T-Watch Ultra get it now

Overview

T-Watch Ultra is a high-performance smart watch development module based on ESP32-S3 (16 MB Flash, 8 MB OPI PSRAM). Features a 2.06-inch AMOLED display (410 × 502, QSPI), BHI260AP AI motion sensor, MIA-M10Q GNSS, ST25R3916 NFC, SX1262/SX1280 LoRa, MAX98357A audio, DRV2605 haptic, AXP2101 PMU, XL9555 IO expander, and MicroSD storage. 1100 mAh battery. 63.5 × 49 × 22 mm (without strap).

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
Watch UI	✓		Watch interface example
GNSS Tracking	✓		Satellite positioning
LoRa Communication	✓		LoRa communication test
AI Sensor	✓		Motion recognition
NFC Reader	✓		NFC function demo

PlatformIO

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

Arduino

1. Install Arduino IDE
2. Install Arduino ESP32 V3.3.0-alpha1 or higher
   • Boards Manager URL: https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json
3. Download LilyGoLib and install via Sketch → Include Library → Add .ZIP Library
4. Copy all directories from LilyGoLib-ThirdParty into your Arduino libraries folder
5. In Tools → Board, configure:

Arduino IDE Setting	Value
Board	LilyGo T-Watch-Ultra
Upload Speed	921600
Upload Mode	UART0/Hardware CDC
USB Mode	CDC and JTAG
USB CDC On Boot	Enabled
USB Firmware MSC On Boot	Disabled
USB DFU On Boot	Disabled
CPU Frequency	240 MHz (WiFi)
Core Debug Level	None
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
Board Revision	Radio-SX1262 (or per your RF module)
Arduino Runs On	Core 1
Events Run On	Core 1

Board Revision options: Radio-SX1262 / Radio-SX1280 / Radio-CC1101 / Radio-LR1121 / Radio-SI4432

6. Click Upload

If upload fails, enter download mode: hold BOOT → press RST → release RST → release BOOT → upload → press RST to exit.

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
• 2.06-inch AMOLED (410 × 502, QSPI), CST9217 capacitive touch
• SX1262/SX1280 LoRa, MIA-M10Q GNSS, ST25R3916 NFC, BHI260AP AI sensor
• MAX98357A audio, DRV2605 haptic, AXP2101 PMU, 1100 mAh, 63.5 × 49 × 22 mm

Product Parameters

Feature	Specification
MCU	ESP32-S3 @ Dual-core LX7, 240 MHz
Flash	16 MB
PSRAM	8 MB (Octal SPI)
Wi-Fi	2.4 GHz 802.11 b/g/n
Bluetooth	Bluetooth 5.0 LE
Display	2.06-inch AMOLED, 410 × 502 (QSPI)
Touch	CST9217 Capacitive
LoRa	SX1262 (433–923 MHz) / SX1280 (2.4 GHz)
GNSS	MIA-M10Q Multi-constellation
NFC	ST25R3916
AI Sensor	BHI260AP Motion Sensor
Audio Output	MAX98357A (I2S)
Haptic Motor	DRV2605
Power Management	AXP2101
RTC	PCF85063A
IO Expander	XL9555 (16 IOs)
Communication Module	T3902 (voice call)
Storage	MicroSD (max 32 GB)
Battery	3.7 V, 1100 mAh (4.07 Wh)
USB	1 × Type-C (USB OTG)
Buttons	POWER (hold 2 s on / 6 s off) + BOOT (built-in)
Temperature Range	-40 ~ 85 °C
Dimensions	63.5 × 49 × 22 mm (without strap)

Pin Diagram

Pin Mapping

Name	GPIO
I2C SDA	3
I2C SCL	2
SPI MOSI	34
SPI MISO	33
SPI SCK	35
SD CS	21
RTC (PCF85063A) Interrupt	1
NFC (ST25R3916) CS	4
NFC (ST25R3916) Interrupt	5
BHI260 Interrupt	8
MAX98357A BCLK	9
MAX98357A WCLK	10
MAX98357A DOUT	11
GNSS (MIA-M10Q) TX	43
GNSS (MIA-M10Q) RX	44
GNSS (MIA-M10Q) PPS	13
LoRa Reset	47
LoRa BUSY	48
LoRa CS	36
LoRa Interrupt	14
Display CS	41
Display DATA0	38
Display DATA1	39
Display DATA2	42
Display DATA3	45
Display SCK	40
Display TE	6
Display Reset	37
AXP2101 Interrupt	7

Dimension Diagram

Schematic

• T-Watch Ultra Schematic

Datasheet

• ESP32-S3 Datasheet
• SX1262 Datasheet
• MIA-M10Q GNSS Datasheet
• BHI260AP Datasheet
• AXP2101 Datasheet

Software Development

• LilyGoLib GitHub Repository

Dependent Libraries

• LilyGoLib
• LilyGoLib-ThirdParty
• Arduino_GFX
• LVGL
• RadioLib
• TinyGPSPlus

FAQ

• Q. What advantages does T-Watch Ultra have over other versions? A. The Ultra features a larger AMOLED screen, BHI260AP AI motion sensor, multi-constellation GNSS, NFC, and a larger 1100 mAh battery.

• 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. Which GNSS constellations are supported? A. The MIA-M10Q supports GPS, GLONASS, Galileo, BeiDou, and more.

• Q. Why does my board keep failing to upload programs? A. Enter download mode: hold BOOT → press RST → release RST → release BOOT → upload → press RST to exit.

• Q. No serial output? A. Ensure USB CDC On Boot is set to Enabled.

Version History

Version	Release Date	Update Description
T-Watch-Ultra V1.0	—	Initial version