Low voltage on HassOS vs. ResinOS

I tried to update my hass.io-system from ResinOS to the new HassOS based version. Unfortunatelly there is a major issue with HassOS:

After the migration (it worked for a day) there are issues with under voltage which leads to hass.io not fully starting (ssh works, UI doesn’t). The same configuration works quite well with ResinOS though. Luckily I put HassOS on a new SD-Card so I was able to switch back easily.

I tried several USB wires and several power plugs (even some pretty strong with more then 2.5A): Whenever I try to run HassOS it fails, but ResinOS-Version is working fine. Again: Same configuration. SD-Card is fine, too.

Any ideas?

Under voltage = inadequate power supply.

1 Like

Do you have an Apple 12W adapter you can try?

Most USB adapters are for charging and have crappy filtering and when current load gets high the voltage sags or gets a lot of ripple. This is ok for charging as most devices will ignore it and you just get longer charging time

But to power a device like a rPI you need something that can supply the current at stable voltage. I’ve found (as have many reports and tests) that the Apple 12W adapters do a really good job here. When I ran a rPI I tried many adapters with problems and switched to an Apple one and no issues. Even though technically rated for lower power…

1 Like

Well I have no intention to use a 1kW power supply for my raspberry pi :wink:
I tried several quite solid supplies but whenever I use ethernet on hassos, home assistant won’t start (but add-ons are running and I can SSH into the machine).
Question is, what’s wrong with HassOS as it’s running perfectly on the resinOS based HassIO?

For me it seems to be a badly optimized OS that needs some tweaks before going into production.