@uebi The hub H100 and most of your sensors do not support the migration feature so far. The sensor T100 in firmware 1.13.0 supports this feature, but hasn't been fully rolled out.

@Ouno The sensor cannot be powered off via software. If you need to deactivate it, physically disconnect the battery -- remove the battery or re-insert the battery pull tab. Button batteries actually...

@Sumerov Did the sensors disappear in the Tapo app as well? You may try to relink H200 to Home Assistant, check whether the sub-devices can be re-synced.

@Botanic88 Check the suggestions here. What to do if firmware update of my Tapo smart devices (smart plug, smart camera, smart lighting) fails?

@stegermeister For warranty matters, please contact the local TP-Link support. Contact Technical Support

@IGallikas This is not supported. You may consider revising your post's title and content to make it a feature request. Then i can help to relocate it to the Feature Request block to gather opinions...