LoRaWAN modules
LoRaWAN is a Low Power Wide Area Network (LPWAN) specification intended for wireless battery-operated devices in regional, national or global network. LoRaWAN target key requirements of Internet of things such as secure bi-directional communication, mobility and localization services. This standard will provide seamless interoperability among smart Things without the need of complex local installations and gives back the freedom to the user, developer, businesses enabling the role out of Internet of Things.
LoRaWAN network architecture is typically laid out in a star-of-stars topology in which gateways is a transparent bridge relaying messages between end-devices and a central network server in the back-end. Gateways are connected to the network server via standard IP connections while end-devices use single-hop wireless communication to one or many gateways.
Communication between end-devices and gateways is spread out on different frequency channels and data rates. The selection of the data rate is a trade-off between communication range and message duration. Due to the spread spectrum technology, communications with different data rates do not interfere with each other and create a set of "virtual" channels increasing the capacity of the gateway. To maximize both battery life of the end-devices and overall network capacity, the LoRaWAN network server is managing the data rate and RF output for each end-device individually by means of an adaptive data rate (ADR) scheme.
National wide networks targeting Internet of Things such as critical infrastructure, confidential personal data or critical functions for the society has a special need for secure communication. This has been solved by several layer of encryption.
Protocol: LoRaWAN 1.0, Class A LoRaWAN-ready Frequency:
LoRaWAN EU module: 868 MHz and 433 MHz ISM bands
LoRaWAN US module: 902-928 MHz ISM band
LoRaWAN AU module: 915-928 MHz ISM band
LoRaWAN IN module: 865-867 MHz ISM band
LoRaWAN ASIA-PAC / LATAM module: 923 MHz ISM band
LoRaWAN JP / KR module: 923 MHz ISM band Japan / KR920-923 MHz ISM band
TX power:
LoRaWAN EU module: up to 14 dBm
LoRaWAN US module: up to 18.5 dBm
LoRaWAN AU module: up to 18.5 dBm
LoRaWAN IN module: up to 18.5 dBm
LoRaWAN ASIA-PAC / LATAM module: up to 18.5 dBm
LoRaWAN JP / KR module: up to 16 dBm in Japan / up to 14 dBm in Korea
Sensitivity: down to -136 dBm Range: >15 km at suburban and >5 km at urban area. Typically, each base station covers some km. Check the LoRaWAN Network in your area. Chipset consumption:
LoRaWAN EU module: 38.9 mA
LoRaWAN US module: 124.4 mA
LoRaWAN AU module: 124.4 mA
LoRaWAN IN module: 124.4 mA
LoRaWAN ASIA-PAC / LATAM module: 124.4 mA
LoRaWAN JP / KR module: 96.1 mA
Radio data rate:
LoRaWAN EU module: from 250 to 5470 bps
LoRaWAN US module: from 250 to 12500 bps
LoRaWAN AU module: from 250 to 12500 bps
LoRaWAN IN module: from 250 to 12500 bps
LoRaWAN ASIA-PAC / LATAM module: from 250 to 5470 bps
LoRaWAN JP / KR module: from 250 to 5470 bps
Receiver: purchase your own base station or use networks from LoRaWAN operators
Related API libraries: WaspLoRaWAN.h, WaspLoRaWAN.cpp
All the information about their programming and operation can be found in the LoRaWAN Networking Guide available at Development section of Libelium website.
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