Waveshare Core2021-LF Dual-Band LoRa Module, LR2021 Transceiver 410-510MHz
Waveshare Core2021-LF Dual-Band LoRa Module, LR2021 Transceiver 410-510MHz - Image 2
SKU: IOWC-1658
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Waveshare Core2021-LF Dual-Band LoRa Module, LR2021 Transceiver 410-510MHz

₹1,399.00 (Inclusive of all taxes)
Out of Stock

The Waveshare Core2021-LF is a dual-band LoRa module based on the LR2021 transceiver, operating in the 410–510 MHz LF Sub-GHz band. It supports multiple protocols including LoRa, FLRC, FSK, BLE, and ZigBee, making it ideal for low-power, long-range IoT deployments with compatibility for ESP32, STM32, Arduino, and Raspberry Pi platforms.

Features

  • Multi-Protocol LR2021 Transceiver: Supports LoRa, FLRC, FSK, BLE, and ZigBee for flexible IoT network design across Sub-GHz and 2.4GHz bands.
  • Extended LF Sub-GHz Range: Operates from 410–510 MHz with up to 22dBm output power and -141.5dBm sensitivity for robust 5km+ links.
  • Low-Power LPWAN Operation: Optimized for battery-powered nodes with RX current as low as 5.8mA and support for LoRaWAN gateway connectivity.
  • SPI Interface & Broad MCU Compatibility: Simple SPI communication enables easy integration with ESP32, STM32, Arduino, Raspberry Pi, and Raspberry Pi Pico.
  • Complete RF Kit: Includes IPEX-4 to SMA cable, 2dBi SMA antenna, and 2.4GHz antenna for immediate deployment and testing.

Out of stock

Description

The Waveshare Core2021-LF module integrates Semtech’s fourth-generation LR2021 multi-band transceiver, engineered for scalable LPWAN and industrial IoT systems. Its dual-band architecture supports the 410–510 MHz LF spectrum alongside 2.4GHz ISM bands, providing developers with frequency agility for global compliance and interference mitigation. The chip’s multi-protocol radio core handles LoRa, FLRC, FSK, BLE, and ZigBee modulation, allowing a single hardware platform to serve diverse wireless topologies from star networks to mesh.

Designed for low-power operation, the module delivers a maximum RF output of 22dBm in the Sub-GHz band while maintaining efficient current consumption, critical for solar-powered or battery-operated remote sensors. The integrated TVS protection and IPEX-4 connector with castellated pads ensure reliable antenna coupling and ESD resilience in harsh environments. With its compact 19x22mm footprint and comprehensive driver support for popular embedded platforms, the Core2021-LF accelerates development of telemetry, automation, and environmental monitoring solutions requiring kilometer-scale wireless reach.

Key Features

  • LR2021-based dual-band transceiver supporting Sub-GHz (410-510MHz) and 2.4GHz ISM bands for global deployment flexibility.
  • Multi-protocol radio engine compatible with LoRa/FLRC for long-range LPWAN and FSK/BLE/ZigBee for short-range, high-data-rate applications.
  • High-power 22dBm transmit output coupled with exceptional -141.5dBm receiver sensitivity for extended communication range exceeding 5km.
  • Ultra-low power consumption design with RX current as low as 5.8mA, ideal for battery-powered IoT edge nodes and sensors.
  • Standard SPI communication interface ensures seamless integration with a wide range of microcontrollers and single-board computers.
  • Integrated TVS protection on the antenna line and IPEX-4 connector with castellated holes for robust RF performance and mounting options.
  • Comprehensive development resources and example code provided for ESP32, STM32, Arduino, Raspberry Pi, and Raspberry Pi Pico.

Applications

  • Industrial IoT telemetry and wireless sensor networks for monitoring equipment health, tank levels, and production metrics.
  • Smart agriculture systems for soil moisture sensing, livestock tracking, and automated irrigation control over wide areas.
  • Environmental monitoring networks measuring air quality, water parameters, weather data, and seismic activity in remote locations.
  • Smart home and building automation for wireless control of lighting, security sensors, and energy management systems.
  • Asset tracking and fleet management solutions providing long-range, low-power location and status updates.

Technical Specifications

Transceiver ChipLR2021
Frequency Range410–510 MHz (LF Sub-GHz), 2.4GHz ISM
Supported ProtocolsLoRa, FLRC, FSK, BLE, ZigBee
RF Transmit PowerUp to 22 dBm (Sub-GHz)
Receiver Sensitivity-141.5 dBm (Sub-GHz, LoRa)
Supply Voltage3.3V (Maximum 3.7V)
Operating Current (TX)105 mA @ 22dBm
Operating Current (RX)5.8 mA @ 125KHz
Communication InterfaceSPI
Antenna ConnectorIPEX-4 & Castellated Holes
Maximum Data RateUp to 2.6 Mbps
Typical Range5 km (Sub-GHz), 2 km (ISM)
Dimensions19.00 x 22.00 mm

Frequently Asked Questions

What microcontrollers are compatible with the Core2021-LF module?

The module uses a standard SPI interface, making it compatible with most microcontrollers. Official examples and libraries are provided for ESP32, STM32 (via HAL/LL), Arduino boards, Raspberry Pi (using SPI via Linux), and Raspberry Pi Pico. You will need to connect the module's SPI pins (SCK, MOSI, MISO, NSS) and a DIO0 interrupt pin to your host MCU, then install the appropriate LR2021 driver or Semtech SX126x-compatible library to begin development.

How do I configure the module for LoRaWAN operation?

To use the Core2021-LF with LoRaWAN, you must first initialize the LR2021 transceiver via SPI commands, setting the frequency band (e.g., 868MHz EU or 915MHz US), SF, and bandwidth parameters. Then, integrate a LoRaWAN stack (like LoRaMac-node, Mbed LoRaWAN, or Arduino LMIC) on your host MCU. The stack will handle OTAA/ABP activation, MAC commands, and uplink/downlink scheduling with your chosen LoRaWAN network server (The Things Stack, ChirpStack, etc.). Ensure your antenna is matched to your selected Sub-GHz frequency.

What is the power supply requirement and how do I minimize current draw?

The module requires a stable 3.3V power supply (maximum 3.7V) and is not 5V tolerant. For lowest power consumption, utilize the LR2021's built-in sleep modes (e.g., deep sleep) when the radio is idle. Configure the host MCU to wake the module via SPI only during scheduled transmission or reception windows. The module draws approximately 105mA during a 22dBm transmit burst and around 5.8mA in active RX mode; sleep currents are in the microamp range. A high-quality LDO or switching regulator is recommended for battery-powered designs.

Package Includes

  • 1 x Waveshare Core2021-LF Dual-Band LoRa Module
  • 1 x IPEX4 to SMA Cable
  • 1 x 2dBi SMA Antenna
  • 1 x 2.4G Antenna

Additional Information

Weight 0.012 kg
Dimensions 25 × 21 × 7 cm

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