LILYGO T-WATCH-S3 Plus

LILYGO® T-WATCH-S3 Plus Smartwatch Development Board User Manual

Model: T-WATCH-S3 Plus | Brand: LILYGO

1. Introducció

The LILYGO T-WATCH-S3 Plus is a versatile ESP32-S3-based smartwatch development platform, designed for IoT, wearable applications, and smart device projects. It features 16MB Flash and 8MB PSRAM, supporting multiple development environments, including Arduino-IDE, ESP-IDF, VS Code, and MicroPython. With built-in Wi-Fi (802.11b/g/n), Bluetooth BLE 5.0, and LoRa communication, this smartwatch ensures seamless short-range and long-range wireless connectivity. It features an SX1262 Low Power LoRa transceiver, supporting 433MHz, 868MHz, and 915MHz frequency bands for extended-range data transmission. Additionally, it comes equipped with an RTC clock, microphone, MAX98357A audio decoder, battery voltage detection, BMA423 motion sensor, and GPS positioning, making it a feature-rich device for a variety of applications.

LILYGO T-WATCH-S3 Plus Smartwatch Development Board
Figura 1: Frontal view of the LILYGO T-WATCH-S3 Plus.

2. Notes importants

Important Notes on battery and charging
Figure 2: Visual summary of important notes regarding battery and initial use.
  • The product is shipped with the battery power turned off by default to ensure safety during transportation.
  • If you need to use the device with battery power, please switch on the battery power manually before use.
  • For optimal performance, it is highly recommended to charge the device for at least 2 hours before first use.
  • Improper activation or insufficient initial charging may affect normal operation.

3. Configuració

3.1 Càrrega inicial

Before first use, connect the T-WATCH-S3 Plus to a power source using a compatible USB cable. It is highly recommended to charge the device for at least 2 hours to ensure optimal battery activation and performance. The charging port is located on the side of the watch, as indicated in the pin diagram.

3.2 Encès

The device is shipped with the battery power manually switched off for safety. Locate the battery power switch (if present, typically a small physical switch near the charging port or on the back) and switch it to the 'ON' position. Then, press and hold the Power Button for approximately 2 seconds to turn on the device. The Power Button is located on the side of the watch.

LILYGO T-WATCH-S3 Plus side view mostrant botons i ports
Figura 3: lateral view of the T-WATCH-S3 Plus, highlighting the power button and USB port.

4. Instruccions de funcionament

4.1 Funcions del botó d'engegada

  • Encès: Manteniu premut el botó d'engegada durant 2 segons.
  • Apagar: Manteniu premut el botó d'engegada durant 6 segons.

4.2 Touchscreen Interaction

The T-WATCH-S3 Plus features a capacitive touchscreen display. Interact with the device by tapping, swiping, and holding gestures as defined by the loaded firmware or application. Refer to your specific application's documentation for detailed touchscreen controls.

4.3 Botó personalitzat

A custom button is available on the device. Its functionality is dependent on the firmware loaded onto the development board. Consult the firmware documentation for specific uses of this button.

4.4 USB Port & OTG

The integrated USB port supports both data transfer and On-The-Go (OTG) functionality. This allows for programming the device, debugging, and potentially connecting compatible USB peripherals, depending on firmware support.

5. Especificacions

T-WATCH-S3 Plus Technical Specifications
Figure 4: Detailed technical specifications of the T-WATCH-S3 Plus.
CaracterísticaDetall
MCUESP32-S3
Memòria Flash16 MB
PS RAM8 MB
Development PlatformsArduino-IDE, ESP-IDF, VS Code, MicroPython
Wi-Fi802.11 b/g/n
BluetoothBLE V5.0
LoRa TransceiverSX1262 Low Power LoRa (433MHz, 868MHz, 915MHz)
MostraST7789V 1.54 inch Wide angle IPS LCD, 240x240 resolution, 16-bit full color, 220 ppi, Capacitive touch
Onboard FunctionsRTC, Microphone, MAX98357A Audio Decoder, Battery Voltage Detection, BMA423 Axis Sensor, GPS Position (MIA-M10Q), DRV2605 Haptic Driver Motor, AXP2101 Power Management Unit
Capacitat de la bateria940 mAh

5.1 Dimensions físiques

T-WATCH-S3 Plus physical dimensions
Figure 5: Physical dimensions of the T-WATCH-S3 Plus smartwatch.
  • Watch Body (L x W x H): Approximately 51.5mm x 42mm x 20mm
  • Strap Length: Approximately 305mm
  • Package Dimensions (L x W x H): 15cm x 10cm x 5cm
  • Pes del paquet: 0.2 kg

6. Pin Diagram

The following diagram illustrates the pinout and internal component connections of the T-WATCH-S3 Plus, crucial for advanced development and understanding hardware interactions.

T-Watch S3 Plus Pin Diagram
Figure 6: Detailed pin diagram and component layout of the T-WATCH-S3 Plus.

Key components and their associated GPIOs include:

  • Display (ST7789V 1.54" LCD): TFT_MISO (NULL), TFT_MOSI (IO13), TFT_SCK (IO12), TFT_CS (IO10), TFT_DC (IO38), TFT_RST (NULL), TFT_BL (IO45)
  • LoRa (SX1262): RADIO_SCK (IO03), RADIO_MISO (IO04), RADIO_MOSI (IO01), RADIO_CS (IO05), RADIO_DIO1 (IO09), RADIO_RST (IO08), RADIO_BUSY (IO07)
  • GPS Module (MIA-M10Q): UART_TX (IO41), UART_RX (IO42)
  • RTC Clock: Interrupt (IO17), I2C_SDA (IO10), I2C_SCL (IO11)
  • PMU (AXP2101): Interrupt (IO21), I2C_SDA (IO10), I2C_SCL (IO11)
  • BMA423 Axis Sensor: Interrupt (IO14), I2C_SDA (IO10), I2C_SCL (IO11)
  • PDM MIC: Data (IO47), Sclk (IO44)
  • I2S Class MAX98357A: I2S_BCK (IO48), I2S_WS (IO15), I2S_DOUT (IO46)
  • DRV2605 Haptic Motor: SDA (IO10), SCL (IO11)
  • Capacitive Touch: Interrupt (IO16), I2C_SDA (IO10), I2C_SCL (IO11)
  • IR: IO02

7. Manteniment

  • Neteja: Use a soft, dry cloth to clean the device. For stubborn smudges on the screen, a slightly damp, lint-free cloth can be used. Avoid harsh chemicals or abrasive materials.
  • Emmagatzematge: Guardeu el dispositiu en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
  • Cura de la bateria: To prolong battery life, avoid fully discharging the battery frequently. If storing for an extended period, charge the battery to about 50% and store in a cool, dry place.
  • Resistència a l'aigua: The device is not specified as water-resistant. Avoid exposure to water or high humidity.

8. Solució De Problemes

  • El dispositiu no s'encén:
    • Ensure the battery power switch is in the 'ON' position.
    • Charge the device for at least 2 hours. Improper initial charging can affect operation.
    • Verify the USB cable and power adapter are functioning correctly.
    • Try holding the power button for 2 seconds to turn on.
  • La pantalla no respon:
    • Assegureu-vos que el dispositiu estigui encès i carregat.
    • If the device is frozen, try a hard reset by holding the power button for 6 seconds to turn off, then 2 seconds to turn back on.
  • Connectivity issues (Wi-Fi/Bluetooth/LoRa):
    • Check your firmware settings to ensure wireless modules are enabled and configured correctly.
    • Ensure you are within range of the network/device you are trying to connect to.
    • For LoRa, verify frequency band settings match your region and other devices.
  • Comportament inesperat:
    • This is a development board; unexpected behavior can often be related to the loaded firmware. Review your code and development environment.
    • Refer to the official GitHub repository for known issues or community support.

9. Consells d'usuari

  • Desenvolupament de firmware: Utilize the provided GitHub repository for sample code and detailed information to kickstart your development projects.
  • Suport comunitari: For technical assistance or to discuss development challenges, engage with the LILYGO community on GitHub.

10. Garantia i assistència

10.1 Suport tècnic

For technical support, including questions about development, firmware, or hardware issues, please visit the official LILYGO GitHub community. You can post a description of your problem, and engineers will provide assistance.

GitHub Repository: https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library/tree/t-watch-s3

GitHub Community: https://github.com/Xinyuan-LilyGo

10.2 Informació de la garantia

Specific warranty details are not provided in this manual. Please refer to the seller's terms and conditions or contact LILYGO customer service for warranty-related inquiries.

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