After 3 months running without any problems my hassio installation stopped working. I can not access the web interface or SSH. If I need to reinstall Hassio is there a possibilty to recover the config?
Depends on why it stopped working. If it’s a problem with the power supply (Pi3 needs a real USB power supply, not a mobile charger, capable of at least 2.4A at a steady 5V), then switching for a quality supply will fix it.
If you don’t have backups off of the Hass.io system, then recovery will depend on the state of the SD card.
Thanks for your answer. The Raspberry does boot and ping to Resin OS works. But I can’t find any logs.