LoRaWAN The Internet of Things in the context of... Nate Argetsinger, Rohan Paul, David Hodgson

LoRaWAN The Internet of Things in the context of... Nate Argetsinger, Rohan Paul, David Hodgson

LoRaWAN The Internet of Things in the context of... Nate Argetsinger, Rohan Paul, David Hodgson

LoRaWAN The Internet of Things in the context of... Nate Argetsinger, Rohan Paul, David Hodgson

History and Context What is IoT today? A big chunk of this is RF Cellular Wifi Bluetooth ANT Proprietary Implementations Many others.. Network topologies increasing in complexity... 6LoWPAN the direct result of increasing requirements

http://www.ti.com/lsds/media/images/wireless_connectivity/20979_6LowPan_mesh.jpg

http://www.ti.com/lsds/media/images/wireless_connectivity/20979_6LowPan_mesh.jpg

“LoRa is a PHY layer implementation and is agnostic with respect to higher-layer implementations.” Quote from Semtech “LoRa Modulation Basics” paper: http://www.semtech.com/images/datasheet/an1200.22.pdf

High Power Low Power Data Rate LoRa Range WiFi GSM/CDMA AKA.. Cellular ANT Bluetooth Low Energy Zigbee, Thread, Zwave LoRa NFC In yo Face In a Household In a City Range (centimeters) (meters) (kilometers)

30mW

Real World Applications Metering Security systems Maintaining automation systems Smart City Why lora is necessary: why other techs wont work

Hierarchy of Communication Generally star of star topology Cloud-based Network Controllers Long range Gateways Multitech Conduit ~ $300 Can have up to a million nodes End-node chips Microchip RN 2483 ~ $15 Can transmit data up to 5 km in city Can last up to 10 years MicroChip and SemTech Link labs and MultiTech

MicroChip RN 2483 First LoRa module to pass LoRaWAN certification ASCII communication via UART MCU for communicating with other end nodes Operates at 3.6V in range 434 - 868 MHz -148 dBm sensitivity at 0.1% BER Only 0.5 – 25 mW signal power output How all the nodes communicate More in slides about how the range/protocol work

LoRa Encoding Scheme Frequency Modulation Frequency-shift Keying (FSK) ~300 kbps Chirp ~11 kbps -couple kinds of signal modulation -chirp is what makes Lora more useful because…

Chirp Frequency modulation over interval Low sensitivity (still distinguishable 20dB below noise floor!) Distinguish between devices Shannon-Hartley: LoRa distinguishable 20dB below noise floor!! C = bitrate

Applications - Possible Implementation Multitech Conduit LoRa Accessory Kit

Applications - Possible Implementation Compatible with ARM mbed for quick development Manage Teams and Respositories Online Compiler https://developer.mbed.org/

Applications - Possible Implementation Online Compiler https://developer.mbed.org/

Applications - Possible Implementation Drag the .bin file directly onto your mDot via USB

Applications - Possible Implementation IBM Node Red to develop server-side implementation

Thanks for listening! Questions? More low level: Talk about chirp and why it makes this cool Usability and cost Datarate at 2km? What is low power?