Best way to upgrade domoticz and system

[ricorico94]

Hi,
I currently have a Raspberry 3B+ using Bullseye and Domoticz 2024.4. I'd like to move to latest domoticz stable release (2026.4) and I'm not yet sure if I'll upgrade to latest Raspbian version (Trixie) or not.. I need also to keep OPenzwave for now and some plugins.

If I install a clean version of TRixie and domoticz 2026.4, can I directly load in domoticz my backup from 2024.4 version ?
If not, how can I do ?

Using first my current bullseye version and update domoticz to 2026.6, would it work ? (then working on upgrading to TRixie)
I tried this today, but I faced the OpenSSL3 problem.. I might have found a way to fix that, u to runnig the .upgraderelease call (which seems working), but then domotic doesn't want to restart.. (systemctl status tells me it's active, but even afetr stop/start, I can't access the webpage..)

Thank you for your help,
Ricorico94

[JayDotR]

My advice, reinstall is better than trying the in-place upgrade twice to get to trixie.

Yes, some library issues can occur, but it takes less time as the inplace process .

Tip : use a new sdcard, so you can mount the old one to recover data

[ricorico94]

Clean install is indeed usually ideal, but is it possible to load in Domoticz 2026.4 a backup done with domoticz 2024.4 ?

.. and I agree with your advice. My current attempt is on a new sdcard, copy just made from production system, so that I can roll-back to production sdcard..

[rylfas]

Yes the back-up from a 2024.4 can be used without any problems.

Upgraded this week from a Domoticz 2024 system to Domoticz 2026.4 with the latest full version of Raspberry PI OS 64 bit. Including MQTT, Zigbee for Domoticz, Shelly MQTT and RFXCOM.

All functional after restoring the Back-up.

Good luck.

[JayDotR]

Issues i encountered and how to bypass

Dont copy-paste the full plugins/ folder to the new install. Leave the __pycache__ (python bytecode, either a 32 bit residual, or an old python compiled code) aside. The .db file can be copied once your plugins are all verified.

Some dependencies are nowadays through apt install python3-namoftheplugin. If sth does not exist yet, its time to develop iti had the synology monitor via pysnmp in that case, so i wrote a new version of the plugin :p

[ricorico94]

Thanks a lot for your advice, I'll most likely go through clean install.