T-Watch S3 Plus

Overview

T-Watch S3 Plus is an enhanced version of T-Watch S3, adding GPS functionality. It is a multifunctional smart wearable device integrating high-performance hardware with wireless communication technology, suitable for sports health monitoring, remote interaction, and audio scenarios. Core features include a 1.54-inch 240 × 240 LCD, BMA423 3-axis sensor, capacitive touch, Max98357A audio amplifier and PDM microphone. Available in SX1262 and SX1280 LoRa versions. 51.5 × 42 × 20 mm (without strap).

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
TTGO_TWatch_Library Examples	✓		Watch UI, sensor, and LoRa examples

PlatformIO

1. Install Visual Studio Code and Python
2. Search for and install the PlatformIO IDE extension in VS Code
3. Clone the TTGO_TWatch_Library repository (branch: t-watch-s3)
4. Open platformio.ini and under [platformio] uncomment the desired environment
5. Click ✓ to compile, click → to upload

Arduino

1. Install Arduino IDE
2. Add ESP32 boards URL: https://espressif.github.io/arduino-esp32/package_esp32_index.json
3. In Tools → Board, configure:

Arduino IDE Setting	Value
Board	ESP32S3 Dev Module
Upload Speed	921600
USB Mode	UART0/Hardware CDC
USB CDC On Boot	Enabled
USB Firmware MSC On Boot	Disabled
USB DFU On Boot	Disabled
CPU Frequency	240 MHz (WiFi)
Flash Mode	QIO 80 MHz
Flash Size	16MB (128Mb)
Core Debug Level	None
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
PSRAM	OPI PSRAM
Arduino Runs On	Core 1
Events Run On	Core 1

4. Click Upload

Development Platforms

1. PlatformIO
2. Arduino IDE
3. ESP-IDF
4. MicroPython

Video

Key Features

• ESP32-S3 @ 240 MHz, 16 MB Flash, 8 MB OPI PSRAM, Wi-Fi + BT 5.0
• 1.54-inch LCD (240 × 240), BMA423 accelerometer, capacitive touch
• SX1262/SX1280 LoRa (433–923 MHz), Max98357A audio + PDM mic
• DRV2605 haptic motor, AXP2101 PMU, 51.5 × 42 × 20 mm (without strap)

Product Parameters

Feature	Specification
MCU	ESP32-S3 @ Dual-core LX7, 240 MHz
Flash	16 MB
PSRAM	8 MB (OPI)
Wi-Fi	2.4 GHz 802.11 b/g/n
Bluetooth	Bluetooth 5.0 LE
Display	1.54-inch LCD, 240 × 240 (SPI)
Touch	Capacitive touchscreen (I2C)
Accelerometer	BMA423 (I2C)
LoRa	SX1262 / SX1280, 433–923 MHz (selectable)
Haptic Motor	DRV2605 (I2C)
Power Management	AXP2101
Audio Output	Max98357A amplifier
Audio Input	PDM Microphone
USB	1 × USB + OTG (Micro connector)
Buttons	POWER (hold 2 s on / 6 s off) + BOOT (built-in)
Power Input	5 V / 500 mA
Dimensions	51.5 × 42 × 20 mm (without strap)

Pin Diagram

Dimension Diagram

Schematic

• T-Watch S3 Schematic

Datasheet

• ESP32-S3 Datasheet

Software Development

• TTGO_TWatch_Library GitHub Repository

Dependent Libraries

• TTGO_TWatch_Library

FAQ

• Q. How to power on and off? A. Press and hold the POWER button for 2 seconds to power on, hold for 6 seconds to power off.

• Q. Why does my board keep failing to upload programs? A. Hold BOOT and press RST once, release RST while still holding BOOT, then start the upload.

• Q. Which LoRa versions are available? A. SX1262 (Sub-GHz, 433–923 MHz) and SX1280 (2.4 GHz). Choose according to regional regulations.

Version History

Version	Release Date	Update Description
T-Watch-S3-Plus V1.0	—	Initial version with GPS functionality