Ok, after a lot of effort I have it working again. version 7.1.027
Even deleting and uninstalling did not work. So to document what worked for me:

I have VenV installed according to:

cd /home/pi
mkdir Domoticz_Python_Environment
python3 -m venv Domoticz_Python_Environment
source Domoticz_Python ...

Thanks, I will look into that. Anyway, probably I will have to find a way to update Zigpy 0.82 to 0.83 first

Hi, I ran into trouble updating the Z4D module. Updating from the web page did not work. Git pull and hard reset etc succeeded but I got an error
Backend error - unknown error.

I updated de Venv with the requirements. but it still gives the error. The log file states:
2026-02-10 19:00:29.621 Error ...

Working again! For those who want the updated script:

Thanks Walter, I will go from there!

So I failed repairing the old updated version, even after installing libssl1.1. the Requirements update failed as before. So I decided to move to a new Pi5 with beta installed. after installing libssl and moving python to the separate folder as described in the wiki, Z4D was working. However, I also ...

Hi, I am using this script to display daily and cumulative electricty cost in my dashticz dashboard. Recently I have moved to latest beta and new hardware, and now the script is not working any more. I have changed v into v1, bit that does not seem to help.
The log error:
2025-10-04 09:52:00.247 ...

Hi, yes, tonight I will continue the process, thx!

I have managed to get Z4D working on the fresh install. So far no luck with the devices. Here I seem to have Z4D two instances now, one that is working and one that is not. For the 2024 (bullseye) version, I think the "python3 -m pip install -r requirements.txt --upgrade -t " is not working, because ...

hmm. same error. thanks for trying to help!

oh my bad! I just restored the backup files mentioned at the top of the page. Working on it..

Yes, I considered that and am working on moving to a new install from a july image. It has python 3.11.2. It was working (1 device, the coordinator) before I imported my old data. after that Z4D is not working any more, same error. However I still have to try to create the virtual environment.

Thanks for your reply!
The fresh install was for research purposes only. I have indeed edited the domoticz.sh file
My production system is (was) Version: 2024.4 (build 15910).dzVents Version: 3.1.8
Python Version: 3.9.2 (default, Mar 20 2025, 22:21:41) [GCC 10.2.1 20210110]. I was never able to ...

Hi,

After trying to update Z4D from the web interface (first stable 7, then tried rc from de cl), it gives me some errors and it is not starting any more. I tried to create the Virtual environment folder but every time in trying to install the requirements I get an error:

from OpenSSL.crypto ...

Thanks Kedi, I will keep that in mind if this happens again. In the meantime, I will take regular backups..

Thanks! That worked. I disabled the plugin, copied only the DeviceList-XX.txt and Coordinator-XX.backup from the working install. Enabled the plugin again. Then restarted Domoticz. All devices are back, wonderful!

To be sure: with stop the plugin do you mean disable the plugin from domoticz?
I tried after stopping domoticz, but the DeviceList-53.txt file seems to be overwritten once it has started up with a much smaller file

I solved the AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK' error by deleting the OpenSSL folder from /usr/lib/python3/dist-packages/OpenSSL . Then reinstalled pyOpenSSL: pip3 install pyOpenSSL --upgrade, then from the Domoticz-Zigbee folder installed the dependendencies ...

Thank you Pipiche, will try that

After messing up my domoticz system with a failed update, I had to revert back to a version of long ago, now my Zigbeeforfdomoticz is not working any more. Since I have hundreds of (sub) devices in there from my heating system, I'd really like to get this up and running again with the exiting device ...