RAKWireless offers a complete suite of LoRaWAN hub modules that integrate the latest Semtech advancements (SX1301, SX1302, SX1303) to deliver high performance, low power, and network reliability. Whether you're building a DIY gateway based on Raspberry Pi or integrating a mini-PCIe solution into an industrial router, these modules address all IoT use cases:contentReference[oaicite:0]{index=0}.
1. RAK831: the “classic” 8-channel hub
The RAK831 is RAKWireless's first-generation 8-channel hub module. Based on the Semtech SX1301, it allows up to eight LoRa frames to be received simultaneously with different spreads, without prior knowledge of the spreading factor. Its SPI or USB connectivity makes it easy to integrate on a Raspberry Pi or any host with these interfaces.
Main features:
- Baseband Processor: Semtech SX1301 (10 demultiplexing paths, 1 FSK):contentReference[oaicite:3]{index=3}.
- Interfaces: SPI (via FT2232H) or USB 2.0, 5V DC power supply.
- Bandwidth: Supports 433 MHz, 470 MHz, 868 MHz, 915 MHz bands.
- Sensitivity: up to –142.5 dBm, max transmit power 23 dBm.
- Dimensions: 80 × 50 × 5 mm, compact PCB format with mounting holes:contentReference[oaicite:4]{index=4}.
Use cases: DIY gateways for private networks, hotspot prototypes, smart metering applications.
2. RAK2245 Pi HAT: Plug-and-play Raspberry Pi hub
The RAK2245 Pi HAT plugs directly into a Raspberry Pi (3B+, 4, Zero) to become a full-featured LoRaWAN hub. Its HAT form factor simplifies installation and powering via the 40 GPIO bus:contentReference[oaicite:5]{index=5}.
Main features:
- Baseband Processor: Semtech SX1301, 8 LoRaWAN global channels:contentReference[oaicite:6]{index=6}.
- GPS: Ublox MAX-7Q module for gateway geolocation, ideal for TTN:contentReference[oaicite:7]{index=7}.
- Interface: GPIO HAT for SPI and 3.3V/5V power supply.
- Thermal regulation: integrated heat sink for continuous use.
Use cases: community hotspots, rapid proof-of-concept, TTN deployments.
3. RAK2247: mini-PCIe SX1301/SX1308 for embedded devices
The RAK2247 brings the same reliability of the SX1301 (or SX1308) into a mini-PCIe form factor for integration into routers or industrial boxes. It combines the hub and USB/SPI interface into a single compact module:contentReference[oaicite:8]{index=8}.
Main features:
- Baseband: Semtech SX1301 or SX1308, 8 channels.
- RF front-ends: 2× SX1255/7 for high/low frequencies.
- Interface: mini-PCIe with FT2232H (SPI→USB), uFL for external antenna.
- Power supply: 3.3V aux per Vaux pin, optimized consumption.
Use case: adding LoRaWAN to a router, edge servers, MPLS/4G equipment.
4. RAK2287: mini-PCIe SX1302 for energy performance
The RAK2287 is based on the new Semtech SX1302, offering lower power consumption, improved thermal management, and an optimized BOM. It also integrates GPS for precise packet timestamping:contentReference[oaicite:9]{index=9}.
Main features:
- Baseband: Semtech SX1302, 8 full-duplex channels.
- GPS: Integrated u-blox for time synchronization.
- Interface: mini-PCIe SPI, with native SPI backhaul option.
- Optimization: reduced consumption, better material cost: contentReference[oaicite:10]{index=10}.
Use cases: low-power industrial gateways, remote edge networks, smart agriculture.
5. RAK5146: mini-PCIe SX1303 with Listen Before Talk (LBT)
The RAK5146 is the most advanced concentrator, based on the Semtech SX1303 and one or more SX126X for LBT, ensuring regulatory compliance and interoperability in high RF density areas:contentReference[oaicite:11]{index=11}.
Main features:
- Baseband: Semtech SX1303, 10 demultiplexing paths, simultaneous transmissions.
- LBT: listen before transmit, spectral optimization in shared bands.
- Interface: mini-PCIe, SPI/USB support, external antenna via uFL.
- Certifications: CE, FCC, SRRC, MIC for global deployment.
Use cases: urban hotspots, private LPWAN operators, integration with operator routers.
6. Summary table of RAKWireless hubs
| Module | Baseband | Form Factor | Channels | Special feature |
|---|---|---|---|---|
| RAK831 | SX1301 | Standalone PCB | 8 | SPI/USB, optimized price |
| RAK2245 Pi HAT | SX1301 | Raspberry Pi HAT | 8 | Built-in GPS, plug-and-play |
| RAK2247 | SX1301/SX1308 | mini-PCIe | 8 | FT2232H, SPI→USB |
| RAK2287 | SX1302 | mini-PCIe | 8 | Low consumption, GPS |
| RAK5146 | SX1303 | mini-PCIe | 10 | LBT, high density |
7. Good design and deployment practices
- Local frequency study : choose SX1302/SX1303 modules for congestive areas.
- Mechanical integration : provide clearance for heat sink and antennas.
- Power supply : Ensure a stable and filtered 3.3V, especially for SX130x.
- Synchronization : Enable GPS for efficient timestamping and OTAA.
- Security : TLS encryption between gateway host and network, VPN if necessary.
- Monitoring : Integrate WisGateOS or a LoRaWAN server for monitoring and updates.
Conclusion
RAKWireless hub modules offer a complete range for all your LoRaWAN needs: from the standalone RAK831 to the latest RAK5146 SX1303 LBT. Each model is distinguished by its form factor, Semtech chipset, and specific features (GPS, power consumption, RF density). Choose the one that matches your infrastructure, node volume, and regulatory constraints to ensure a robust, scalable, and easy-to-maintain IoT network.
