Uplink time is in UTC format

ChirpStack Network Server
1

Hello,

I noticed a strange behavior on the uplink timestamps.
I am using Chirpstack Version: v4.9.0
For Gateway I am using:

  1. RPI CM4 + RAK2287
  2. RAK7289CV2

I tested with several different end nodes.
I also tried using UDP and MQTT forwarder.

So here is the issue:
For uplink messages I see UTC time and for downlink it is GMT+4 (my region).
Server is a VM and in chirpstack logs timestamp is ok.

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System time is set correctly:

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Here is one frame which shows correct time in the list (21:49), however inside the decoded data it says gwtime 17:49 (not correct)

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Here is another example, where even the time in the packet list is incorrect > it says 17:49, while it should be +4h

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I checked time on both GWs and it is correct, f.eg:

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Is there explanation for this behavior?

2

Please note that the JSON view of the packet is rendered server-side (and explicitly says +00:00 indicating it is UTC / no offset).The timestamp in the table view is rendered by the browser and follows the timezone of your computer.

3

Hello Brocaar. regarding table view, since it is rendered by my PC/Browser, then it should be incremental, following the time of my PC. But here f.eg sometimes it shows 21:47 and then immediately after next packet it shows 17:47 (4 hours back), then after some packets it again shows 21:49. How this can be explained?

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4

Hello, I don’t know what happening, but in the image the difference appears when the DevAddr is different, it’s can be related.