LilyGo T3 S3 (SX127x)

Name: LilyGo T3 S3 (SX127x)
Brand: LilyGO
Price: 24 USD

Official Active

Compact ESP32-S3 + SX1276 LoRa development board with SSD1306 OLED, micro-SD slot, and Qwiic expansion connector. USB-C with PH2.0 battery connector and optional solar input (V1.3). No on-board BMS — use a protected Li-ion cell.

~$24 approx.· 2026-06

Product page ↗ Datasheet ↗

References: mesh-sn.de ↗

MCU: ESP32-S3
Radio: SX1276
Display: 0.96″ OLED
GPS: None
Battery: External
Connectivity: USB, BLE, Wi-Fi

Roles

CompanionRepeaterRoom ServerStandalone Ui

Transports

bleusbwifi

Other variants

Compare all 2 →

T3 S3 (SX126x) esp32-s3· Semtech SX1262

Hardware

Radio

Technology: LORA
Chip: Semtech SX1276 ↗
Frequency: 868 MHz,915 MHz
TX power: 20 dBm
TX efficiency: 0.95 mW/mA
Antenna: IPEX-1.0

Processor

Family: Espressif ESP32 series ↗
Model: Espressif ESP32-S3 ↗
Architecture: Xtensa LX
Flash: 4 MB
RAM: 512 KB
PSRAM: 2 MB

Display

Type: OLED
Controller: SSD1306
Size: 0.96″
Resolution: 128 × 64
Colors: Monochrome

Input

Button: BOOT button (boot mode, customizable)

Battery

Battery: External connector
Built-in: No
Charging: Yes
Connector: PH2.0

Power

Power draw (idle): 25 mA
Power draw (TX): 105 mA

Solar

Solar charging: Supported

Expansion

Port 1: Qwiic (I2C, UART, GPIO)
Port 2: Micro SD

Physical

LEDs: Status LEDs
Dimensions: 75 × 36 × 8 mm
Board area: 27 cm²
Board volume: 21.6 cm³
Weight: 15 g
Operating temp: -40 to 85 °C

Connectivity

USB: USB-C
USB modes: Power, Serial, Flashing
Bluetooth: BLE 5.0
Wi-Fi: 802.11 b/g/n

Details

Kind: Dev Board
Lifecycle: Active
Family: lilygo-t3-s3
Firmware support: 2
Catalog completeness: 91 %
Also known as: T3 S3 SX127x, T3-S3 SX1276, LilyGo T3 S3 (SX1276)

Firmware support

Firmware	Type	Target	Status	Notes
MeshCore (Official)	Official	lilygo_t3s3_sx1276	✓ Supported
MeshCoreNG	Fork	lilygo_t3s3_sx1276	✓ Supported