LILYGO T-Watch S3 Programmable Touchable WIFI BLE LoRa Meshtastic

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⌚ T-Watch S3 by LILYGO – Smart, Customizable, Developer-Ready

The T-Watch S3 by LILYGO is built for makers and innovators 🛠️ who want to explore LoRa 📡 and ESP32-S3 💻 technology in wearable form. Whether you're prototyping IoT solutions, building mesh networks, or crafting smart gadgets, this TTGO watch S3 is:

  • 🔧 Highly customizable

  • 🌐 Versatile across applications

  • 🧪 Perfect for experimentation and STEM projects

From smart communication to real-time control, the T-Watch S3 is your wrist-mounted playground for next-gen ideas. Ready to build something brilliant?

Difference Between T-Watch 2019/2020 V1/2020 V2/2020 V3 and T-Watch-S3

Specifications of the LILYGO T-Watch-S3

MCU ESP32-S3
FLASH 16MB
PS RAM 8MB
Platform Arduino-IDE, ESP-IDF, VS Code, Micropython
Wireless

Wi-Fi: 802.11 b/g/n

Bluetooth: BLE V5.0

Onboard Functions RTC, Microphone, MAX98357A, Power Detection, BMA423 3-axis acceleration sensor
DRV2605 Haptic Driver Motor for ERM and LRA
AXP2101 Highly Integrated Power Management Unit
SX1262 Low Power LoRa Transceiver
Support Baud: 433Mhz, 868Mhz, 915Mhz

Sample Code For Reference [Github]

If you need technical support regarding the LILYGO T-Watch S3 or any TTGO T-Watch products, please check the below link to find more details.

T-Watch_Library

In order to be compatible with multiple versions of T-Watch, all examples include a file. For the first use, you need to define the T-Watch S3 model you use in the file

In the file, you can also see similar definitions, such as LILYGO_WATCH_LVGL, LILYGO_WATCH_HAS_MOTOR, this type of definition, it will be responsible for opening the defined module function, all definitions Will be available view

T-WATCH-2020 document

Micropython ESP32 Firmware Download Address

Tip: You need to turn on the switch when you turn it on for the first time, and it is recommended to turn off the battery switch when it is not used for a long time.

Product Display of the LILYGO T-Watch S3

Color of the T-Watch S3

Size of LILYGO T-Watch S3

Pin Diagram of LILYGO T-Watch S3

LilyGo T-Wacth-S3 Pin Map

Display

ESP32 Attribute Description
GPIO05 CS TFT_CS
GPIO18 SCLK TFT_SCLK
GPIO19 MOSI TFT_MOSI
GPIO27 DC TFT_DC
GPIO12 BL TFT_BL

BMA423

ESP32 Attribute Description
GPIO21 I2C PN532_SDA
GPIO22 I2C PN532_SCL
GPIO39 INT PN532_INT

MAX98357A

ESP32 Attribute Description
GPIO25 I2S I2S_WS
GPIO26 I2S I2S_BCK
GPIO33 I2S I2S_DOUT

AXP202

ESP32 Attribute Description
GPIO21 I2C AXP202_SDA
GPIO22 I2C AXP202_SCL
GPIO35 INT AXP202_INT

Touch

ESP32 Attribute Description
GPIO23 I2C I2C_SDA
GPIO32 I2C I2C_SCL
GPIO38 INT I2C_INT

Motor

ESP32 Attribute Description
GPIO04 1-Wire Motor

Vibration Motor

ESP32 Attribute Description
GPIO04 1-Wire Motor

IR

ESP32 Attribute Description
GPIO13 1-Wire IR

RTC

ESP32 Attribute Description
GPIO37 1-Wire RTC

Serial Chip Description of the T-Watch S3

Matters Needing Attention for TTGO T Watch S3


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