Empty Downlink in Data Console


I’m experimenting with homebrew nodes (STM32L with Semtech / mbed stack) on someone else’s gateway.

Uplinks work fine, OTAA and downlinks sometimes. In the console I see empty downlinks.


No fields, no payload, port 0.

Does anyone have any hints or tips what this can be ?

Kind regards,

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Port 0 is network related traffic. Probably ADR data for the node to switch to a more suitable spreading factor and transmission power,

BTW, this question has been asked and answered numerous times, a quick search of the forum should provide this answer as well.

Thanks for pointing out that “port 0” is the key keyword here. That brings up this post :

Which answers the question.

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