End node is sending repeat reads


I have an end device programmed to uplink every 20 minutes. It worked fine for the past weeks, but now every 20 minutes he is sending 2 uplink, not just one.

What happened?

Could you confirm that you see the same in the other integrations too (MQTT, HTTP)? It might be a websockets glitch, where a reconnect causes duplicates in the UI. This issue was solved in the latests releases of the ChirpStack Application Server.

The channels are slightly different. Is this node very close to the gateway, that it’s causing some “echo”?
Normally, such a thing should not appear because the LNS should ignore frames of the same or lower FCntUp value. Do check that you did not disable the frame counter check.