Semtech's LoRa USP™ (Unified Software Platform) is a firmware platform designed to support Semtech's LR20xx multi-PHY radios. It provides backward-compatible build options for previous Gen2 SX126x and Gen3 LR11xx devices. The platform offers a unified firmware ecosystem, enabling multiprotocol operations across various MCU platforms through open-source environments such as Zephyr. Learn more about Unified Software Platform (USP)
| Product | Part Number | Status | Version | Product Applicability | Type | Description |
|---|---|---|---|---|---|---|
| USP | SWSD020 | Preferred | V1.1.2 | a. LR20xx: Validated b. LR11xx and SX126x: Buildable |
Protocol library and Bare-metal SDK | Bare-metal based Unified Software Platform offering protocol stacks and examples |
| USP_Zephyr | SWSD021 | Preferred | V1.1.2 | a. LR20xx: Validated b. LR11xx and SX126x: Buildable |
Protocol library and Zephyr-based SDK | Zephyr-based Unified Software Platform offering protocol stacks and examples |
LoRa Basics Modem/Modem-E is an easy-to-use software library that simplifies the development of LoRaWAN® end-nodes in the ISM Sub-GHz and 2.4GHz bands for worldwide interoperability. It provides developers with an event-driven interface at a high level of abstraction. The Software stack is compatible with TS001-LoRaWAN L2 1.0.4 and Regional Parameters RP2-1.0.3 specifications.
The LoRa Basics Modem library targets peripheral MCUs and the LoRa Basics Modem-E offers an embedded stack option hosted in Semtech’s LR1121 3rd generation LoRa® IC. Learn more about LoRa Basics® Modem
| Part Number | Status | Version | Product Applicability | Type | Description |
|---|---|---|---|---|---|
| SWL2001 | Active | 4.8.0 | LR1110, LR1120, LR1121, SX1261, SX1262, SX1268, SX1280, SX1281 | L2 Protocol Library | LoRa Basics® Modem LoRaWAN L2 protocol stack bare metal & ThreadX® |
| SWL2001 (Zephyr)® | Active | 4.8.0 | LR1110, LR1120, LR1121, SX1261, SX1262, SX1268, SX1280, SX1281 | L2 Protocol Library | LoRa Basics® Modem LoRaWAN L2 protocol stack Zephyr OS |
| SWGA003 | Active | 2.0.6 | SX1301, SX1302, SX1302, SX1250, SX1255, SX1257 | Packet Forwarder | LoRa Basics Station - A secure, remotely configurable packet forwarder |
| SWGH004 | Active | 2.1.0 | SX1302, SX1303, SX1250 | Gateway Silicon HAL | Corecell UDP packet forwarder and hardware abstraction layer |
| SWMC01E | NRND | 1.1.8 | LR1110 | Silicon Microcode | LR1110 Modem-E Firmware |
| SWGH003 | Active | 1.1.0 | SX1280 | Gateway Silicon HAL | 2.4GHz Gateway Reference Design Hardware Abstraction Layer |
| SWMC02E | Active | 2.0.1 | LR1121 | Silicon Microcode | LR1121 Modem-E firmware |
| SWGH001 | NRND | 5.0.1 | SX1301, SX1257 | Packet Forwarder | SX1301 UDP packet forwarder and hardware abstraction layer for v1.0 and v1.5 reference designs |
| Part Number | Status | Version | Product Applicability | Type | Description |
|---|---|---|---|---|---|
| SW3P002 | New | 2.9 | SX1261, SX1262, SX1268, LLCC68 | SDK | Nordic Sidwalk extension for nRF Connect SDK |
| SW3P003 | New | 2.2.1 | SX1261, SX1262, SX1268, LLCC68 | SDK | Silicon Labs Simplicity Studio Extension for Amazon Sidewalk |
| SW3P004 | New | N/A | SX1262, LR1110 | SDK | STM32 Amazon Sidewalk SDK |
| Part Number | Version | Product Applicability | Type | Description |
|---|---|---|---|---|
| SWSD004 | 3.0.1 | LR1110, LR1120 | Software Development Kit | LoRa Edge Demonstrator |
| SWSD003 | 2.3.0 | LR1110, LR1120, SX1261, SX1262, SX1268,LR1120,LR1121 | Software Development Kit | Transceiver SDK |
| SWDM001 | 1.3.0 | LR1110, LR1120, LR1121, SX1261, SX1262, SX1268, LLCC68 | Demonstration | LRFHSS Demonstration & Drivers |
| SWDR003 | 2.3.2 | LLCC68 | Silicon Driver | LLCC68 Transceiver Driver |
| SWDR002 | 2.3.2 | SX1261, SX1262, SX1268 | Silicon Driver | SX126x Transceiver Driver |
| SWDR001 | 2.5.3 | LR1110, LR1120, LR1121 | Silicon Driver | LR11xx Transceiver Driver |
| SWTL001 | 2.5.1 | LR1110, LR1120,LR1121 | Tool | LR11xx Firmware Updater Tool |
| SWMC021 | 1.3 | LR1121 | Silicon Microcode | LR1121 Transceiver Firmware |
| SWMC020 | 2.1 | LR1120 | Silicon Microcode | LR1120 Transceiver Firmware |
| SWMC010 | 4.1 | LR1110 | Silicon Microcode | LR1110 Transceiver Firmware |
| SWEV003 | 1.0.0 | SX1261, SX1262, SX1268, SX1280, SX1281 | Demonstration Kit | SX126x DVK w/Screen Binary |
| SWDM008 | 1.6.0 | SX1280, SX1281 | Demonstration | SX128X Demonstration Firmware Repository |
| SWAP002 | 2.0.3 | LR1110 | Smartphone Application | LoRa EDGE Config iOS App |
| SWDR005 | 1.0.0 | SX1280, SX1281 | Silicon Driver | SX128x Transceiver Driver |
| SWAP001 | 2.1.9 | LR1110 | Smartphone Application | LoRa EDGE Config Android App |
| SWTL00L | 1.2.0 | LR1110, LR1120 | Tool | LR1110 Updater Tool |
| SWEV001 | 3.2.0 | LR1110 | Evaluation Kit | LR1110 EVK Demonstration Application |
| SWDR004 | 3.1.0 | LR1110 | Silicon Driver | LR1110 Modem-E Driver |
| SWDM002 | 1.5.0 | LR1110 | Demonstration | LR1110 Modem-E Application Examples |
| SWGM001 | 1.0.0 | SX1302, SX1303, SX1261 | Gateway Silicon Microcode | SX1302 SPI USB Bridge Example Code |
| SWTL004 | 1.1.0 | LR1110, LR1120, SX1261, SX1262, SX1268 | Tool | LoRaWAN Conformance Test Bench |
| SWMC02E | 5.2.0 | LR1121 | Silicon Microcode | LoRa Basics Modem-E “V2” for LR1121 |
| SWDR009 | 1.0.0 | LR1121 | Silicon Driver | LR1121 Modem-E “V2” C Driver |
| SWTL009 | 0.7.3 | LR1121 | Tool | LR1121 Modem-E “V2” Command Interpreter |
| SWDM022 | 1.0.0 | LR1121 | Demonstration | LR1121 Modem-E “V2” Examples |
Fast Long-Range Protocol (FLRP) Family
The LR2021 introduces a family of fast, long-range transfer capabilities built on Semtech's fourth-generation LoRa® IP. At its core is FLRC, a high-speed modulation delivering up to 2.6 Mbps at LoRa®-class range. On top of FLRC, FLRP adds a LoRa®-synchronized wake-up phase that pre-aligns timing and frequency before each transfer, improving frequency tolerance, virtually eliminating wake-on-noise, and ensuring reliable delivery through automatic acknowledgment and retry. The result is a single chip that can serve everything from image transfers to firmware updates and sensor uploads, without sacrificing the sensitivity and power efficiency that make LoRa® the platform of choice for IoT.
| PROTOCOL |
FLRP-Burst
Connection setup · Adaptive link selection · Burst segmentation · ACK + retry
Optional AES-CMAC integrity |
|
| PHY | LoRa® Wake-on-Radio (WOR) · CAD · Frequency offset measurement · Time synchronization | FLRP-Burst High-speed data burst · Raw packet TX/RX · 0.26–2.6 Mbps · CR 1/2, 2/3, 3/4 · Sub-GHz & 2.4 GHz |
Key capabilities
- Up to 1.7 Mbps effective baud rate @ 2.6 MHz PHY
- 1 km+ range at both Sub-GHz and 2.4 GHz
- Adaptive link with up to 16 channel selection and automatic datarate adaptation
- Up to 16 MB payload per exchange, with automatic multi-burst segmentation
- Reliable delivery: per-burst ACK with selective retransmit over lossy links
- Optional AES-CMAC per-packet integrity, replacing the radio CRC
- Sub-GHz and 2.4 GHz frequency bands
Ready to get started? Explore the FLRP-Burst User Guide for full setup and configuration details.
Use cases
- Security cameras Alarm verification: multi-year battery-powered PIR + camera - send snapshot/clip on alarm for verification.
- Firmware & config: fast OTA download to remote devices.
- Sensor bulk upload: offload logged data in one exchange.
- Long-range file transfer: large payloads, no latency budget.
| Product | Part Number | Status | Product Applicability | Type | Description |
|---|---|---|---|---|---|
| USP | SWSD020 | Preferred | LR2021 | Protocol library and Bare-metal SDK | Bare-metal based Unified Software Platform offering protocol stacks and examples |
| USP_Zephyr | SWSD021 | Preferred | LR2021 | Protocol library and Zephyr-based SDK | Zephyr-based Unified Software Platform offering protocol stacks and examples |
Resources
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Wireless links have traditionally forced a trade-off between speed and range. High-throughput technologies such as Bluetooth and Wi-Fi can move large amounts of data quickly, but their practical range is often limited. Long-range technologies can cover much greater distances, but typically at lower data rates. Fast Long-Range Protocol (FLRP) burst is designed for the gap between these two worlds: a kilometer-class range with megabit-per-second data transfer.
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France's municipalities are moving from pilot projects to full-scale Internet of Things (IoT) deployments and REX TCD Retours d'Expérience – Territoires Connectés et Durables (REX Connected and Sustainable Territories) has become the annual proving ground where that shift gets measured. Olivier Beaujard, Senior Director of the LoRa® Ecosystem at Semtech and Chair of the Board at the LoRa Alliance® attended the 3rd edition of REX TCD, held on June 16–17, 2026, at the Salons de l'Aveyron in Paris. Here’s what the event revealed about the state of connected territory development in France, and why LoRaWAN® is increasingly at the center of it.
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REX TCD 2026 – Connected and Sustainable…Talk With Us Today
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