Time that signal groups has been in the current state

[emiltin]

The web interface of many controllers let you see how long a signal group has been in the current state. The value increase continously, and then resets to zero when the group changes state.

I suggest a way to fetch this via RSMP.

S0001 let's you fetch the current state of signal groups, but doesn't include the time since last change.

If you subscribe to S0001, you can compute data about how long a signal group has been in the current state. But it would be useful and much easier to be able to read the data directly.

[emiltin]

perhaps this could just be a new optional attribute to S0001, e.g. 'age' that would be an array of integers.