Issue with Duplicate Packets on Different Frequencies After Upgrading to v4.11.0

[Volkan_Bulbul]

I recently upgraded ChirpStack from version v4.10.2 to v4.11.0 on my gateway. After the upgrade, I noticed an issue where my gateway is accepting the same packet multiple times, but on different frequencies.

Details:

• My sensor is configured to send packets every 5 minutes.
• Before the upgrade (on v4.10.2), the gateway would receive one packet per interval, as expected.
• After the upgrade to v4.11.0, the same packet is being received multiple times within the same interval, but on different frequencies.
• The data of each packet are identical, except for the frequency.
  17:57:38 frequency 868100000
  17:57:41 frequency 867100000
• It seems that the gateway is mistakenly interpreting the same packet as new packets because of the frequency difference.
• This behavior was not present in v4.10.2 and started immediately after upgrading to v4.11.0.
• Interestingly, FCnt does not increase above 2 for all sensors.

After downgrade version to v4.10.2 there is no issue.

[landinger]

the same problem, how to downgrade, no DLink any more!!

[Volkan_Bulbul]

Download compiled .deb file and install it.
wget https://artifacts.chirpstack.io/downloads/chirpstack/chirpstack_4.10.2_linux_arm64.deb
sudo dpkg -i chirpstack_4.10.2_linux_arm64.deb

[landinger]

Thanks,
in 4.11.0 the ns timestamp fails!

compare to 4.10.2

[LouneCode]

…More information about 4.11.0 version. Following timestamps seems to work OK in 4.11.0:

• fineTimeSinceGpsEpoch
• gwTime
• timeSinceGpsEpoch

[landinger]

You have to check the GW-messages!
I installed a test-Chirpstack and with rel. 4.11.0 it sends no DevTimeAns any more!
The devices continuesly ask for DevTimeReq with no responses!

Rel. 4.11.0 seems to be buggy?

[landinger]

I think I could fix it!
The problem was the version of the redis-server!

An error was signalled by the server - ResponseError: unknown command GETDEL,

martin@lora:~$ redis-server --version
Redis server v=7.4.2 sha=00000000:0 malloc=jemalloc-5.3.0 bits=64 build=97dd375a21f4607a