Elecrow LoRa Node Expansion Board-nRFLR1121 Integrates nRF52840 for Long Range Communication Support 868/915 Mhz

Elecrow LoRa Node Expansion Board-nRFLR1121 Integrates nRF52840 for Long Range Communication Support 868/915 Mhz

This is a LoRa IoT core module based on the nRFLR1121 main control chip. It integrates a complete LoRa RF transceiver link, supporting 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 868MHz and 915MHz firmware for different regions.

The module is designed with outdoor deployment and rapid prototyping needs in mind. It 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 scenarios. It also integrates two digital, two analog, one I2C, and one UART interfaces, enabling plug-and-play connection to a rich ecosystem of Crowtail sensors such as temperature, humidity, and air quality sensors, quickly building data acquisition nodes. With reserved customizable function buttons and pin headers, this module offers high development flexibility and integration convenience for IoT projects such as weather monitoring, smart homes, and industrial sensing.

User Manual / Datasheet / Example Codes Etc.

Features

• Dual-mode LoRa communication: Based on the nRF LR1121, it simultaneously supports LoRa point-to-point transparent transmission and LoRaWAN network access, supports 868/915MHz.
• Core Communication: Equipped with the nRF LR1121 chip, integrating a complete LoRa transceiver link, supporting both point-to-point and LoRaWAN modes, and offering dual-band selection of 868/915MHz.
• Power Design: Built-in lithium battery management and solar charging interface, providing a durable and green energy solution for unattended outdoor IoT nodes.
• Expansion Interfaces: Provides six standard interfaces: 2x digital, 2x analog, 1x I2C, and 1x UART, enabling rapid integration into the Crowtail sensor ecosystem and easy node construction.
• Development-Friendly: Onboard customizable function buttons and expandable pin headers provide ample flexibility for secondary development, function debugging, and project integration.
• Application Coverage: Suitable for various IoT scenarios requiring long-distance, low-power communication, such as smart agriculture, environmental monitoring, asset tracking, and industrial sensing.

Specifications

• CPU/SoC: nRF52840
• Baseband chip: Semtech LR1121IMLTRT  (nRFLR1121 module)
• System memory: 256KB RAM
• Storage: 1MB Flash (onboard), 8MB Flash (external)
• LoRa Communication
• Processor: nRF52840 processor, single-core 32-bit, 64MHz clock speed
• Receive Sensitivity: -141dBm@SF12/125kHz
• Frequency: 850~930MHz(868MHz, 915MHz compatible) and LoRa 2.4 GHz
• Range: 5~6km, up to 15km max(antenna & environment dependent)
• Other
• Power supply voltage: Typical 5.0 V
• Operating temperature: -30°C to +85°C
• Storage temperature: -30°C to +85°C
• Size: 75*55*7.5(mm)
• Net Weight: 21g

Package Includes

• 1xLoRa Node Board (nRFLR1121)
• 1x LoRa Antenna
• 1x WiFi/2.4G Antenna
• 2x 7pin header