Lora Module - Libelium Waspmote Technical Manual

11. LoRa module

Protocol: LoRa "raw". P2P links (node to node).
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Model: Semtech SX1272
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Frequencies available: 860-1000 MHz, fits both 868 (Europe) and 900 MHz (USA) ISM bands
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Max TX power: 14 dBm
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Sensitivity: -137 dBm
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Range:
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Line of Sight: 21+ km / 13.4+ miles (LoS and Fresnel zone clearance)
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Non Line of Sight: 2+ km / 1.2+ miles (nLoS going through buildings,
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urban environment)
Antenna:
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868 / 900 MHz: 4.5 dBi
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Connector: RPSMA
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Encryption: AES 128/192/256b (performed by Waspmote API)
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Control Signal: RSSI
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Topology: Star
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Receiver/Central node: Special Gateway LoRa (SPI) or another Waspmote unit
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Note: The LoRa module is provided with a 4.5 dBi antenna, which enables maximum range.
This radio module provides an optimum range performance, thanks to the excellent receiver sensitivity that the
LoRa™ technology offers. Besides, Libelium developed a library which enables addressable, reliable and robust
communications with ACK, re-tries or time-outs strategies.
The user can set any frequency in the 868 and 900 MHz bands, with pre-defined channels. The use of this module
is allowed in virtually any country.
Encryption is implemented in the application level, thanks to the Waspmote's AES library. The payload inside the
wireless packet is encrypted so only nodes knowing the key can read the content. The encryption activation is as
simple as running one of our LoRa with AES encryption examples.
The topology for this type of network is a star topology, as the nodes can establish point-to-point connections
with brother nodes, normally with the central one.
Related API libraries: WaspSX1272.h, WaspSX1272.cpp
All information about programming the LoRa module can be found in the SX1272 LoRa Networking Guide.
All the documentation is located in the
Figure: Star topology
Development section in the Libelium website.
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LoRa module
Figure: LoRa module
v8.2