LILYGO T-TWR Rev2.1
LILYGO T-TWR Rev2.1 is an ESP32-S3 based programmable walkie-talkie board featuring the SA868 UHF/VHF radio module, GPS, OLED display, and battery support for amateur radio applications.
$48.99
Tap any value to browse matching devices
Specifications
Components
SA868 UHF/VHF radio module available in 400-480 MHz (UHF) or 134-174 MHz (VHF) variants for amateur radio and walkie-talkie applications
Quectel L76K GNSS module supporting GPS, BDS, and GLONASS with built-in LNA, SAW filter, AGNSS, and 1PPS output
1.3 inch OLED display driver with 128x64 resolution connected via I2C (SDA: IO08, SCL: IO09)
AXP2102 PMU for battery charging and power distribution across the board
Bus Interfaces
Overview
The LILYGO T-TWR Rev2.1 is revision 2.1 of the T-TWR programmable walkie-talkie platform. It uses the ESP32-S3-WROOM-1-N16R8 module (16MB flash, 8MB PSRAM) paired with the SA868 UHF/VHF transceiver module available in 400–480 MHz or 134–174 MHz variants. A Quectel L76K GNSS module provides GPS, BDS, GLONASS positioning. The 1.3" SH1106 OLED display with 128×64 resolution is included for status display. Power is provided via USB, 21700, or 18650 battery. Onboard features include a PMU AXP2102, TF card slot, WS2812 RGB LED, and 4 buttons. Compatible with SoftRF Ham Edition, OpenRTX, ESP32APRS, and ArcticTracker firmware. Note: OpenRTX currently only supports version 2.0, not 2.1.
Use Cases
5Amateur Radio
Ham radio experimentation including digital modes, APRS, and RF communication projects.
APRS Tracking
Automatic Packet Reporting System tracking for amateur radio position and telemetry reporting.
Walkie-Talkie
Build a digital or analog walkie-talkie with two-way voice communication.
GPS Tracking
Location tracking and navigation using GNSS satellite receivers.
LoRa Mesh Networking
Building off-grid mesh communication networks using LoRa radio for text messaging, location sharing, and sensor data relay without cellular or internet infrastructure.
Where to Buy
Explore more of the directory — popular use cases, firmware, and specs to browse next.
