ESP32-S3-LR1121-XF

ESP32-S3-LR1121-HF (Base Version)

The ESP32-S3-LR1121-HF is a low-cost, high-performance microcontroller development board designed by Waveshare. It supports 2.4GHz Wi-Fi and BLE 5, integrates 4MB Flash and 2MB PSRAM, and features an onboard LoRa module. Equipped with various common interfaces, it enables rapid development of LoRa IoT applications based on the ESP32-S3. Its multiple functions and interfaces meet the performance and power consumption requirements of application scenarios such as the Internet of Things (IoT), mobile devices, and smart homes.

ESP32-S3-LR1121-LF (Base Version)

The ESP32-S3-LR1121-LF is a low-cost, high-performance microcontroller development board designed by Waveshare. It supports 2.4GHz Wi-Fi and BLE 5, integrates 4MB Flash and 2MB PSRAM, and features an onboard LoRa module. Equipped with various common interfaces, it enables rapid development of LoRa IoT applications based on the ESP32-S3. Its multiple functions and interfaces meet the performance and power consumption requirements of application scenarios such as the Internet of Things (IoT), mobile devices, and smart homes.

ESP32-S3-LR1121-HF-Kit (USB Type-C adapter board + FFC cable)

The ESP32-S3-LR1121-HF-Kit is a low-cost, high-performance microcontroller development board designed by Waveshare, including an adapter board and FFC cable. It supports 2.4GHz Wi-Fi and BLE 5, integrates 4MB Flash and 2MB PSRAM, and features an onboard LoRa module. Equipped with various common interfaces, it enables rapid development of LoRa IoT applications based on the ESP32-S3. Its multiple functions and interfaces meet the performance and power consumption requirements of application scenarios such as the Internet of Things (IoT), mobile devices, and smart homes.

ESP32-S3-LR1121-LF-Kit (USB Type-C adapter board + FFC cable)

The ESP32-S3-LR1121-LF-Kit is a low-cost, high-performance microcontroller development board designed by Waveshare, including an adapter board and FFC cable. It supports 2.4GHz Wi-Fi and BLE 5, integrates 4MB Flash and 2MB PSRAM, and features an onboard LoRa module. Equipped with various common interfaces, it enables rapid development of LoRa IoT applications based on the ESP32-S3. Its multiple functions and interfaces meet the performance and power consumption requirements of application scenarios such as the Internet of Things (IoT), mobile devices, and smart homes.

SKU	Product
34010	ESP32-S3-LR1121-HF
34011	ESP32-S3-LR1121-HF-Kit
33928	ESP32-S3-LR1121-LF
33929	ESP32-S3-LR1121-LF-Kit

Features

• The ESP32-S3-LR1121-XF is a LoRa development board based on the ESP32-S3 main controller and integrated with the LR1121 RF chip, enabling longer-distance and more stable wireless communication under low power consumption. Compared to traditional LoRa solutions, it offers significant advantages in link reliability, energy efficiency, and multi-band adaptability.

• Leveraging LoRa modulation technology, the system ensures long-distance communication while maintaining good anti-interference performance and ultra-low power consumption. When paired with a LoRa gateway, it can connect to servers like TTN and ChirpStack, facilitating cloud integration and application validation. The main board supports multi-band configuration and a rich set of peripheral interfaces, making it suitable for various IoT scenarios such as outdoor communication, sensor networks, emergency interconnection, and community networking.

Onboard Resources

• Powered by a high-performance Xtensa® 32-bit LX7 dual-core processor, with a main frequency of up to 240 MHz.
• Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE), meeting diverse wireless requirements.
• Features 512KB SRAM and 384KB ROM internally, with stacked 4MB Flash and 2MB PSRAM.
• Utilizes the castellated design for enhanced integration, facilitating user-customized baseboard design.
• Rich peripherals including 4 × SPI, 2 × I2C, 3 × UART, 2 × I2S, and 2 × ADC.
• Equipped with the Semtech LR1121 low-power LoRa transceiver.
• Supports Sub-GHz (150MHz ~ 960MHz), S-Band (1.9GHz ~ 2.1GHz), and 2.4GHz ISM bands.
• Enables connection to the cloud via LoRa or LoRaWAN protocols combined with a gateway, building low-power wide-area networks.
• Supports LoRa, (G)FSK, and LR-FHSS modulation schemes, compatible with SX126x / SX127x frequency bands for easy product upgrades.
• Integrated AES-128 encryption engine enhances data security.
• Onboard TCXO ensures frequency stability under high and low temperature conditions.
• Suitable for IoT applications such as industrial telemetry, smart homes, environmental monitoring, and remote data acquisition.
• Comes with C example programs and a user manual for easy development and rapid application.

Specifications

Item	ESP32-S3-LR1121-HF	ESP32-S3-LR1121-LF
Operating Frequency Bands	850 ~ 930MHz 1900 ~ 2100MHz 2400 ~ 2500MHz	410 ~ 510MHz 1900 ~ 2100MHz 2400 ~ 2500MHz
Modulation	LoRa, (G)FSK, LR-FHSS	LoRa, (G)FSK, LR-FHSS
Communication Rate	LoRa: 0.091 ~ 62.5Kbps (G)FSK: 0.6 ~ 300Kbps	LoRa: 0.091 ~ 62.5Kbps (G)FSK: 0.6 ~ 300Kbps
Transmission Power	-9 ~ 22dBm@Sub-GHz Bands -18 ~ 13dBm@ISM Bands	-9 ~ 22dBm@Sub-GHz Bands -18 ~ 13dBm@ISM Bands
Receive Sensitivity	-127dBm@Sub-GHz Bands, SF=7, CR4_5, BW=125KHz -111dBm@ISM Bands, SF=7, CR4_5, BW=800KHz	-127dBm@Sub-GHz Bands, SF=7, CR4_5, BW=125KHz -111dBm@ISM Bands, SF=7, CR4_5, BW=800KHz
Reference Communication Distance	Sub-GHz Bands: 5km ISM Bands: 2km	Sub-GHz Bands: 5km ISM Bands: 2km
Spreading Factor	SF5 ~ SF12	SF5 ~ SF12
Logic Level	3.3V (Level shifters required for other logic levels)	3.3V (Level shifters required for other logic levels)
Module Current Consumption	Tx Current: 111.2mA@22dBm, 49.6mA@13dBm Rx Current: 9.2mA@125KHz Sub-GHz, 8.1mA@125KHz ISM	Tx Current: 87.7mA@22dBm, 52.7mA@13dBm Rx Current: 9.2mA@125KHz Sub-GHz, 8.1mA@125KHz ISM
Antenna Connector	IPEX-1	IPEX-1
Antenna Protection	TVS Protection	TVS Protection
Operating Temperature	-40 ~ 85℃	-40 ~ 85℃
Interface Type	Castellated / Pin Headers, 2.54mm pitch	Castellated / Pin Headers, 2.54mm pitch
Dimensions	19.00 × 22.00mm	19.00 × 22.00mm

Interface Description

ESP32-S3-LR1121-XF Pinout Table (click to expand)

Signal Function	Macro Name	Corresponding GPIO
Chip Select (CS)	RADIO_CS	GPIO 42
Clock (SCK / CLK)	RADIO_CLK	GPIO 40
Master Out Slave In (MOSI)	RADIO_MOSI	GPIO 45
Master In Slave Out (MISO)	RADIO_MISO	GPIO 46
Reset	RADIO_RESET	GPIO 39
Busy Status	RADIO_BUSY	GPIO 41
Interrupt (IRQ)	RADIO_IRQ	GPIO 38

Dimensions

Development Methods

The ESP32-S3-LR1121-XF supports both the Arduino IDE and ESP-IDF development frameworks, offering developers flexible options. You can choose the appropriate development tool based on your project requirements and personal preferences.

Each method has its advantages, and developers can choose based on their needs and skill level. Arduino is simple to learn and easy to get started with, suitable for beginners and non-professionals; ESP-IDF provides more advanced development tools and stronger control capabilities, suitable for developers with professional backgrounds or those with higher performance requirements, and is more suitable for complex project development.

• Arduino IDE is a convenient, flexible, and easy-to-use open-source electronics prototyping platform. It requires minimal foundational knowledge, allowing for rapid development after a short learning period. Arduino has a vast global community that provides a wealth of open-source code, project examples, tutorials, and rich libraries that encapsulate complex functionalities, enabling developers to implement various features quickly. You can refer to the Working with Arduino to complete the initial setup, and the tutorial also provides related demos for reference.

• ESP-IDF (Espressif IoT Development Framework) is a professional development framework released by Espressif for its ESP series chips. It is developed based on the C language, including a compiler, debugger, and flashing tool, etc. It supports development via command line or an Integrated Development Environment (such as Visual Studio Code with the Espressif IDF plugin), which provides features like code navigation, project management, and debugging, etc. We recommend using VS Code for development. For the specific configuration process, please refer to the Working with ESP-IDF. The tutorial also provides relevant demos for reference.