Is there any way to create/implement templated values for states (or attributes). Like calculating time between two date_times for display? If not, all good, just wondering if there's a standard way of doing this without creating a whole automation to track it.
Is there any way to create/implement templated values for states (or attributes). Like calculating time between two date_times for display? If not, all good, just wondering if there's a standard way of doing this without creating a whole automation to track it.