Domoticz Community Forum - Support & Discussion

Hi,
I see errors randomly generated in log. It can occur any time during a day.
I did test port connections on both servers. Firewall is active but 6144 ports are defined properly on both servers/
Tested connections:

Main server:
root@domoticz1:~# nc -zv 10.10.3.10 6144
Connection to 10.10.3.10 6144 port [tcp/*] succeeded!
Remote server:
root@domoticz2:~# nc -zv 10.10.3.2 6144
Connection to 10.10.3.2 6144 port [tcp/*] succeeded!

Passwords are identical
Both systems running the latest beta version on Debian 13 (also updated and upgraded)

At random log messages on both systems:
2026-06-02 05:00:48.397 Error: DZ2: No data received from 10.10.3.10:6144 after 12 seconds. The remote Domoticz may be running an older version that does not support the SIGNv3 protocol. Please update the remote Domoticz instance.

What can I do?

I see the same message after starting the domoticz main server but it only appears once on the latsts stable 2026.2 version.
After the initial message it doesn't appears anymore until I restart the domoticz service.
Since I have a lot of remote servers it can take some time to get them all alligned (I have 28, I use domoticz to monitor the raspberry pi's).
All instances are running the same version, the message started after the update to the new version.
after clearing it it hasn't returned, only when I restart the process on the main server.

I think It tells you that the communication isn't completed yet within those 12 seconds.

Do you have timeouts in your network communication ?

Hi,

I think It tells you that the communication isn't completed yet within those 12 seconds.

Do you have timeouts in your network communication ?.

It could be that this occurs after the daily reboot of the second server. They do reboots daily at 03am (main) and at 05am(slave).
Maybe it can be a network disruption or a long script that is running on the main server.

I did not think of that.
Thanks for the suggestion.
I will look into it.

Issue is closed:
Is related to servers going offline during reboots or maintenance. (reboot, restarting services,....)

hello all,
i just updated my slave RPI , not via sudo bash -c "$(curl -sSfL https://install.domoticz.com)" ) because i could not get that working but via copying it via winSCP . After this the Power and Gasy data is not "copied" to the from RPI 192.168.7 version 2026.2 to 192.168.9 version 2025.2 and have this info in the log.

Error: Remote Domoticz at 192.168.1.9 uses legacy protocol (SIGNv2, expected SIGNv3). Please update the remote Domoticz instance.

according "check for update" is 2026.2 a beta version.

any comment ?