How to discover existing reachable LoRa devices


#1

Hello, I wonder if this would be feasible to have a kind of device discovering process.
Imagine you are a gateway installer, how could you get a “picture” of available LoRa devices around the gateway?


(Arjan) #2

As devices only send when they want to, maybe just once a month or even less, you can’t tell how many are around.

If you’re willing to listen for a long time (and assume devices are not moving), then you can collect the different device addresses (DevAddr) from the packets you receive. But even those addresses are not unique, so to tell apart two devices using the same DevAddr, you’d need to rely on signal direction and signal strength, or need to know their secrets.