# LILYGO T3 S3 LR1121

> LILYGO T3 S3 LR1121 is an ESP32-S3 development board with a Semtech LR1121 multi-band transceiver supporting sub-GHz (830–940 MHz) and 2.4 GHz LoRa, plus a 0.96" OLED display and microSD card slot.

## Quick Facts

- **Brand:** LILYGO
- **Board Type:** dev-board
- **Price:** ~$23.98
- **Product Readiness:** developer
- **CPU:** ESP32S3FH4R2
- **CPU Architecture:** Xtensa LX7 dual-core
- **PSRAM:** 2MB
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** 5V
- **Operating Voltage:** 3.3V
- **Antenna:** U.FL/IPEX
- **SD Card:** microSD
- **Display:** 0.96" OLED 128x64

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 5.0
- **Lora:** LR1121 830-940MHz/2.4GHz

## Open Source

- **Firmware:** Yes
- **Schematics:** No
- **PCB Layout:** No

## Use Cases

- multi-band-lora-iot
- sub-ghz-communication
- 2.4ghz-lora-mesh
- global-iot-deployment
- long-range-sensor-network

## Components

- **ESP32-S3FH4R2** (mcu): ESP32-S3 dual-core LX7 microcontroller with 4MB flash, 2MB PSRAM, Wi-Fi, and Bluetooth 5.0 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s3_datasheet_en.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- **LR1121** (radio): Semtech LR1121 multi-band transceiver supporting sub-GHz (830–940 MHz) and 2.4 GHz LoRa bands for flexible global deployment — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fsemtech.com%2Fuploads%2Fdocuments%2Fds_lr1121.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- **SSD1306** (display-driver): 0.96 inch SSD1306 I2C OLED display with 128x64 resolution, connected via I2C (SDA: IO18, SCL: IO17) — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)

## Protocols

- **I2C**
- **SPI**
- **UART**
- **GPIO**

## Description

## Overview

The LILYGO T3 S3 LR1121 combines the ESP32S3FH4R2 microcontroller with the Semtech LR1121 multi-band radio transceiver. The LR1121 supports both sub-GHz (830–940 MHz) and 2.4 GHz LoRa bands, making it suitable for global multi-band deployments. The board includes a 0.96" SSD1306 OLED display (128×64) via I2C, microSD card slot, and USB charging at 500mA/5V. Physical dimensions are 66×36mm. Development is supported via the LilyGo LoRa Series GitHub repository with Arduino and ESP-IDF examples.

## Where to Buy

- [LILYGO Official](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-lr1121&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export) — $23.98

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Flilygo.cc%2Fproducts%2Ft3-s3-lr1121&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FXinyuan-LilyGO%2FLilyGo-LoRa-Series&ref=openhardware.directory&product=lilygo-t3-s3-lr1121&source=md-export)

## Tags

`esp32-s3`, `lr1121`, `lora`, `multi-band`, `2.4ghz`, `sub-ghz`, `oled`, `development-board`

## Images

![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/0c13741f4608.jpg)
![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/f51fcf984b98.jpg)
![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/1180abb51ff0.jpg)
![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/19ababf83e13.jpg)
![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/a8d62d63e47d.jpg)
![LILYGO T3 S3 LR1121](https://nbg1.your-objectstorage.com/openhardware-directory/entities/lilygo-t3-s3-lr1121/aa15f39401df.png)

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