I am trying to send a downlink payload through Node-Red with the @chirpstack/node-red-contrib-chirpstack node, I was able to do that successfully by returning “devEui” to the device downlink node.
My question now is that would I be able to do the same with only “devAddr” (without “devEui”) using the same device downlink node? Is there a workaround of some sort?
(I tried & would only get “devEui is undefined” error.)
DevAddr can change, and therefore is not a valid “unique key” for api calls.
It is not predictable if you prefer.
I’m curious to understand why you are trying to do so…
It can change, but there can also be multiple devices using the same DevAddr. In such a case one DevAddr would point to multiple DevEUIs. As each DevEUI has its own device-session, ChirpStack will then validate the MIC against multiple sessions and find the correct DevEUI for the given uplink.
For downlink, this will not work.
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