T-Dongle-S3 get it now

Overview

LILYGO T-Dongle-S3 is a feature-rich ESP32-S3 USB dongle development board in a standard USB Type-A plug form factor. It is powered by the ESP32-S3 dual-core Xtensa LX7 (240 MHz) with Wi-Fi 802.11 b/g/n and Bluetooth 5 LE, and packs a 0.96-inch ST7735 IPS color TFT (80 × 160), an APA102 RGB LED, and a TF card slot hidden inside the USB-A connector — all in a compact transparent plastic housing. 16 MB Flash and 8 MB PSRAM provide ample resources for data-rich applications. A JST SH 1.0 mm UART connector and a 1.25 mm battery connector round out the expansion options. Ideal for USB HID gadgets, wireless display sticks, portable data loggers, and educational IoT projects.

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
T-Dongle-S3	✓		Display, TF card, LED, BLE examples

PlatformIO

1. Install Visual Studio Code and Python
2. Search for and install the PlatformIO IDE extension in VS Code
3. Open the T-Dongle-S3 project folder
4. Open platformio.ini and select your example
5. Click ✓ to compile, connect via USB-A, click → to upload

Arduino

1. Install Arduino IDE
2. Install Arduino ESP32
3. In Tools → Board, configure:

Arduino IDE Setting	Value
Board	ESP32S3 Dev Module
Port	Your port
USB CDC On Boot	Enable
CPU Frequency	240 MHz (WiFi)
Flash Mode	QIO 80 MHz
Flash Size	16MB (128Mb)
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
PSRAM	OPI PSRAM
Upload Mode	UART0/Hardware CDC
Upload Speed	921600

4. Click Upload

Development Platforms

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

Related Videos

Key Features

• ESP32-S3 dual-core Xtensa LX7 @ 240 MHz, Wi-Fi 802.11 b/g/n + Bluetooth 5 LE
• USB Type-A plug form factor with transparent plastic housing
• 0.96-inch ST7735 IPS color TFT LCD (80 × 160, 65k colors)
• APA102 RGB LED (SPI-controlled)
• TF card slot integrated inside the USB-A connector housing
• 16 MB Flash, 8 MB PSRAM
• JST SH 1.0 mm 4-pin UART connector
• MX 1.25 mm 2-pin battery connector with charging circuit
• On-board antenna + IPEX connector for external antenna
• Compatible with Arduino IDE, PlatformIO, MicroPython, and Zephyr RTOS

Specifications

Parameter	Value
SOC	ESP32-S3 (Xtensa dual-core LX7, 240 MHz)
Flash	16 MB
PSRAM	8 MB
Wireless	Wi-Fi 802.11 b/g/n, Bluetooth 5 LE
Display	0.96-inch ST7735 IPS TFT, 80 × 160
RGB LED	APA102 × 1
Storage	TF card slot
USB	USB Type-A plug
Battery Connector	MX 1.25 mm 2-pin
UART Connector	JST SH 1.0 mm 4-pin
Antenna	On-board + IPEX
Dimensions	58 × 18 × 9 mm

Pin Diagram

Display (ST7735)

ST7735	BL	CS	SCK	MOSI	DC	RST
ESP32-S3	GPIO38	GPIO4	GPIO5	GPIO3	GPIO2	GPIO1

TF Card

TF Card	CLK	CMD	D0	CS
ESP32-S3	GPIO5	GPIO3	GPIO7	GPIO4

APA102 LED

APA102	CI	DI
ESP32-S3	GPIO40	GPIO39

Button

Button	GPIO
ESP32-S3	GPIO0

Pinout Diagram

Dimensions

Schematic

• T-Dongle-S3 GitHub Repository (hardware)

Datasheet

Software Libraries

• T-Dongle-S3 GitHub Repository

Dependent Libraries

• TFT_eSPI
• FastLED

FAQ

Changelog

Version	Date	Notes
V1.0		Initial release