Elecrow LoRa Node Expansion Board nRFLR1121 with nRF52840 for Long Range Communication
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Description
The Elecrow LoRa Node Expansion Board nRFLR1121 is a LoRa IoT core module based on the nRFLR1121 main control chip, integrating a complete LoRa RF transceiver link. It supports point-to-point transparent transmission and the standard LoRaWAN network protocol, providing a stable and reliable wireless communication core for various long-range, low-power IoT applications. The module offers firmware for 868MHz and 915MHz for different regions.
Designed for outdoor deployment and rapid prototyping, the module features a built-in lithium battery management circuit and a reserved solar charging interface, supporting energy self-sufficiency and suitable for long-term field monitoring. It integrates two digital, two analog, one I2C, and one UART interfaces, enabling plug-and-play connection to Crowtail sensors such as temperature, humidity, and air quality sensors for fast data node construction. With customizable function buttons and expandable pin headers, it offers extensive flexibility and convenience for IoT projects including weather monitoring, smart home, and industrial sensing.
Features
- Dual-mode LoRa communication based on nRF LR1121 supporting point-to-point and LoRaWAN network access with 868/915MHz support.
- Core communication with nRF LR1121 chip integrating complete LoRa transceiver link and dual-band selection of 868/915MHz.
- Power design includes built-in lithium battery management and solar charging interface for sustainable green energy solution.
- Expansion interfaces: 2x digital, 2x analog, 1x I2C, and 1x UART for Crowtail sensor ecosystem integration.
- Development-friendly onboard customizable function buttons and expandable pin headers.
- Suitable for smart agriculture, environmental monitoring, asset tracking, industrial sensing, smart cities, industrial automation, logistics management, and healthcare applications.
Specifications
| Main Chip | |
| CPU/SoC | nRF52840 |
| Baseband Chip | Semtech LR1121IMLTRT (nRFLR1121 module) |
| System Memory | 256KB RAM |
| Storage | 1MB Flash (onboard), 8MB Flash (external) |
| LoRa Communication | |
| Module | nRFLR1121 Module |
| Processor | nRF52840 processor, single-core 32-bit, 64MHz clock speed |
| TX Power | +20 dBm@Max |
| Receive Sensitivity | -141dBm@SF12/125kHz |
| Link Budget | Supports 166dB link budget |
| Data Transfer Rate | 0.091~62.5Kbps |
| Demodulator | Supports LoRa/(G)FSK/LR-FHSS/Sigfox signal modulation |
| Spreading Factor | SF5~SF12 |
| Frequency | 850~930MHz (868MHz, 915MHz compatible) and LoRa 2.4 GHz |
| Range | 5~6km, up to 15km max (antenna & environment dependent) |
| Other Communication | |
| Satcom | Satcom S-band |
| Bluetooth | Bluetooth 5.3, BLE, mesh network |
| Interface/Button | |
| Interface | 1x Type-C, 1x WiFi/LoRa antenna, 2x digital (D0, D1), 2x analog (A0, A1), Battery interface, Solar cell interface, 1x I2C, 1x UART |
| Button | 1x Reset button, 1x User button |
| LED Indicator | Red: Power, Green: Charging, Blue: User-defined |
| Other | |
| Power Supply Voltage | Typical 5.0 V |
| I/O Port Power Supply Voltage | Typical 3.3 V |
| Clock | 32MHz TCXO |
| Operating Temperature | -30°C to +85°C |
| Storage Temperature | -30°C to +85°C |
| Size | 75*55*7.5(mm) |
| Net Weight | 21g |
Package List
- 1x LoRa Node Board (nRFLR1121)
- 1x LoRa Antenna
- 1x WiFi/2.4G Antenna
- 2x 7pin header
