• Controls:
  • Crown: power on by holding for 2 s, power off by holding for 6 s, programmable button during operation
  • BOOT Button: under the back cover, for entering upload mode
  • Battery switch
• Connector: Micro-USB (charging and programming, does not power external devices)
• Programming: Arduino IDE (board "LilyGo T-Watch-S3", Arduino-ESP32 core 3.3 and newer), ESP-IDF, PlatformIO, MicroPython
• Recommended libraries: LilyGoLib, LVGL, TFT_eSPI, RadioLib, XPowersLib, SensorLib
• Water resistance: no
• Colour: Gun Color (dark grey)

Important usage notes:

• On first use, switch the battery switch to the ON position and power on the watch by holding the crown for 2 s.
• If you do not use the watch for a long period, switch the battery switch to the OFF position to prevent unnecessary battery drain.
• The watch is not waterproof – protect it from water, rain, and moisture.
• The pre-installed demo firmware is only for verifying hardware functionality; it is not a finished smartwatch software.
• Do not set the AXP2101 charging current higher than 130 mA in your own program – a higher current may damage the battery.
• If the program cannot be uploaded or the USB port repeatedly connects and disconnects (typically after flashing Meshtastic firmware), switch the watch to upload mode: hold the BOOT button and press the crown for 1 s.
• Do not force open the case and do not mechanically damage the battery; do not expose it to heat or fire. Stop using the watch if the battery swells, emits an odour, or overheats.

Package contents:

• 1× LilyGO T-Watch S3 (868 MHz, Gun Color) with strap and built-in battery
• 1x USB cable

Note:

• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.