LoRa/LoRaWAN tutorial 4: LoRaWAN Device Classes
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This is part 4 of the LoRa/LoRaWAN tutorial.
In this video series different topics will be explained which will help you to understand LoRa/LoRaWAN.
It is recommended to watch each video sequentially as I may refer to certain LoRa/LoRaWAN topics explained earlier.
In this video I will explain what LoRaWAN device classes are.
The LoRaWAN specification defines three device classes:
A(ll)
Battery powered devices.
Each device uplink to the gateway and is followed by two short downlink receive windows.
B(eacon)
Same as class A but these devices also opens extra receive windows at scheduled times.
C(ontinuos)
Same as A but these devices are continuously listening.
Hence these devices uses more power and are often mains powered.
Class A
At any time an end node can broadcast a signal.
After this uplink transmission (tx) the end node will listen for a response from the gateway.
The end node opens two receive slots at t1 and t2 seconds after an uplink transmission.
The gateway can respond within the first receive slot or the second receive slot, but not both.
Class B and C devices must also support class A functionality.
Class B
In addition to Class A receive slots, class B devices opens extra receive slots at scheduled times.
The end node receives a time synchronised beacon from the gateway, allowing the gateway to know when the node is listening.
A class B device does not support device C functionality.
Class C
In addition to Class A receive slots a class C device will listen continuously for responses from the gateway.
A class C device does not support device B functionality.
Check out all my other LoRa/LoRaWAN tutorial videos:
• LoRa/LoRaWAN tutorials
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The presentation used in this video tutorial can be found at:
https://www.mobilefish.com/developer/...
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