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Version: 2.8

LILYGO® T-Watch

The T-Watch S3 is a compact wearable device featuring a 1.54-inch IPS LCD touch screen with a resolution of 240x240 pixels. It includes haptic feedback, an integrated microphone, speaker, real-time clock, and a three-axis accelerometer.

Specifications​

  • MCUMCU (Microcontroller Unit). The microcontroller that runs the firmware on a device. The hardware tables list the MCU for each supported board.
    • ESP32ESP32A chipset of microcontroller made/designed by Espressif, used by a number of devices. Higher power usage than nRF52, but often cheaper and supports Wi-Fi if desired.-S3 (WiFi & Bluetooth 5 LE)
  • LoRaLoRaA low-power, long-range wireless communication technology used by Meshtastic devices to enable communication over distances of several kilometers without the need for cellular, Wi-Fi, or other traditional network infrastructures. Transceiver
    • Semtech SX1262SX1262A Semtech sub-GHz LoRa transceiver, used in most current Meshtastic hardware and recommended over the older SX127x series.
  • Frequency options
    • 915 MHzMHz (Megahertz). A unit of frequency equal to one million hertz (cycles per second), used to specify the operating frequency of LoRa devices in the Meshtastic network, affecting range and data rate.
    • 868 MHzMHz (Megahertz). A unit of frequency equal to one million hertz (cycles per second), used to specify the operating frequency of LoRa devices in the Meshtastic network, affecting range and data rate.
    • 433 MHzMHz (Megahertz). A unit of frequency equal to one million hertz (cycles per second), used to specify the operating frequency of LoRa devices in the Meshtastic network, affecting range and data rate.
  • Antenna
    • U.FLIPEXA miniature coaxial antenna connector found on many boards. The docs write it as U.FL/IPEX, using the two names interchangeably./IPEXIPEXA miniature coaxial antenna connector found on many boards. The docs write it as U.FL/IPEX, using the two names interchangeably. antenna connector for LoRaLoRaA low-power, long-range wireless communication technology used by Meshtastic devices to enable communication over distances of several kilometers without the need for cellular, Wi-Fi, or other traditional network infrastructures.
  • Connectors
    • Micro-USBUSB (Universal Serial Bus). The wired connection used to power a device, flash firmware onto it, and communicate with it over serial.

Features​

  • 1.54 inch ST7789V TFT LCD (Resolution: 240 x 240)
  • DRV2605 Haptic Driver
  • I2S Speaker/Microphone & MAX98357 I2S Amp
  • AXP2101 PMU and 400mAh battery.
  • BMA423 Three Axis accelerometer
  • Real-Time Clock

Flashing​

To flash ESP32ESP32A chipset of microcontroller made/designed by Espressif, used by a number of devices. Higher power usage than nRF52, but often cheaper and supports Wi-Fi if desired.-S3 devices like the T-Watch, you typically need to place them in Espressif's firmware download mode. Use the "1200bps reset" button in the web flasher to do this. If this method does not work for any reason, you can follow the manual process below.

warning

Do not proceed unless an antenna is connected to avoid possible damage to the device's radio.

The following process will manually place the device into the Espressif Firmware Download mode:

  1. Ensure the device is powered off by pressing and holding the crown button.
  2. Remove the device's back cover.
  3. Locate and press and hold the boot button.

T Watch S3 Boot Button

  1. While holding the boot button, press the crown button once to turn the device on.
  2. After 2-3 seconds, release the BOOT button.

With the device now in the Espressif Firmware Download mode, you can proceed with flashing using one of the supported flashing methods. It's generally recommended to use the Web Flasher. You can select "T Watch S3" from the device drop-down.

Resources​

  • Firmware file: firmware-t-watch-X.X.X.xxxxxxx.bin

T-Watch