LILYGO has recently introduced the T-Watch S3 Plus, an ESP32-S3 smartwatch which can be considered an upgrade from the previous generation T-Watch S3, adding a u-blox MIA-M10Q GPS and a larger 940mAh LiPo battery for extended battery life.
The T-Watch S3 Plus smartwatch still supports Wi-Fi, Bluetooth LE, and LoRa connectivity, and integrates a 1.54-inch 16-bit full-color TFT LCD display with capacitive touch and a wide-viewing angle. The smartwatch also features an infrared (IR) transmitter that can be used for remote control or proximity detection.
T-Watch S3 Plus specifications
- Wireless MCU – Espressif Systems ESP32-S3
- CPU – Dual-Core 32-bit Tensilica LX7 @ up to 240 MHz with vector instructions for AI/ML acceleration
- Memory – 512KB SRAM, 8MB PSRAM
- Storage – 16MB flash, 384KB ROM
- Wireless – Wi-Fi 4 and Bluetooth 5 LE/Mesh
- Display – 1.54-inch 16-bit full color TFT LCD display with 240×240 resolution, capacitive touch; ST7789V SPI controller
- Audio – Built-in PDM microphone, MAX98357A Class D audio amplifier
- Wireless Connectivity
- 2.4 GHz Wi-Fi 4 (802.11 b/g/n) and Bluetooth 5.0 with BLE on ESP32-S3
- LoRa
- Semtech SX1262 LoRa RF transceiver supporting 433 MHz, 868 MHz, 915 MHz ISM frequencies OR
- Semtech SX1280 2.4GHz LoRa RF transceiver
- MIA-M10Q GPS module featuring a multi-GNSS engine with support for BeiDou, Galileo, GLONASS, and QZSS
- USB – 1x Micro USB OTG port
- Sensors
- 12-bit BMA423 triaxial (3-axis) Acceleration Sensor
- IR blaster (IO02)
- Misc
- Power button (2S press: ON; 6S press: OFF)
- RTC clock
- DRV2605 haptic motor
- IR transmitter
- Power Supply
- Battery – 940mAh LiPo
- Integrated PMU AXP2101 PMIC
- Dimensions
- Watch Face – 51.5 x 42 x 20 mm
- Strap – 305 mm long
Since the watch is built around the ESP32-S3 MCU, it can be programmed with the Arduino IDE, the ESP-IDF framework, or MicroPython. However, in terms of documentation and software support, the company only provides the TTGO TWatch Arduino Library, which includes example codes for display, LVGL, RadioLib, GPS, and various peripherals, along with setup guides and troubleshooting steps for flashing firmware and configuring the ESP32-S3 smartwatch.
The T-Watch S3 Plus is available on AliExpress for about $75, or on the company’s store for $58.74.
Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication
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