MapDB - data were not fully read, check your serializer

[Wolfgang_S]

@Mads_Bloch

Second question is there a way to make the system more robust to power outage ?

You need a UPS.
More information on how to do you can find e.g. in the following thread

Beginner's Guide to Network UPS Tools (NUT) on a Raspberry Pi

UPDATE (February 15, 2022): Updated with instructions for adding a second UPS Since I don’t want my OH installation to be corrupted by a power failure, I purchased a CyberPower UPS, and connected it to my Raspberry Pi using Network UPS Tools (NUT). There are various topics in the community about NUT, and this one was the most helpful for my purposes. With everything I’ve learned, here are some instructions to help others get started. Note that this guide is for is a simple setup with the UP…