The ESP32-S3-LR1121-LF is a cost-effective, high-performance microcontroller development board designed by Waveshare. It supports 2.4 GHz Wi-Fi and BLE 5, and features 4MB Flash and 2MB PSRAM, with an integrated LoRa module.
Equipped with a variety of standard interfaces, it enables rapid development of ESP32-S3-based LoRa IoT applications. Its rich features and interfaces meet the performance and power consumption requirements of applications such as IoT devices, mobile devices, and smart home systems.
Key Features
The ESP32-S3-LR1121-XF is built around the ESP32-S3 MCU and integrates the LR1121 LoRa transceiver, delivering longer communication range, higher reliability, and improved energy efficiency compared to traditional LoRa solutions.
With LoRa modulation, the system achieves long-distance communication, strong interference resistance, and ultra-low power consumption. When paired with a LoRa gateway, it can connect to platforms such as TTN and ChirpStack, enabling cloud integration and application development.
The board supports multi-band configuration and provides rich peripheral interfaces, making it suitable for various IoT scenarios including outdoor communication, sensor networks, emergency communication, and community networking.
Onboard Resources
- Xtensa® 32-bit LX7 dual-core processor, up to 240 MHz
- Supports 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE)
- Built-in 512KB SRAM and 384KB ROM
- Integrated 4MB Flash and 2MB PSRAM
- Castellated module design for easy integration
- Rich peripherals:
- 4 × SPI, 2 × I2C, 3 × UART, 2 × I2S, 2 × ADC
- Integrated Semtech LR1121 low-power LoRa transceiver
- Supports Sub-GHz (150–960 MHz), S-band (1.9–2.1 GHz), and 2.4 GHz ISM band
- Supports LoRa, (G)FSK, and LR-FHSS modulation
- Compatible with SX126x / SX127x for easy upgrades
- Built-in AES-128 encryption
- Onboard TCXO for stable performance across temperatures
- Suitable for industrial telemetry, smart home, environmental monitoring, and remote data acquisition
- Comes with C examples and documentation for rapid development
Specifications
| Parameter | ESP32-S3-LR1121-HF | ESP32-S3-LR1121-LF |
|---|---|---|
| Frequency Bands | 850–930 MHz 1900–2100 MHz 2400–2500 MHz | 410–510 MHz 1900–2100 MHz 2400–2500 MHz |
| Modulation | LoRa, (G)FSK, LR-FHSS | LoRa, (G)FSK, LR-FHSS |
| Data Rate | LoRa: 0.091 ~ 62.5 Kbps (G)FSK: 0.6 ~ 300 Kbps | LoRa: 0.091 ~ 62.5 Kbps (G)FSK: 0.6 ~ 300 Kbps |
| Transmit Power | -9 ~ 22 dBm @ Sub-GHz -18 ~ 13 dBm @ ISM | -9 ~ 22 dBm @ Sub-GHz -18 ~ 13 dBm @ ISM |
| Receiver Sensitivity | -127 dBm @ Sub-GHz (SF7, CR4/5, BW 125 kHz) -111 dBm @ ISM (SF7, CR4/5, BW 800 kHz) | -127 dBm @ Sub-GHz (SF7, CR4/5, BW 125 kHz) -111 dBm @ ISM (SF7, CR4/5, BW 800 kHz) |
| Communication Range | Sub-GHz: 5 km ISM: 2 km | Sub-GHz: 5 km ISM: 2 km |
| Spreading Factor | SF5 ~ SF12 | SF5 ~ SF12 |
| Logic Voltage | 3.3V (level shifter required for other voltages) | 3.3V (level shifter required for other voltages) |
| Current Consumption | TX: 111.2 mA @ 22 dBm TX: 49.6 mA @ 13 dBm RX: 9.2 mA (Sub-GHz), 8.1 mA (ISM) | TX: 87.7 mA @ 22 dBm TX: 52.7 mA @ 13 dBm RX: 9.2 mA (Sub-GHz), 8.1 mA (ISM) |
| Antenna Interface | IPEX-1 | IPEX-1 |
| Antenna Protection | TVS Protection | TVS Protection |
| Operating Temperature | -40 ~ 85°C | -40 ~ 85°C |
| Interface Type | Castellated / Pin Header, 2.54 mm pitch | Castellated / Pin Header, 2.54 mm pitch |
| Dimensions | 19.00 × 22.00 mm | 19.00 × 22.00 mm |
Hardware Characteristics
- Antenna Interface: IPEX-1
- Antenna Protection: TVS protection
- Operating Temperature: -40 ~ 85°C
- Interface Type: Castellated / pin header, 2.54 mm pitch
- Dimensions: 19.00 × 22.00 mm
Typical Applications
- Long-range IoT terminals: agriculture, environmental monitoring, smart metering, outdoor equipment
- LoRaWAN nodes and gateways: smart cities, industrial wireless, emergency communication
- Low-power mesh networks: remote areas without cellular coverage
- Multi-mode wireless devices: LoRa + Wi-Fi + BLE hybrid networking with local/cloud data transmission
