A few days ago I made A fresh install by Raspberry Pi - Home Assistant
Now there is update available Core 2026.6.2 to 2026.6.3
Update fails.
Log: 2026-06-16 16:27:40.624 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [546875400864] Error during service call to update.install: Error updating Home Assistant Core: Downloading Home Assistant version 2026.6.3 failed
How can I resolve?
Are you out of space? Is your internet connection working?
Funnily enough, I've just done the same. I installed a fresh version of HA on a new Pi3. It was replacing a Pi2 which is now unsupported.
OK, I get all the all stuff above about 1GB of RAM not being sufficient, but my Pi2 ran all the devices (maybe 40) and a bunch of automations just fine for years, no issues at all.
The Pi3 has been up for just over a week, fresh install, everything installed from scratch so none of the cruft was pulled in from the Pi2.
Everything is work fine (the only real issue I had was Go2RTC which kept crashing and restarting, but as I don't need it it's gone), RAM usage is about 70%, all the automations are running fine.
The only issue I have now is the update from 2026.6.2 to 2026.6.3 same as @Nla
The update runs, spins it wheels for a bit and then goes back to saying there's a new update of 2026.6.3 ?
I've rebooted the Pi3, and tried the update multiple times now. There's 100GB free on the SSD, it has proper RP power supply, it's connected to fast fibre internet. Not sure where to go next?
This pi3 with 1gb of memory in this makes it on the very edge of usefulness and it is also basically not useful. I have a VM with 2gb and it is almost worthless. I can't keep anything running as the whole thing locks up and requires regular hard restarts. I use it for testing and beta, so it's I don't change it, but for production it would be worthless.
(Hint, make certain you don't have Code Server App or more that 1 or 2 other apps running all the time, it runs out of memory and starts using the memory as swap.)
Why NOT to buy a PI to run Home Assistant
@Nla I've found the issue if you have a 1GB Pi, it is a RAM issue. While there is enough to run HA normally, the Pi is running out of RAM during the update process. Due to the way HAOS works it's a bit difficult to see this, I plugged a monitor into my Pi3 and could see the update process being killed by the OOM Reaper (the out of memory process that kills other processes to keep the system running).
I switched off some of the integrations that I wasn't using yet (including ZHA) and the update went through. I guess I'm moving the installation to a Pi4 with 4GB RAM that I'll have spare soon!
Skip the pi family and get something else...
You can happily run HA container install on 1GB Pi with zram compression (even works on 512MB Pi Zeros !...): you may want to check this simple install method, starting from AlpineLinux base rather than PiOS to save a lot of RAM.