I have a new HestiaPi image based on bookworm that is ready for testing:
As with all previous releases, this will work with either a Raspberry Pi Zero W or a Raspberry Pi Zero 2 W.
This update is mainly just the same software as before, but on a newer version of Debian. The motivation to update is that the Long Term Support (LTS) on Debian 11 (bullseye) ends on 2026-08-31 whereas Debian 12 (bookworm) has LTS until 2028-06-30.
The default username is pi and the default password is hestia if you want to SSH into it.
However, there are some issues with the v1.4-dev image which have been reported, reproduced and resolved:
- ModemManger service now disabled Lots of issues with v1.4-dev - #12 by N0YKG
- The wifi was (sometimes) not connecting causing the setup screen to come up every boot, which is now fixed Lots of issues with v1.4-dev - #12 by N0YKG
Here’s what I’d like from the people who read this message:
- Flash this image onto an SD card (ideally not the one running your HVAC, as you’ll want to be able to go back to that after testing)
- Swap this image in for the v1.4 image in your thermostat and try it out. It should work as well as the previous one. No additional features have been added.
- Report back here in this thread. What was good? What was bad? Did you even notice any difference?
- (optional) Swap the v1.4 image back into your thermostat so you’re running an image that has been properly tested and not the new image
If testing goes well (which seems unlikely on the first try, there’s almost always something that can be improved) then we’ll submit this image to @HestiaPi for final review and hopefully it will become the new v1.5 or v1.5-dev image.
If testing reveals issues, I’ll try to reproduce them, fix them, make a new image and then we can start this whole cycle over again.

