To delete a group:
- Go to group settings (Hub → Settings (⚙️) → Groups).
- Select the group, move all devices to other groups.
After there are no sensors and devices left in the group, you can delete it by the group settings (⚙️).
⚠️ At the moment, it is impossible to delete all groups from the hub. To completely remove all groups, the hub must be returned to the factory settings!