The LR2021 LoRa® Evaluation Kit, built around Semtech’s 4th‑generation dual‑band transceiver, enables rapid prototyping of high‑speed, long‑range IoT devices. Supporting both Sub‑GHz and The LR2021 LoRa® Evaluation Kit, built around Semtech’s 4th‑generation dual‑band transceiver, enables rapid prototyping of high‑speed, long‑range IoT devices. Supporting both Sub‑GHz and 2.4 GHz frequency bands for global deployment, it also incorporates FLRC modulation to achieve data rates of up to 2.6 Mbps, making it suitable for applications requiring fast and reliable wireless communication.
Designed for seamless integration into existing development workflows, the LR2021 kit is hardware‑compatible with widely used platforms such as Arduino Uno, STM32 Nucleo, and Nordic DK boards. This ensures smooth, flexible development and accelerates the transition from concept to functional prototype.
Features
- High-Speed Data Breakthrough:
The next-generation Semtech LR2021 not only retains the ultra-long-range communication of traditional LoRa but also introduces FLRC modulation, achieving a remarkable communication rate of up to 2.6 Mbps. This capability extends its use to bandwidth-sensitive applications, such as audio streaming and image transmission.
- Universal Hardware for Global Coverage:
With broad dual-band coverage (Sub-GHz & 2.4GHz) and a switch-less front-end design, a single hardware design achieves global compatibility. This significantly streamlines the design process and accelerates your time-to-market.
- Universal Silicon Platform:
By integrating multiple modulation schemes (LoRa, FLRC, FSK, OQPSK) within a single silicon platform, the LR2021 allows developers to choose the optimal combination for any scenario—from ultra-low-power sensors to high-speed controls. Compatible with Amazon Sidewalk, W-MBUS, Wi-SUN FSK, and Z-Wave.
- Best-in-Class Energy Efficiency & Performance:
LR2021 delivers a generational leap, outperforming predecessors like the SX1262. Lower transmission current and higher receiving sensitivity translate directly into longer battery life and more reliable wireless connections.
- Enhanced Channel Activity Detection (CAD):
The LR2021 employs Fast CAD technology featuring an intelligent adaptive threshold and early termination mechanism, which substantially reduces power consumption and the time required for idle channel detection.
- Ready-to-Go for Prototyping:
This integrated kit combines real-time OLED feedback and plug-and-play Grove connectors for rapid sensor integration. Its hardware is pin-compatible with Arduino Uno, STM32 Nucleo, and Nordic DK platforms.
Note:
Learn more about the next-generation performance of the Semtech LoRa Plus™ LR2021.
Technical Specifications
RF Chip Specifications
| Main Chipset | Semtech LR2021 |
| Package Type | QFN-48 (5x5x0.9 mm) |
| Supply Voltage | 1.8V - 3.7V (3.3V Typical) |
| Sleep Current | 470nA (without RTC) |
| Max TX Current | Sub-GHz: 105mA @ +22dBm; 2.4 GHz: 27mA @ +14dBm |
| Output Power | Up to +22dBm (Sub-GHz) / +12dBm (2.4GHz) |
| RX Sensitivity | LoRa SF12: -141.5dBm; FLRC: -111dBm |
| Communication Interface | SPI |
General Hardware Specifications
| Board Dimensions | 65 x 73 x 27 mm |
| Integrated Display | 0.96" OLED (128 x 64 px) |
| Expansion Interface | 2x Grove I2C, 1x Grove UART |
| Debug Options | SWD, SAMD |
Hardware Overview
Applications
- Global Logistics & Asset Tracking:
Enable seamless global asset tracking. The LR2021 allows devices to automatically comply with regional radio standards, providing uninterrupted data from port to port.
- Wireless Video & Image Transmission:
With FLRC speeds up to 2.6 Mbps, LR2021 sends images within a second, enabling low-power visual monitoring for security and industrial applications.
- Smart Audio Communication:
Makes low-power audio communication practical—enabling safety intercoms on remote worksites and voice-activated sensing in smart environments.
- Converged IoT Networks:
Unify short-range high-speed data collection and wide-area cloud connectivity on a single device, eliminating redundant infrastructure.
- High-Speed OTA Updates:
The high-throughput link ensures rapid Firmware Over-The-Air (FOTA) updates for critical infrastructure sensors with zero downtime.
Part List
| Item | Quantity |
|---|---|
| Wio‑LR2021 Module for 868/915 MHz & 2.4 GHz Bands | x2 |
| Seeed Studio XIAO nRF54L15 Module | x2 |
| LoRa Plus Expansion Board | x2 |
| LF Antenna (868–915 MHz) | x2 |
| HF Antenna (2.4 GHz) | x2 |
| USB Cable Type‑A Male to Type‑C Male (1 m) | x2 |
| U.FL to U.FL RF Coaxial Cable (100 mm) | x2 |
| Read Me Note | x1 |