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Lecture 6 - Wireless Sensors LoRa vs LoRaWAN

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A lecture about sensors that use LoRa and LoRaWAN

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Lecture 6 - Wireless Sensors LoRa vs LoRaWAN

  1. 1. Wireless Sensors LoRa vs LoRaWAN
  2. 2. Outline Low Power Wide Area Network (LPWAN) LoRa Devices LoRaWAN 2
  3. 3. 3 http://www.microchip.com/design-centers/wireless-connectivity/low-power-wide-area-networks/lora-sup-reg-sup-technology
  4. 4. LoRa 4 https://www.stream-technologies.com/lora/about.html
  5. 5. LoRa Long Range Wireless Communication Method Open Frequency ◦ ISM (Industrial Scientific Medical) Frequency Bands 5
  6. 6. Open Frequency ISM ◦ Free frequency bands Advantages ◦ No License Required ◦ Free to anyone Disadvantages ◦ Interference ◦ Low data rate 6
  7. 7. ISM Bands WiFi ◦ 2.4 GHz ◦ 5 GHz LoRA ◦ 415 MHz ◦ 868 MHz ◦ 915 MHz 7
  8. 8. LoRa ISM 8
  9. 9. LoRa Parameters Parameter Value Range Explenation frequency 863 - 870 Mhz / 902 – 928 MHz … The frequency used to transmit data tx power 2 - 14 dBm / 5 – 20 dBm Power used to transmit bandwidth 125 / 250 / 500 KHz Data bandwidth spreading factor 7 - 12 Frequency spreading factor coding rate 4/5, 4/6, 4/7, 4/8 Error correction data are (how many error correction bits) 9
  10. 10. Devices LoRa Transponder Microcontroller ADC GPIO 10
  11. 11. Terminology NODES Small devices ◦ Sensors ◦ Peripherals Slave devices GATEWAYS Powerful devices Router ◦ LoRa ◦ IP Network (Ethernet/WiFi etc) 11
  12. 12. LoRa Nodes 12 LoPy 868/915 MHz ESP32 WiFi/BLE 4 MB Flash Python LORA GPS Hat 868/433/915 MHz LoRa GPS SPI Raspberry Pi 2/3 RN2483 868/433 MHz Microchip
  13. 13. LoRa Nodes 13 Waspmote Libelium 868/915 MHz C/C++ mDot 868/433/915 MHz
  14. 14. Gateways 14
  15. 15. LoRa Gateway IMST IC880A-SPI (Lora Lite) LoRa -> IP ◦ Packet forwarder 8 channels at a time Decodes multiple SF 15
  16. 16. LoRa Gateway Kerlink IoT LoRa -> IP ◦ Packet forwarder 8 channels at a time Decodes multiple SF 16
  17. 17. LoRaWAN 17 http://www.atim.com/en/technologies-2/lorawan/
  18. 18. LoRaWAN 18
  19. 19. Network topology 19
  20. 20. LoRaWAN Network 20 https://www.linkedin.com/pulse/lorawan-10-st%C3%A5le-pettersen
  21. 21. LoRa WAN Classes 21 https://docs.wixstatic.com/ugd/eccc1a_acef1a0dbad649bc894a372cf8ff6beb.pd f
  22. 22. Class A Device 22 https://www.thethingsnetwork.org/wiki/LoRaWAN/Home
  23. 23. Parameters DevEUI ◦ Unique identifier (64 bits) for a device (similar to MAC address) DevAddress ◦ Dynamic address (32 bits) received by device after activation (not unique) AppEUI ◦ Unique identifier for each app (64 bits) GatewayEUI ◦ Unique identifier (64 bits) for each gateway 23
  24. 24. Activating a device OVER THE AIR ACTIVATION (OTAA) Parameters ◦ DevEUI ◦ AppEUI ◦ AppKey ACTIVATION BY PERSONALIZATION (ABP) Parameters ◦ Device Address ◦ Network Shred Key ◦ App Shared Key Less secure 24 https://www.jaguar-network.com/en/news/lorawan-in-a-nutshell-2-internet-of-things-iot/
  25. 25. Questions? 25

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