T-TWR-Plus get it now

Overview

LILYGO T-TWR-Plus is a programmable walkie-talkie development board based on ESP32-S3-WROOM-1 (dual-core LX7, 16 MB Flash, 8 MB PSRAM) with an integrated SA868 UHF radio module (400–480 MHz). It features a 1.3-inch SH1106 OLED, L76K GNSS receiver, PTT button, speaker, microphone, TF card slot, and a 21700 battery holder. Compatible with OpenRTX and APRS, it supports fully custom radio applications over Wi-Fi and Bluetooth 5.0.

Quick Start

Example Support

Example	PlatformIO/Arduino	ESP-IDF	Description
T-TWR	✓		SA868 radio, GPS, OLED, audio examples

PlatformIO

1. Install Visual Studio Code and Python
2. Install PlatformIO IDE extension
3. Open the T-TWR project folder
4. Open platformio.ini, select the T-TWR-Plus environment
5. Click ✓ to compile, connect via USB-C, click → to upload

Arduino

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

Arduino IDE Setting	Value
Board	ESP32S3 Dev Module
USB CDC On Boot	Enable
Flash Size	16MB (128Mb)
Partition Scheme	16M Flash (3MB APP/9.9MB FATFS)
PSRAM	OPI PSRAM
Upload Speed	921600
USB Mode	CDC and JTAG

Key Features

• ESP32-S3-WROOM-1, dual-core LX7 @ 240 MHz, Wi-Fi + Bluetooth 5.0
• SA868 UHF radio module, 400–480 MHz (VHF 136–174 MHz optional)
• 16 MB Flash, 8 MB PSRAM
• 1.3-inch SH1106 OLED (128 × 64, I2C)
• L76K GNSS (GPS/BeiDou/GLONASS)
• PTT button, speaker, microphone
• TF card slot
• 21700 battery holder with charging
• Compatible with OpenRTX, APRS

Specifications

Parameter	Value
SOC	ESP32-S3-WROOM-1, Dual-core LX7 @ 240 MHz
Flash	16 MB
PSRAM	8 MB
Wireless	Wi-Fi 2.4 GHz 802.11 b/g/n, Bluetooth 5.0
Radio	SA868 UHF 400–480 MHz (or VHF 136–174 MHz)
Display	1.3-inch SH1106 OLED, 128 × 64
GNSS	L76K
Storage	TF card slot
Battery	21700 Li-Ion holder
USB	1 × USB-C

Pin Diagram

Dimensions

Schematic

• T-TWR GitHub Repository (hardware)

Datasheet

• ESP32-S3 Datasheet

Software Libraries

• T-TWR GitHub Repository

Compatible Firmware

• OpenRTX — open-source radio firmware
• ESP32APRS T-TWR — APRS support

FAQ

• Q. What frequencies does it support? A. The standard T-TWR-Plus uses the SA868 UHF module (400–480 MHz). A VHF version (136–174 MHz) is also available.

• Q. Can it transmit on amateur radio frequencies? A. The SA868 module is capable of FM voice transmission. Ensure you have the appropriate amateur radio license for your region.

Changelog

Version	Date	Notes
V1.0		Initial release