End node is sending repeat reads

Devices
1

Hello,

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.

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What happened?

2

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.

3

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.