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Description
ESP32-S3-LR1121 Product Overview
The ESP32-S3-LR1121 LoRa Development Board from Waveshare is a high-performance wireless communication development board based on the ESP32-S3 main controller and integrating the Semtech LR1121 3rd-generation low-power LoRa transceiver. Powered by the Xtensa 32-bit LX7 dual-core processor running at up to 240MHz, ESP32-S3-LR1121 features 512KB SRAM, 384KB ROM, and onboard 4MB Flash and 2MB PSRAM. ESP32-S3-LR1121 supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) for diverse wireless connectivity. The ESP32-S3-LR1121's LR1121 RF chip supports Sub-GHz (150MHz ~ 960MHz), S-Band (2.0GHz ~ 2.1GHz), and 2.4GHz ISM bands, with LF (410MHz ~ 510MHz) and HF (850MHz ~ 930MHz) frequency band options. ESP32-S3-LR1121 features a castellated module design for easy integration into custom carrier boards.
ESP32-S3-LR1121 Key Features
The ESP32-S3-LR1121 LoRa Development Board combines powerful computing capability with advanced wireless communication technology. ESP32-S3-LR1121 features the Xtensa 32-bit LX7 dual-core processor running at up to 240MHz, with 512KB SRAM, 384KB ROM, and onboard 4MB Flash and 2MB PSRAM. ESP32-S3-LR1121 integrates 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 (LE) for dual-mode wireless connectivity. The Semtech LR1121 3rd-generation low-power LoRa transceiver of ESP32-S3-LR1121 supports Sub-GHz (150MHz ~ 960MHz), S-Band (2.0GHz ~ 2.1GHz), and 2.4GHz ISM bands. ESP32-S3-LR1121 offers LF version (410MHz ~ 510MHz, for Asia/Europe) and HF version (850MHz ~ 930MHz, for Europe/Americas/Oceania) frequency options. Supports LoRa, (G)FSK, and LR-FHSS modulation schemes. ESP32-S3-LR1121 features AES-128 encryption engine for enhanced data security. Onboard TCXO crystal oscillator ensures frequency stability under extreme temperature conditions. ESP32-S3-LR1121 provides 4×SPI, 2×I2C, 3×UART, 2×I2S, and 2×ADC rich peripheral interfaces. The castellated module design of ESP32-S3-LR1121 enables easy integration into custom carrier boards. Available in LF/HF frequency versions and Base/Kit package options.
ESP32-S3-LR1121 Applications
With its powerful dual-core processing capability, multi-band LoRa wireless communication, and rich interface resources, the ESP32-S3-LR1121 LoRa Development Board is widely used in:
Industrial Telemetry & Remote Data Acquisition: ESP32-S3-LR1121 leverages Sub-GHz LoRa long-range communication for industrial equipment monitoring, smart metering, pipeline monitoring, and other remote data collection applications
Smart Home & Building Automation: ESP32-S3-LR1121 connects to the cloud via LoRa or LoRaWAN protocols to build low-power wide-area networks for smart lighting, security sensing, environmental control, and more
Environmental Monitoring & Agricultural IoT: ESP32-S3-LR1121 deploys distributed sensor networks for temperature, humidity, air quality, soil parameters, and other environmental data
LoRa Mesh Ad-Hoc Networking: ESP32-S3-LR1121 leverages the LR1121's multi-band support to build flexible and reliable LoRa Mesh networks for emergency communications, community networking, and more
Outdoor Communications & Edge Computing: ESP32-S3-LR1121 combines Wi-Fi/BLE with LoRa communication for edge computing nodes requiring both local processing and remote transmission
Low-Power Wide-Area Network (LPWAN) Nodes: ESP32-S3-LR1121 connects to LoRaWAN servers such as TTN and ChirpStack via LoRa gateways for cloud integration and application validation
ESP32-S3-LR1121 Advantages and Highlights
3rd-Generation LR1121 RF Chip with Multi-Band Global Compatibility: ESP32-S3-LR1121 features the Semtech LR1121 3rd-generation low-power LoRa transceiver supporting Sub-GHz (150MHz ~ 960MHz), S-Band (2.0GHz ~ 2.1GHz), and 2.4GHz ISM bands. ESP32-S3-LR1121 offers LF version (410MHz ~ 510MHz, for Asia/Europe) and HF version (850MHz ~ 930MHz, for Europe/Americas/Oceania) frequency options. ESP32-S3-LR1121 supports LoRa 2.4G for extended range and lower power consumption in global wireless connectivity.
ESP32-S3 Dual-Core 240MHz Powerful Computing: ESP32-S3-LR1121 is powered by the Xtensa 32-bit LX7 dual-core processor running at up to 240MHz, with 512KB SRAM, 384KB ROM, and onboard 4MB Flash and 2MB PSRAM. ESP32-S3-LR1121 supports 2.4GHz Wi-Fi and Bluetooth 5 (LE) dual-mode wireless connectivity.
Multi-Modulation Compatibility for Easy Upgrades: ESP32-S3-LR1121 supports LoRa, (G)FSK, and LR-FHSS modulation schemes. ESP32-S3-LR1121 is compatible with SX126X / SX127X frequency bands for smooth upgrades from traditional LoRa solutions. ESP32-S3-LR1121 connects to the cloud via LoRa or LoRaWAN protocols through gateways for low-power wide-area networking.
Castellated Design for High Integration: ESP32-S3-LR1121 features a castellated module design for easy integration into custom carrier boards. ESP32-S3-LR1121 has compact dimensions of only 21×41mm. Available in Base version and Kit version (with USB port adapter board and FFC cable) package options.
Industrial-Grade Quality & Security: ESP32-S3-LR1121 integrates AES-128 encryption engine for enhanced data security. Onboard TCXO crystal oscillator ensures frequency stability under extreme temperature conditions. ESP32-S3-LR1121 operating temperature range of -40℃ to 85℃. Comes with C example programs and user manual for easy development and rapid application.
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FAQs:
Q: What is the core chip of this development board?
A: The main controller of ESP32-S3-LR1121 is an ESP32-S3 with a dual-core Xtensa LX7 processor, paired with Semtech's third-generation LR1121 LoRa transceiver .
Q: What is the difference between the LF and HF versions?
A: ESP32-S3-LR1121 LF and HF versions operate on different Sub-GHz frequency bands. The LF version of ESP32-S3-LR1121 covers 410-510MHz (Asia/Europe), while the HF version covers 850-930MHz (Americas/Oceania) .
Q: Does it support 2.4GHz communication?
A: Yes, ESP32-S3-LR1121 supports the 2.4GHz ISM band, providing a low-power and globally unified wireless connection for IoT applications .
Q: What is the transmit power in the Sub-GHz band?
A: ESP32-S3-LR1121 adjustable range is from -9dBm to +22dBm, which can be set according to distance and environmental requirements .
Q: What is the estimated communication range?
A: Under ideal conditions, the range of ESP32-S3-LR1121 is approximately 5km in the Sub-GHz band and 2km in the 2.4GHz ISM band .
Q: What is the receiver sensitivity in the 2.4GHz band?
A: For ESP32-S3-LR1121, with a spreading factor of 7 and a bandwidth of 800KHz, the receiver sensitivity is -111dBm .
Q: What interfaces are available for expansion?
A: ESP32-S3-LR1121 features castellated holes for custom integration, including 4×SPI, 2×I2C, 3×UART, 2×I2S, and 2×ADC .
Q: What security features does it have?
A: ESP32-S3-LR1121 includes a hardware AES-128 encryption engine for secure data transmission and TVS protection on the antenna interface .
Q: What are the hardware design highlights?
A: ESP32-S3-LR1121 integrates a TCXO (Temperature Compensated Crystal Oscillator) to ensure frequency stability across the -40℃ to 85℃ temperature range .
Q: Does it support the LoRaWAN protocol?
A: Yes, ESP32-S3-LR1121 can connect to gateways via LoRa or LoRaWAN protocols to establish Low Power Wide Area Networks .